If your high-end commercial or residential design calls for an elevated level of connectivity, equal ease of access and an imaginative use of space, consider Klein’s easy-mounting frameless sliding glass corner doors.

Interior doors that swing require extra space to accommodate their function. And even traditional sliding doors can’t be placed on a corner without a floor track or vertical supports.

See how the easy-mounting EXTENDO Corner was used to successfully partition this minimalist workplace application in Frederick, Maryland.

This video demonstrates a corner application composed of two systems: Extendo 2 doors on the left + Rollglass on the right side… with perfect 45º finishes.

Klein USA Slid Corner Door
Non-Conventional Bathroom Entrances
For spaces that require an elegant bathroom entrance, such as minimalist homes or luxury boutique hotels, frameless sliding corner doors can easily be combined with telescoping glass panels or fixed glass panels to maximize the openness of the living place. Due to the recessed installation and the frameless system, these non-conventional door enclosures and telescopic glass and fixed panels give your clients and their guests creative new ways of entering bath environments.

All of Klein’s systems are created to hold whatever type of glass is needed to ensure the proper degree of privacy, including monolithic and laminated which allows the glass panels to be decorated.

Klein USA Corner Door BedroomA Suite Within a Suite
When planning for workplaces, bedrooms, closets or other areas that require a high level of privacy, an elegant corner entryway can be created within a larger suite by combining walls with corner doors. This stunning glass cube partitions the room without dividing it visually.

These corner doors provide unlimited applications for creating partitions for workplaces walk-in closets, or bathrooms, adding beauty and comfort to your home or commercial project.

Corner doors can also be a great way to reimagine entrances to the bedroom. Whether used in homes or hotels, sliding glass corner doors can be integrated into a glass cube or applied on drywall, making your application truly unique. And the obvious benefits of a large corner opening will inspire your clients, especially those who are looking for a unique design for their most demanding visitors.

The ambient, synchronized UNIKMATIC offers another option for a bi-parting corner that opens at 90 degrees.

ADA and LEED-Friendly
Klein USA Extendo Glass Corner Door
Klein’s easy-mounting frameless glass corner doors empower your most creative response to market trends by providing space-saving design that brings in natural light. Due to their day-lighting and ADA capabilities, all Klein glass corner doors, fixed panels and sliding panels, can help you meet LEED project requirements.

Added Amenities
For clients who prefer a non-glass material, the SLID wooden/metal bi-parting doorsprovide an easy-mounting minimalist design for residential and commercial applications, offering the same ease of access and imaginative use of space.

And finally, in a touch of effortless convenience, the self-closing systems mean that the door will never be left open, even if an occupant forgets to close it all the way.

Meeting the challenge of minimalist residential and commercial design is what drives you. Give yourself the tools to exceed expectations: Klein sliding glass corner doors. Don’t just rethink corners – enliven them.

Klein USA Glass Corner Doors Commercial

Klein USA, Inc. is a global leader in high-quality sliding glass door systems uniquely designed to provide the A&D industry with the most innovative solutions, enhancing both space and light sharing.  Use of Klein’s frameless glass corner doors imparts a clean, modern look to any commercial, residential, or hospitality application.

Source : klein-usa


Glazingshopee.com to start selling Facade materials & Facade systems online by 1st December 2016 Register with us as a Vendor at glazingshopee.com  Lunching Shoppe Very soon with spacial discount for vendors as this Diwali

Get More Detail mail us at glazingshoppe@gmail.com

Contact us : 09324789080

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As many as 1,124 green buildings from Maharashtra have been registered with the Indian Green Building Council (IGBC), taking the state at the top position in the green building footprint in the country.

The significant contribution by the state takes India’s registered green building foot-print to 3.86 billion square feet, the second best globally after the United States, IGBC said in a statement issued here.

According to the recent data on state-wise green buildings released by IGBC, part of CII, Maharashtra is followed by Tamil Nadu (355), Karnataka (354), Uttar Pradesh (351), Telangana (253), Delhi (197) and Haryana (194).

With the 3.86 billion square feet of green building foot-print across the country, India has managed CO2 reduction by 50 million tons, ensured energy saving worth 50,000 GW per hour and water savings to 170 gigalitres.

IGBC has set up an ambitious target to facilitate 10 billion sqft of registered green building footprint by 2022.

To realise its target of expanding green buildings foot-print in India, IGBC, during the 14th edition of Green Building Congress 2016 from October 5-8, will be adding 6 more rating systems, which will have specific IGBC green building guidelines for every type of building, as well as infrastructure project in the country.

These include IGBC EB rating, which facilitates conversion of existing building into green building. Presently there are 14 IGBC green building rating systems.

Source : businesstoday


Trying to restore historical buildings while maintaining the character of the past is a common challenge designers and contractors often face today.

Whether it is a skyscraper office tower or just a small, local storefront, the importance of preserving and honoring the past for future generations is a common theme these days. Renovating the Judicial Office Building for the Retirement Systems of Alabama (RSA) in the center of Montgomery was an especially challenging but rewarding experience for all those involved. The renovated high-rise addition was built around the former Alabama Judicial Building to preserve much of the historic structure, such as the ceremonial courtroom, as well as the overall architecture of the former building.

The existing historic courthouse became a hallowed piece of history in the Civil Rights Movement when Martin Luther King spoke on the front steps. This magnificent project celebrates the historic State of Alabama Judicial Building and offers spectacular views of Montgomery’s downtown, the riverfront, and the state capitol building from its landscaped terraces and private executive balconies. It offers covered executive parking, 24/7 security, advanced electrical systems and state-of-the-art climate controls. Its interior is comprised of fine finishes, including wood, limestone, granite, marble, and stainless steel. Paying homage to tradition, the Honor Court even features five life size bronze statues of past Alabama Supreme Court Chief Justices.


Retirement Systems of Alabama RSA Judicial Office Building - Photo 1

The Retirement System of Alabama (RSA) Judicial Office Building is located just west of the State Capitol. The site contains an existing structure and a new 531,000 square foot office building which is the latest edition to the family of RSA buildings present in downtown Montgomery, Alabama.


Led by Bailey and Harris Construction, renovation of the new RSA Judicial Office Building began in 2008 and was completed in July of 2011. Named to celebrate the historic State of Alabama Judicial Building which has resided on the property since 1926, this $99 million project fully restored the existing building and encompassed it within a grand 50-foot tall structurally-glazed grand entrance topped by the twelve story skyscraper. The restored portions of the project have been adapted for premium executive office space and a multi-purpose conference center which features the original Supreme Court chamber and lobby.

Photo credit: www.2wrarch.com


The RSA wanted to make a classic statement from the very beginning which meant shining a window into the world of historic Alabama. When it came time to execute the “big window” to the courthouse, nationally-acclaimed structural glass supplier W&W Glass was selected to make it happen.


The professionals at W&W Glass needed to make the new building the jewel of the existing Montgomery Courthouse complex. The architect 2WR Holmes Wilkins worked with W&W Glass to solidify the right design solution for this feature area. Using structural glass materials supplied by W&W Glass and fabricated in the United Kingdom by Pilkington, the project was glazed by Juba Aluminum Products with the Pilkington Planar system for the entryway curtain walls. The product used is a “point supported” glazing system in which the face glass is supported by stainless steel fittings that bolt the facade glass back to suspended tempered monolithic glass fins to provide the necessary structural support instead of having metal framing behind each piece of glass like traditional curtain wall. This allows an unobstructed view through the wall, looking both inside and out. Because of the vast opening size, the space frame piers visible through the Pilkington Planar wall were needed to support the building structure. The wall was glazed using insulated glass with high performance low-e coatings to minimize energy costs. Visitors are awed by the dramatic four-story lobby/atrium with its high limestone walls, grand staircase, and elevators covered in polished granite, glass, and stainless steel.



Photo credit: www.bailey-harris.com

For more information on this project and all the projects completed and underway by the W&W Glass, go to wwglass.com and look under the portfolio section.


W&W Glass, LLC is a family owned business with a 70-year history in the metal and glass industry, one of the largest metal and glass companies in the New York metropolitan area and the largest supplier of structural glass systems in the country. We have over two decades of experience in the design and installation of various building enclosure systems, including stick-built curtain walls, pre-glazed unitized curtain walls, Pilkington Planar™ structural glass facades, and custom metal and glass enclosure systems. We install all of our work with our own dedicated union labor force. W&W is consistently the largest employer of glaziers in the NY metropolitan area.


Source : wwglass


Stunning curved sliding patio doors and windows, supplied by Balconette, introduce light and take full advantage of panoramic sea views at this award-winning, Art Deco-inspired seafront house at East Lothian on the north-east Scottish coast.

The completion of Promenade House at Musselburgh realises a long-held ambition for Clive and Susan Andrew to build a modern house beside the sea for their retirement that would also accommodate guests, in particular their grandchildren.

The couple’s original design idea was to create the striking feel of an ocean liner combined with a ‘contemporary take’ on Art Deco architectural style. With the yacht club next door, they were keen that the building was in keeping with this tradition.

However, the site – formerly occupied by a subsiding Victorian dwelling – posed a number of opportunities and challenges. These were cleverly overcome by a site-specific design solution from their architect Honor Thomson, of Edinburgh-based Wiszniewski Thomson Architects.

Curved Doors and Windows Scotland

As well as the curved fenestration elements, her plans included positioning rooflights in the south-facing roof to allow light into every level of the building.

“The main opportunities offered by the plot are the panoramic views,” she says. “The plans therefore involved careful consideration to capture the sea views from almost all of the rooms with priority allocated to the main living accommodation on the first floor.

“Here the curved doors do look great and are an outstanding feature. They really fulfil their purpose in making a dramatic statement and opening up the sea views, while letting in a lot of light, which is important as the house faces north. Curved windows in the master bedroom above follow the shape of the building and also allow in much natural light.”

Curved Glass Sliding Doors Scotland

Balconette’s technical team provided assistance with the drawings at the design stage. “The team was very helpful in ensuring the correct dimensions for the curved doors and windows. I would use the company again,” adds Honor.

Delighted with their ‘forever home’, Susan and Clive say the curved doors create quite a stir. “We had been looking for a long time before we saw the doors on Balconette’s stand at Grand Designs Live. We love them and they’re a great addition,” says Susan. “Everybody who visits is very impressed by them and asks to see the view.

“We were looking at straight sliding doors originally, but we would not have achieved the same effect. With the curved doors, there’s no interruption to the view and they’re fantastic when opened up on a sunny day!”

Curved Doors and Curved Windows Scotland

In 2012 Promenade House won the Musselburgh Conservation Society’s annual design award for its ‘striking contemporary design’ and was praised for its contribution to the town’s built environment. It also won Designer House of the Year in the 2012 Scottish Home Awards.

In the same year, the property was Commended in the Saltire Society Housing Design Awards for its ‘organised layout’ making it easy for the owners to occupy well into old age and ‘to realise their long term ambition for a home strongly connected to the sea, powerfully achieved here with curved windows thrusting for the view. These are bespoke and beautifully made and reflect the high quality of detailing and execution throughout.’

Curved Glass Windows Scotland

Source : balconette

Glazingshopee.com awarded the contract to set up In-house Materials performance testing laboratory for Glass Façade Kolkatta.

This in house laboratory would be fully functional by February 2017 & will have international equipments for testing of major raw materials. It will also have cyclical testing equipments for Sliding Rollers, Locks & Corner Cleats for Sliding Windows & Friction stay testing for casement Windows. incline-plane-tester-big

As per Mr. Saurav Guha (MD) of Glass Facades major challenge in Eastern Region is not satisfactory labs prevails them to trust on supplier. With his experience he says if materials performance testing is in house then they can focus on Local Outsourcing of major products & get it in house tested so Customers have satisfactory results on site.

This lab would also help Glass Façade in ensuring Architects, Clients & various companies visit to this testing facility & will help them boost their Sales in Windows & Façade market.

This would be first kind of Lab Installed by any contractor in India to ensure smooth functioning of product on site.

Glazingshopee.com would ensure Glass facades in procuring & commission of this laboratory before February 2017


“A green building is one which uses less water, optimises energy efficiency, conserves natural resources, generates less waste and provides healthier spaces for occupants, as compared to a conventional building.”

Buildings across the world have a tremendous environmental impact during their life. Globally, Buildings are responsible for at least 40% of energy use. Construction of new buildings generate large amount of solid waste and in turn, disturb natural habitat & vegetation.

Green buildings offer immense potential to reduce consumption & regenerate resources from waste and renewable sources


A green building is one which incorporates enviornment friendly features. The building might appear the same like other buildings, but it is different in its approach.

Salient features of a Green Building are:

  • Building envelope design
  • Building system design (HVAC, lighting, electrical, and water heating)
  • Integration of renewable energy sources to generate energy on-site
  • Efficient use of water, water recycling and waste management
  • Selection of ecologically sustainable materials (with high recycled content, rapidly renewable resources with low emission potential)
  • Use of energy efficient and eco-friendly equipments
  • Indoor environmental quality (maintain indoor thermal & visual comfort and air quality)
  • Effective control and building management systems


A Green Home can have tremendous benefits, both tangible and intangible. The immediate and most tangible benefit is in the reduction in water and operating energy costs right from day one, during the entire life cycle of the building.

Tangible benefits:

  • Green buildings consume 40% ~ 60% lesser electricity as compared  to conventional buildings.
  • Green buildings consume 40% ~ 80% lesser water as compared  to conventional buildings, by utilizing ultra low fixtures, rain water harvesting, waste water recycling etc.
  • Green buildings generate lesser waste by employing waste management strategies on-site.

Intangible benefits:

  • Enhanced air quality.
  • Excellent day lighting.
  • Health & well-being of the occupants.
  • Conservation of scarce national resources.
  • Enhanced marketability for the project.


A green building rating system is an evaluation tool that measures environmental performance of a building through its life cycle. It usually comprises of a set of criteria covering various parameters  related to design, construction and operation of a green building. Rating programmes would help projects to address all aspects related to environment and are an effective tool to measure the performance of the building / project.

Two rating systems are followed in India:

  • LEED India (Leadership in Energy & Environmental Design)
  • GRIHA – (Green Rating for Integrated Habitat Assessment) National Rating System

IGBC which is a part of CII-Godrej GBC, has taken on the initiative of promoting the Green Building Concept in India. The council is represented by all stakeholders of the Construction Industry-Corporate, Government & Nodal agencies, Architects, Material manufacturers, Institutions, etc.

As part of indigenization of the LEED rating system, IGBC has been working on LEED – India for the past three years.

LEED India was formally launched in October 2006 but became operational from January 2007.

LEED-India has incorporated few changes like more emphasis on water conservation and adoption of local Indian codes and standards like NBC guidelines, MoEF guidelines for large projects, CPCB norms for DG set emissions, ECBC for energy efficiency, etc.

LEED® India

The Leadership in Energy and Environmental Design (LEED-INDIA) Green Building Rating System is a nationally and internationally accepted benchmark for the design, construction and operation of high performance green buildings.

LEED-INDIA promotes a whole-building approach to sustainability by recognizing performance in the following five key areas:

  • Sustainable site development
  • Water savings
  • Energy efficiency
  • Materials selection and
  • Indoor environmental quality


IGBC, in its endeavour to extend green building concepts to all building types has developed the following rating programmes to cover commercial, residential, factory buildings, SEZ etc
Specific IGBC programs include:

  • IGBC Green Homes
  • IGBC Green SEZ
  • IGBC Green Factory Building

IGBC Green Homes Rating System

Indian Green Building Council (IGBC) Green Homes is the first rating programme developed in India, exclusively for the residential sector.



GRIHA, an acronym for Green Rating for Integrated Habitat Assessment, is the National Rating System of India. It has been conceived by TERI and developed jointly with the Ministry of New and Renewable Energy, Government of India. It is a green building ‘design evaluation system’, and is suitable for all kinds of buildings in different climatic zones of the country.

The rating applies to new building stock – Commercial, Institutional and Residential types of varied functions. It is endorsed by the Ministry of New and Renewable Energy, Government of India as of November 7, 2007.

GRIHA is a five star rating system for green buildings which emphasises on passive solar techniques for optimizing indoor visual and thermal comfort.


The rating system evaluates certain credit points using a prescriptive approach and other credits on a performance based approach. The rating system is evolved so as to be comprehensive and at the same time user-friendly.

While  LEED/IGBC or GRIHA does not certify specific building (glass) products, it does recognize that the selection of glass products plays a significant role in fulfilling LEED/IGBC or GRIHA point requirements.


Glass plays a unique and important role in building design and the environment. It affects design, appearance, thermal performance and occupant comfort. The selection of the right glass is a crucial component of the design process.

India being a tropical country, we need to be careful while selecting a glass. Selection of glass has become more complex since a variety of glasses are available to choose from, ranging from performance to aesthetics.

The properties of glass have also become multifaceted, able to perform a wide variety of functions, like Solar Control to Thermal Insulation. Solar and thermal performance will often be a high priority decision along with appearance  (color, transparency and reflectivity).

AIS products can help architects achieve LEED/IGBC or GRIHA certification for their projects in a number of areas such as energy performance, recycled content, regional material, daylight and views.


Key factors which play an important role in designing the building envelope with glass are as follows.

  • Solar Factor (SF) / Solar Heat Gain Co-efficient (SHGC)
  • U-Value
  • Relative Heat Gain (RHG)
  • Visual Comfort

Solar Factor (SF) /Solar Heat Gain Co-efficient (SHGC)

A combination of the directly transmitted solar and radiant energy and the proportion of the absorbed solar energy that enters into the building’s interior. The lower the number the better solar control

U-Factor (U-Value)

This is the measurement of air-to-air thermal conductance or insulation between indoors and outdoors through the glass. The lower the number the better the insulation or thermal control.

Relative Heat Gain (RHG)

RHG is calculated as follow = (Solar heat gain factor (ASHRAE) 630° W/m2 X shading coefficient of the glass) + ( Temperature Difference x U value)

  • Heat gain due to Solar Factor contributes to 80% of RHG value
  • Heat gain due to U-value contributes to 20% of RHG value

Visual Comfort

Visual Light Transmission

It is defined as the percentage of light transmitted through the glass. It does not determine the color of the glass.

Glass should provide for optimum daylight inside as per the outside condition. Excessive daylight creates glare and makes the occupant uncomfortable.

Energy Conservation Building Code

Energy Conservation Building Code prepared by the Bureau of Energy Efficiency sets minimum standards for external wall, roof, glass structure, lighting, heating, ventilation and air conditioning of the commercial building. ECBC provides minimum requirement  for the energy efficient design and construction of the building.


ECBC covers Buildings with an:

  • Electrical  connected load of > 500 kW or
  • Contract demand of > 600 kVA and / or
  • Building or complexes with Air-Conditioned area > 1000 SQM

The ECBC provides design norms for:

  • Building envelope
  • Lighting system
  • HVAC system
  • Electrical  system
  • Water heating and pumping systems

The code provides three options for compliance:

  • Prescriptive (Component based approach): Each system and sub-system must be complied with minimal performance requirement  as laid down by the code
  • Trade-off (System based approach): This method offers more flexibility than strictly following the prescribed values for individual element. Trade- offs typically occur within building envelope system – roofs, walls, fenestration, overhangs etc.
  • Whole Building Performance: This method helps the designer to evaluate the energy performance of a building, making it more energy efficient by necessary modifications in the design.

Climatic Zones

As per the climatic conditions, India has been divided into 5 climatic zones and ECBC takes these zones into consideration while building envelope design:

Glass Manufacturing Companies In India
  • Composite
  • Hot & Dry
  • Warm & Humid
  • Temperate
  • Cold


Window wall ratio is the ratio of total window area to the total gross exterior wall

Window Wall Ratio = Total Glazing Area / Total Gross Wall Area

  • Determination of Window Wall Ratio of a building
  • Determination of the performance values of the glazing like solar factor, U-value & Light transmission. (check value specific to each climatic zone and window wall ratio)
  • Determination of M Factor for the trade-off of solar factor requirement  by the use of shading devices such as overhangs, vertical fins etc.


Skylight is a fenestration surface having a slope of 60 degrees from the horizontal plane. Other fenestration, even if mounted on the roof of a building, is considered vertical fenestration.

Skylight shall comply with the maximum U-Factor and maximum SHGC requirements of table 1.1. Skylight area is limited to a maximum of 5% of the gross roof area of the prescriptive requirement.


*SRR: Skylight roof ratio is the ratio of the total skylight area of the roof, measured to the outside of the frame, to the gross exterior roof


In Prescriptive approach, ECBC sets values of the light transmission, solar factor, & U-value for the different climatic zones & designed window wall ratio of the building



Trade-off is permitted only between building envelope components. With the trade-off approach, the prescriptive requirement of SHGC can be trade-off with shading devices / overhangs and/or side-fins

  • Shading for all the fenestration getting direct solar radiation by using Sun Path analysis or shading norms
  • Internal Shading Devices (Overhangs and/or Side Fins)

Adjusted/Effective SHGC is calculated by multiplying the SHGC of the unshaded fenestration product by a multiplication factor (M)

SHGC Effective = SHGC Glass X M

Multiplication Factor (M)

(M) Is taken out from the table 1.2 based on the projection factor (P)

Projection Factor (Overhangs / Side Fins)


SHGC requirement of a window can be affected by overhangs on a building. The term called projection factor determines how well the overhangs shade the building’s glazing.

Projection Factor is calculated by

PF = Ratio of projection divided by height from window sill to bottom of overhang (must be permanent)

ECBC provides modified SHGC values where there are overhangs and /or side-fins. An adjusted SHGC , accounting for overhangs and / or fins, is calculated by multiplying the SHGC of the unshaded fenestration product by a multiplication factor (M).



Vertical fenestration areas located more than 2.2m (7 ft) above the level of the floor are exempt from the SHGC requirement in (Table 1.2) if the following conditions are complied with:

  • Total Effective Aperture: The total effective aperture for the elevation is less than 0.25, including all fenestration areas greater than 1.0m (3 ft) above the floor level
  • An interior light shelf is provided at the bottom of the fenestration area, with an interior projection factor not less than”
  1. 1.0 for E/W. SE, SW, NE, and NW orientations
  2. 0.5 for S orientation, and
  3. 0.35 for N orientation when latitude is <23


This method involves developing the computer model (for thermal, visual, ventilation, and other energy consuming process) of the Proposed Design and comparing its energy consumption with Standard Design.

  • Energy simulation software is necessary to show the ECBC compliance. Energy simulation is a computer-based analytical process that helps designers to evaluate the energy performance of a building and make necessary modifications before the construction.
  • Perform hourly analysis of the whole year
  • Used to simulate air-conditioned building and predict annual energy consumption under various head

This simulation process takes into account the:

  • Building geometry and orientation.
  • Building material.
  • Building façade design.
  • Climate indoor environmental condition.
  • Occupant activities and schedules.
  • HVAC and lighting system and other parameters  to analyze and predict the energy performance of a building

Source : aisglass


SWISSPACER has launched a new spacer bar  SWISSPACER Triple is a world first – the only warm edge spacer bar designed specifically for triple glazing.


SWISSPACER Triple gives outstanding energy efficiency and eliminates the need for two single spacer bars. Its centre groove holds the middle pane of glass in place. This allows sealed unit makers to use slimmer 2mm or 3mm middle panes, reducing the overall weight of the sealed unit. Triple glazed units with SWISSPACER Triple are lighter, more durable and easier to install. Available in 25mm, 33mm and 37mm bars, SWISSPACER Triple offers the same excellent thermal performance as its flagship product, Ultimate.

SWISSPACER Triple only requires two layers of butyl seal, which reduces the risk of sealed unit failure caused by gas loss and moisture penetration. It also improves aesthetics with perfect parallel lines and eliminates the ‘wavy’ butyl line along the centre pane, which is common with traditional triple glazed units. SWISSPACER Triple can be processed by hand or on existing machinery for double glazed units. This makes it ideal for all sized sealed unit makers and for those who want to start producing triple glazed units.

SWISSPACER Triple has been used in ‘CLIMATOP EASY’, a new high performance triple glazed unit by Saint-Gobain Building Glass Europe. Thanks to SWISSPACER Triple, this innovative unit has an ultra-slim 2mm centre pane to reduce overall weight.

John Cooper, SWISSPACER Head of Marketing & Sales (UK & Ireland) says: “SWISSPACER Triple is the first of its kind. It’s a game-changer for triple glazed units. Until now, sealed unit makers have had to use two spacer bar in triple glazed units, but you only need to use one SWISSPACER Triple!

“SWISSPACER Triple has the same outstanding thermal performance as Ultimate, and lets manufacturers use a slimmer middle pane for a lighter sealed unit that’s durable, long-lasting, easier to manufacture and easier to install. We believe this significant innovation will help reduce the time and cost of producing triple glazed units. We’re very excited to launch SWISSPACER Triple and we’re sure it will be a huge success.”

Call John Cooper on 07795 688 061 and follow @Ultimate_Spacer.

Source : swisspacer


“Roto Patio Alversa”: New universal hardware for minimum effort in Parallel Sliding and Tilt&Slide systems

2-2Implemented business strategy / In-house development, manufacturing and delivery / Worldwide market launch on 15th November 2016 / Universal platform / One central locking system, one handle and one modular sliding system / Lower costs thanks to combined systems / Four variants / Quick, secure, certified

Parallel Sliding and Tilt&Slide systems: “Milestone” in terms of customer benefits

Leinfelden-Echterdingen – (rp) The goal of achieving a superior position in terms of customer benefits is a clear priority, particularly when it comes to product policy. A “fundamental prerequisite” for this is full independence in development, manufacturing and delivery. This is ultimately the only way to fully exploit the potential of technologies, including in terms of reacting quicker and more flexibly to changing market and customer requirements. Building on this strategic basis, Roto is announcing a “new era” for the “Sliding” product group: From 15th November 2016 onwards, the window and door technology specialist will be offering “Universal hardware for minimum effort in Parallel Sliding and Tilt&Slide systems” worldwide with the launch of “Patio Alversa”. This range fulfils the crucial in-house criteria and represents a “milestone” in terms of customer benefits.

3This innovation ensures the required level of independence, as it will gradually replace the current range of additional products purchased (“Patio S / PS / Z”). As emphasised by Marketing Director Udo Pauly, this product change is not targeted at Roto’s existing industry partners, but is purely the “logical consequence” of its own business strategy. In addition, Roto will of course continue to be a reliable partner for companies that process the existing “Sliding” systems, and guarantees a smooth transition to the “significantly improved” new generation.

A first for the industry and other characteristic features

The most important customer benefit of “Patio Alversa” is that it reduces manufacturing, storage and logistics costs to a minimum on a lasting basis. This is achieved thanks to the combination of universal central locking system, universal handle and modular sliding system, which is implemented in all four variants on offer. This platform concept can be summarised by the catchy slogan “Minimal. Universal”.

6The use of the same central locking system across all the different versions is a first for the industry. The “NT” (plastic, timber) and “AL” (aluminium) components, which have been “tried and tested a million times”, are available for this. These are said to ensure quick processing in the production line and do not require changes in production plants or installation processes. They – and indeed the entire system – have also significantly reduced the number of different parts, thereby simplifying storage.

The same applies to the “universal handle”, which is a special feature of the range. The use of the “Line” and “Swing” series, which are available in all popular colours, further reduces the effort required for administration by simplifying the master data process. This advantage is a further defining feature of the whole product line.

The third characteristic feature of “Patio Alversa” is the modular sliding system. This combines elements from the “NT” or “AL” hardware product range such as espagnolettes and corner drives with components specific to “Patio” such as bogies, scissors-sliders and track sets. The compatible assemblies and standardised work steps enable quick and easy installation. Individual components can be exchanged flexibly, enabling window fabricators to quickly switch between different Parallel Sliding and Tilt&Slide systems and their different ventilation functions when producing windows. For the first time, this includes the ability to combine a Parallel Sliding system with tilt ventilation.

Another aspect in which this innovation earns the “universal” attribute is its range of applications. It is suitable – whether as a window or as a balcony door – for creating doorways to terraces and balconies or for use in conservatories and glass extensions or in offices, studies and kitchens. If required, integrated security components such as strikers and lockable handles ensure efficient, custom burglary inhibition. With its Parallel Sliding variants, Roto also emphasises ease of operation. Much like conventional Tilt&Turn windows, they are based on intuitive handle operation, quiet functioning thanks to the special opening and closing mechanism and optimised run-in and run-out characteristics provided by special damping elements. In addition, the use of the same handles for sliding systems and windows provides a standardised appearance.

Ingenious product family and controlled comfort ventilation

The “Patio Alversa” range consists of four solutions. Brief profiles of these at a glance:

The “KS” variant is a Tilt&Slide system with tilt ventilation. It covers sash rebate widths (SRW) of between 600 mm and 1250 mm and sash rebate heights (SRH) of between 600 mm and 2350 mm, for sash weights of up to 100 kg. For sash weights of up to 160 kg, the corresponding data is: SRW between 600 mm and 1650 mm and SRH between 600 mm and 2700 mm.

Übersicht-System_AlversaThe “PS” variant stands for a Parallel Sliding system with or without night ventilation. For sash weights of up to 160 kg, the possible dimensions are between 720 mm and 1650 mm (SRW) and between 600 mm and 2350 mm (SRH). For sashes with a maximum weight of 200 kg, the corresponding values are: between 1170 mm and 2000 mm and between 600 mm and 2700 mm respectively.

The “PS Air” variant refers to a Parallel Sliding system with tilt ventilation. At a maximum sash weight of 160 kg, the range of dimensions is between 720 mm and 1650 mm (SRW) and between 600 mm and 2350 mm (SRH).

The “PS Air Com” variant combines a Parallel Sliding system with tilt ventilation, which can be conveniently controlled using the window handle. This enables sashes with weights of up to 200 kg (SRW: between 1170 mm and 2000 mm; SRH: between 600 mm and 2700 mm) to be closed with minimal effort. For sash weights of up to 160 kg, dimensions of between 720 mm and 2000 mm (SRW) and between 600 mm and 2700 mm (SRH) are possible.

Practical benefits for installation and certified market readiness

According to Roto, the technical details of the series as a whole include the use of standard Tilt&Turn profiles made from timber, plastic or aluminium and the use of four identical corner drives for centred/variable espagnolettes. The ability to simply clip the scissors-slider into the stay-connecting profile further contributes to the quick and easy installation. The ease with which the height of the bogies can be adjusted has multiple benefits in practice. With its negative range of -2 to +6 mm, it dispenses with the need to move the roller track for lightweight sashes, prevents damage to sashes, as its thread cannot be overwound or unwound, and makes lifting or releasing the sash unnecessary. The substantial retracting distance in turn enables deeper profiles to be used, e.g. for heavy heat-protection windows with triple glazing, and also makes it possible to use exterior handles.

“Patio Alversa” has all relevant certifications in time for its market launch. Roto lists the following certifications in particular: DIN EN 13126-17 (Hardware for Tilt&Slide windows and balcony doors), EN 1670 (Corrosion resistance), EN 1627-1630 (Burglar inhibition), EN 12211/12210 (Resistance to wind load), EN 1027/12208 (Driving rain impermeability), EN 1026/12207 (Air permeability), QM 347 and certificate of compliance. Quote from Udo Pauly: “The comprehensive testing, which our products passed with flying colours, provides our customers with assurance that these innovations are completely market-ready, right from the very beginning.”

The required accompanying materials are of course ready for the launch: The media package for window professionals contains a catalogue, a technical brochure, installation instructions, installation video and connection to the “Roto Con” hardware configurator.

Source : roto-frank


Today, modern windows close virtually air-tight. And that makes regular, need-based, natural ventilation is all the more important. But while many things are a matter of course and run automatically elsewhere, we still ventilate our rooms at home and at the office manually. That is neither convenient nor efficient.

In combination with intelligent sensors, time switches or BUS systems, our concealed electric Roto E-Tec Drive tilt ventilation system integrated completely in the window hardware enablesfully automatic tilting and locking of windows. It is extremely convenient, reduces heating costs and prevents the formation of mould.

  • Regular ventilation intervals can be programmed and create a pleasant room climate through need-based air exchange
  • Steplessly adjustable tilt-depth
  • Reliable, quiet motor operation
  • Suitable for universal use in timber, PVC and aluminium windows
  • Completely concealed in window frame
  • Optimised for low fanlight windows
  • Direct access to the all-round locking window hardware
  • The window can be operated manually at any time
  • Easier installation as well as convenient implementation and operation, the drive can provide optical and acoustical feedback about its state

Suitable for:

  • Tilt-First or Tilt-Only windows made of the frame materials timber, PVC and aluminium
  • Sash rebate width: 690 – 1400 mm
  • Sash rebate height: 290 – 2500 mm
  • Sash weights up to 100 kg

Optimised for low fanlight windows and improved software

The new concealed electronic tilt-opening and locking system Roto E-Tec Drive now is adapted also for application in low fanlight windows.
Optimised accessories ensure an easier installation and a more convenient implementation and operation.
Additionally, the new interface of the electronic unit improves the compatibility with smart home systems.

Source : roto-frank


AIS Ecosense is a unique range of high-performance glass in natural shades available as Enhance (Solar Control)Exceed (Solar Control Low-E), Essence (Low-E) and Edge (solar control glass & thermal insulation – Low E).

Ecosense is the most advanced way to achieve that delicate balance between the outdoors and the indoors, aesthetics and economics, function and finesse. Developed to suit the unique climatic conditions of the Indian subcontinent, Ecosense meets the needs of the Indian consumers who traditionally require more cooling than heating and want to prevent solar radiation from coming in.

It is the perfect amalgamation of energy efficiency and optimum day-lighting, where architects can actualize a state of mind that captures intelligence in every sense – architectural sense, aesthetic sense, economic sense, energy efficiency sense and environment sense.

A natural choice for all environment-friendly architecture, Ecosense is now widely used on exterior facades to keep indoor spaces brighter and cooler. The Enhance, Exceed Essence and Edge ranges are designed to deliver superior performance that allows architects and builders to set a higher standard of green architecture by:

  • Allowing optimum light to pass through windows/facade while absorbing and reflecting away a large degree of the near range Infrared heat.
  • Keeping indoor spaces brighter and cooler.

The Ecosense Enhance Solar Control range includes:

  • Clear series: Dawn, Snow, Aura, Spring, Nectar
  • Blue series: Cove, Orchid Blue, Bay, Marine, Indigo
  • Green series: Pine, Jade, Coral, Meadow, Lime

The Ecosense Exceed Solar Control Low-E range includes:

  • Brook Series: Clear Brook, Blue Brook, Green Brook
  • Vision Series: Clearvision, Bluevision, Greenvision
  • Lite Plus Series:Clearlite Plus, Bluelite Plus, Greenlite Plus
  • Radiance Plus Series: Clear Radiance Plus, Blue Radiance Plus, Green Radiance Plus

The Ecosense Essence Low-E range includes:

  • Clear Essence
  • Green Essence
  • Blue Essence

The Ecosense Edge Solar control Glass & Thermal Insulation – Low-E range includes:

  • Clear Edge (Natura)
  • Blue Edge (Electra)
  • Green Edge (Chroma)

Source : aisglass



Location – Siliguri, kolkatta

Clients – Begraj Group Siliguri

Mr. Sanjay Mittal
Mr. Umang Mittal

Architect – Mass & Void Kolkatta

Mitul Shukla

Contractor – Vision wall systems

Designed By – E Facades Consultants

For More Details Or Contact us at

E Facade Consultants
51, Saidham Shopping,
P.K. Road Mulund (WEST)
Mumbai 400080

Mobile No.: +91 9324789080
Telephone No.: 022-61273092

For More projects Visits Our Site :

also cheek our single stop solution for facade related information, education, business opportunity, searching new jobs, and forums at.



“Why should I get an independent agency to conduct on site tests on a tested façade or window when it has already been tested at a lab and certified?”

Introduction :

A curtain wall façade, aluminium window or door is made up of several components which are cut, fabricated and assembled at a factory before it is installed at the project site. The manufacturers of each component which forms a part of the window would have issued test certificates for their specific product quality but how the component as a part of a system will perform remains untested.

Why test if I am using a pre tested system?

If the developer chooses to use a window or door system from a system supplier which has already been tested for certain specifications then the test certificates for tests conducted in their in house lab or in the country of origin are submitted as proof of performance. However the window fabricated by the system supplier in the country of origin and the quality of the same window fabricated by the approved franchisee in India may not be the same. Under these circumstances it becomes necessary to put in a clause in the tender that the windows will be tested by a third party independent laboratory on a progressive basis. Generally a sample size of 2.5% of the number of windows is considered a representative sample for testing by international consultants.

What if do not have a budget for off site testing?

Another scenario where on-site testing would be opted for is when the size and the number of windows used in a particular project may not
justify the costs for an offsite testing or there is no budget available. Under these circumstances a few onsite tests are the only option left to reassure the developer that there has been no dilution in the performance of the system he has chosen while it is fabricated by a franchisee of the system supplier. The structural performance of the system may not vary widely as the alloy and temper of the aluminum used would almost be the same irrespective of where the profile is extruded. However the performance of the window with regard to air infiltration and water penetration is entirely dependent on the fabrication skill of the window fabricator.

How can I ensure consistency in the quality of the window supplied and installed?

An onsite testing is also a process specified by the developer to ensure every window delivered to his site matches the performance specified by the consultant and is installed with due care. As the windows installation begins in the project an onsite test is conducted by a third party agency on a random window identified by the developer on a progressive basis. If there are any failures identified during the test then the cause of failure is analyzed and corrective action is done on all the windows installed and adequate care is taken by the contractor during fabrication to prevent such mistakes.
On site testing for windows and doors is conducted as per ASTM E 1105 or AAMA 502.02. Both these specifications recommend an air and water test using two methods. The most common method used is to construct a small temporary chamber using aluminium frames and 6 mm plywood to enclose the window from the inside of the building. This chamber is made air tight. An array of nozzles is installed 400 mm(see diagram 1) from the outside surface of the window. Water is sprayed at a flow rate of 3.4 lts/minute/ sq mt on the window at 30-35 psi. A negative pressure is created inside the chamber using a blower and the inside of the window in inspected for water ingress after 15 minutes of spraying. The same blower is also used to suck air out of the chamber through an air flow meter connected in the pipeline to measure the air infiltration.
For onsite testing of curtain walls, skylight and shop fronts AAMA 501.2 are the recommended method. This method involves spraying water on the vertical and the horizontal grooves of the curtain wall system using a specially designed calibrated nozzle at 30-35 psi pressure. The nozzle is held 305 mm from the exterior surface of the curtain wall and gently moved on the groove line for 5 minutes to cover 1.5 mts length. Thus it may take around 25 to 30 minutes to cover all the groove lines within the identified sample area.
A third party agency specialized in on site testing would be able to conduct the test without any bias and submit a detailed report on the results of the test with photographs after submitting a clear method statement of the process followed . The results of the test can be analyzed by the façade consultant and the root cause of failure ,if any, is identified and thereafter corrective can be action taken to prevent further such failures during the execution of the rest of the project.
For the building owner such on-site tests ensure that the windows or curtain walls they have used in their project performs to its full efficiency without any dilution in quality of fabrication or installation.





Stepped glazing has long been considered the Rolls Royce in rooflight orangery glazing at the luxury end of the market, often found in hardwood, timber framed orangery and pool houses costing hundreds of thousands of pounds.

Stepped insulated glass is a common feature in architectural and commercial glazing applications and costs considerably more due to the increased complexity in manufacturing.

But why are stepped units so much better than basic glass units? The answer is simple! The enemy for any glazed unit is UV and water damage to seals, seals sitting in moisture will fail, no matter how good the adhesive or seal depths. Some seals become damaged by Ultraviolet rays from the sun without proper shielding. If water is left to sit on the seals they will eventually perish and fail with condensation appearing in the unit cavity.

Now most rooflight systems on the market are derived from low cost PVC systems due to copycat designing and easy low cost sourcing of glass units. These units usually have an exposed seal which is capped off with a basic extrusion supposed to protect the ends of the unit. Instead the unsightly trims often gather water and Chanel it along the unit seals eventually their drainage slots block with debris that wash off the roof. Unsightly algae and even grass can often be seen growing from these trims, they require constant maintenance to insure longevity of the units. Often the units are held in place with primitive end caps that can allow the glass units to slip into the guttering and sit in water speeding up unit failure, the seals can also very easily be exposed to the suns damaging rays and the finish to the eaves of these roof systems is usually chunky and fiddly.


With a stepped unit system, water is taken clean away from the seal area which stays set right back underneath behind a patented UV blocking border. Keeping it high and dry and well protected with a very clean and neat finish to the glazing. The unit cannot slip as it sits protected, flush within the aluminium kerb system. This makes obvious sense yes? So why don’t all rooflight manufacturers use this system like the top end firms? Like most things it is down to cost! Pretty much every rooflight firm buys in their glazed units from a double glazed unit supplier and these suppliers charge a premium for stepped units! So they use the cheaper, more primitive units in their sloping roofs that require securing in place with fussy, untidy end caps. We often have to replace these units from older rooflights as the true longevity of the non stepped unit is a fraction of our stepped UV blocking units.

With third party testing we know that our stepped UV protected sealed units are good for 30+ years due to their unique construction. Our extensive R&D in this area is backed up by top industry consultants and test houses. So it’s good news that our Slimline pyramid system features frameless stepped edges at the bottom to give the ultimate finish. Clean, minimalist lines ensure that rain water and debris runs clean off the glass without any obstruction from ugly trims. Using a patented UV blocking resin paint system we give these stepped units a very aesthetic border that colour matches the aluminium framework of the roof, black, grey or specialist RAL colour. We give the rooflight the perfect finish that not only hides any gaskets or fittings but stands it apart from the other products on the market. Our frameless Slimline stepped units create the best looking and best performing pyramid rooflight on the market today with true premium stepped units to give you total peace of mind!



Source : roof-maker


Multiple glass options offer customized ways to suit different building needs.

Different buildings have differing needs for aesthetics, performance, and functional operations. Few building materials have as great an impact on all three of these areas as glass since it plays a unique and important role in building design and the environment. The use of glass in buildings affects design, appearance, thermal performance, and occupant comfort. Historically, glass was used mainly for windows to admit air and light, but with advanced manufacturing options and the need for high-performance buildings, it is now integral to interior and exterior architecture. From facades, skylights and walkways to revolving doors and glass box extensions, glass is being used to do much more than just let light in. Therefore the selection of the right types of glass is a crucial element of the design process to create solutions that address thermal control, energy efficiency, views, and lighting quality as well as light quantity. Architects who understand the full range of possibilities available from glass manufacturers are able to use them as a complete palette to create designs that excel in all areas.

Glass and Glazing Overview

The main ingredient of glass is SiO2 (silica sand). During the first half of the 1900s the predominant glass manufacturing technology was to create plate glass from molten SiO2 which moved along rollers while still heated. This created imperfections in the surface of the glass that needed to be ground and polished to produce parallel surfaces that were optically clear. During the 1950s and 60s Sir Alastair Pilkington invented and perfected the process of creating float glass which has become the current world standard for the production of high-quality glass. Float glass is manufactured by melting sand, soda ash, dolomite, and limestone, along with other minor batch materials to produce a continuous glass ribbon. The molten glass flows from the furnace and “floats” over a bed of molten tin where it spreads out to form a level sheet with virtually parallel surfaces. It is then carefully cooled to anneal the glass—a process that minimizes the internal stresses enabling it to be cut.

Common terms and performance criteria relevant to glass include:

U-Factor: The thermal conductance of a material. The lower the number the better the insulation or thermal control. U-factors are often measured at various points in a window unit including the center and the edge of the glass.

R-Value: The thermal resistance of a material. R-values are the reciprocal of U-Factors (R= 1/U) meaning a higher number represents higher thermal resistance.

Solar Heat Gain Coefficient (SHGC): The ratio of solar heat gain through glass relative to the amount of incident solar radiation. The lower the number thegreater the solar control.

Visible Light Transmittance (VLT): The percentage of light in the visible spectrum that is transmitted through the glass. The higher the number, the greater the amount of light that passes through the glass, regardless of its color. Visible light makes up about 47 percent of the solar spectrum, with wavelengths from 380 to 780 nanometers.

Ultraviolet Light (UV): About 2 percent of the solar spectrum with wavelengths ranging 300 to 380 nanometers. Although ultraviolet light is invisible to the human eye, long-term UV exposure contributes to fading and aging of organic based materials. 40 percent of fading comes from visible light other than UV.

Infrared (IR): About 51 percent of the solar spectrum, with wavelengths ranging from 790 to 3,000 nanometers.

Low Emissivity: Emissivity is the ability of a surface to reflect or emit heat by radiation. The lower the number, the more efficiently the object reduces radiative heat gain or heat loss, which means a lower U-factor and better insulation.

Photo courtesy of Pilkington North America

Advances in glass technology give architects a wide variety of choices to meet design requirements for performance, aesthetics, and comfort.

Variations in the float glass manufacturing process or additional actions immediately after allow for the creation of different types of glass and glazing. Each general type is produced to create different properties of light transmission, thermal characteristics, or other inherent structural properties. Several of the common types can be briefly summarized as follows:

Coated Glass

During float glass manufacturing, pyrolytic coatings are incorporated into the glass by depositing microscopically thin layers of metallic oxides using a process known as chemical vapor deposition (CVD). Having this type of hard pyrolytic surface fired on at over 640°C (1,200°F) make pyrolytic products more durable than sputter coating which is a low pressure technique that deposits coatings using physical vapor deposition, typically without applied heat. The pyrolytic process creates extremely durable coated products that can easily be handled, transported, and processed. These products typically combine low emissivity, solar control, low reflection, and self-cleaning properties. In addition, because the pyrolytic surface doesn’t degrade like a sputtered coating, it can be warehoused locally for availability, reducing project lead times across the country and around the world.

Heat Strengthened

Annealed glass is subjected to a special heat-treatment in which it is heated to about 680°C (1256°F) and afterwards cooled. When it is cooled slowly, the glass is twice as strong as annealed glass. If it does break the fragments of the broken glass may remain in the frame but are large. Heat strengthened glass is not recognized as a “safety glass” by typical building codes.

Tempered Glass

Tempered glass is at least four times stronger than annealed glass. When broken, it shatters into many small fragments which reduces the potential for major injuries. This type of glass is intended for glass facades, sliding doors, building entrances, bath and shower enclosures, and other uses requiring superior strength and safety properties.

Laminated Safety Glass

Laminated glass comprises two or more layers of glass bonded together with a plastic or resin interlayer. If broken, the interlayer is designed to hold the glass together. Virtually all glass types can be laminated and the thickness and types of interlayer can be varied to provide ballistic, bomb or physical attack resistance. Laminated glass also provides attenuation of sound and can typically be cut and further processed.

Image courtesy of Pilkington North America

Pyrolytic coatings are applied during the glass manufacturing process to create a product that provides high performance and durability.

Low-e Glass

The type of coated glass provides thermal control and enhanced insulation, as well as control of solar heat gain when combined with a solar control glass in either a monolithic or insulating glass unit. Low-e coatings reduce the emissivity of the glass surface meaning the glass provides greater insulation by reflecting heat back towards its source and can also be designed to absorb or reflect solar energy. As such, low-e coatings are useful for reducing both solar heat gain and heat loss. For a sense of context, uncoated glass has a typical emissivity of 0.84 while a low-e coated glass could have an emissivity of 0.15. This means only 15 percent of heat is absorbed and re-emitted while the rest is reflected. Different combinations of low-e coatings can be used in an insulated glass unit to provide the desired performance.

Insulating Glass Units

Insulating units are two or more panels of glass bonded to a perimeter spacer material with a hermetically sealed airspace. The primary benefit is to improve thermal performance with better U-factors as well as solar control by influencing the Solar Heat Gain Coefficient (SHGC). Most types of processed glass can be incorporated into an insulating glass unit to adjust and fine tune its overall properties accordingly. Double glazed units are the most commonly used type of insulating glass unit, however in some climates the use of multi-cavity triple glazed units is increasing in response to tightening energy codes.

Design Issues and Glass Solutions

With a basic understanding of different manufactured glass types, we can now turn our attention to particular issues that are commonly addressed in building designs to determine the best type of glass that may be suitable solutions.

Controlling Solar Gains

A great deal of the increasing emphasis on energy use in buildings has been placed on the building envelope and particularly on glass and glazing. With the increasing sensitivity toward reducing fossil fuel usage in particular, energy codes and standards have been becoming more demanding in terms of the performance of glazing. They have steadily been raising the bar on performance such that glazing needs to be carefully addressed during design and appropriately specified to both anticipate and achieve the intended energy performance.

The first and perhaps most significant point about energy performance when it comes to glazing is that the building location and the orientation of the glass in respect to the sun (i.e. solar orientation) are the starting points. There is no single universal solution across all locations and all orientations. Energy codes and ASHRAE Standard 90.1 recognize this fact by identifying and defining separate U.S. climate zones which are the basis for determining all other aspects of energy performance and code compliance. From there, the codes require varying degrees thermal performance or solar control depending on location and orientation.

Many commercial buildings are located in warm or temperate climate zones with internal operations that generate heat inside the building (i.e. internal heat loads). Hence, more energy may be needed to cool the building than to heat it in a typical year. Controlling the amount of heat that comes through glass in these cases becomes the dominant design issue then. It should be recognized that heat travels through glass both from the sun’s direct radiation and from the transfer of heat from the ambient exterior environment. Therefore, selecting glass that provides solar control to address both the sunlight and ambient heat reflectance will maximize performance.

Glass can provide direct solar control by one of two fundamental choices. First, it can absorb a portion of the solar energy striking it through the use of absorptive colored tints or absorbing coatings added to the glass. This significantly reduces solar heat and UV light transmittance as compared to clear glass products. Tints add color to the look of the building and reduce the visible light transmittance (VLT) through the glass, all of which are variable based on the degree of tinting and color selected. The key to selecting tinted glass is finding the balance to achieve solar control, help control glare and contribute to the aesthetics of the building. Tinted glass is readily available in a variety of thicknesses (generally between 1/8 inch and 1/2 inch) and can be processed and fabricated similarly to normal float glass making it a convenient way to reduce solar gain. Tinted glass features a full range of color choices such as green, blue, blue-green, bronze, and grey colors. They commonly provide low external and internal reflectance meaning that they are not very mirror-like. They can be laminated, strengthened, and even bent using standard techniques. Further, they can be used singly or in combination with other glazing in insulating glass units. All of these traits have made tinted glass a common solar control choice in low, mid, and high rise office buildings, medical / hospital buildings, educational / school buildings and retail locations.

Image courtesy of Pilkington North America

The chart depicts the percentage transmittance of typical glass types and colors. It demonstrates how tinted glass lowers SHGC through a reduction in transmittance in the Solar Infrared region, while maintaining high light transmittance in the Visible Light region.

Instead of absorbing energy, the other choice of achieving solar control with glass is to reflect it back varying degrees of solar light or heat energy (or both) by applying various coatings during manufacturing. The types and effectiveness of the coating can vary notably between glass products and between manufacturers so it is important to review the technical data to be sure that a coating is selected appropriate to the building, its location, and solar orientation. For example, a coating that produces a low SHGC value will result in very little solar heat passing through the glass while a low-e coating reduces the emissivity of glass and lowers the U-factor. Some manufacturers have coatings that will achieve both solar control and low emissivity and those should be looked at for suitability. Coated glass is available in some fairly clear versions or in a full range of colors including green, blue, blue-green, bronze, gold, and grey. The coatings also commonly reduce UV light transmittance which means fading is reduced in fabrics, artwork, etc. Coatings have been recognized as an ideal means to achieve a rather precise level of solar control for new commercial construction or renovation projects. Specifically by using different coatings on different layers of a dual pane insulated glass unit, the options and possibilities increase for balancing heat gain against light transmittance and U-factors. Hence, coated glass has been commonly used in commercial buildings requiring solar and thermal control such as low, mid and hi-rise buildings, medical/ hospital buildings, educational/ school facilities, office buildings, retail establishments, and residential structures of all types.

Controlling Heat Loss

Turning to colder climates, the approach to thermal energy performance with glass is different. In these locations, the energy required for heating is greater than for cooling over the course of the year. Hence, there is usually a desire to allow sunlight to freely penetrate into the building during the heating season to take advantage of passive solar gains. This means selecting glass with a higher SHGC may be desirable, particularly on sun facing facades. At the same time, low emissivity is desired to redirect energy (i.e. interior room heat) back into a building (rather than out of it), to achieve much lower heat loss than ordinary float glass. For such buildings, this coating is often selected to allow for enhanced clarity and light transmittance which will tend to favor a pyrolytic surface coating over a sputter coating. Once again, the use of different coatings on different layers of insulated glass units allows for some fine tuning of the glazing to suit particular circumstances of different buildings, different solar orientations and different performance needs. The surfaces of insulated glass units are identified by number such that in a typical double pane unit, surface #1 faces the building exterior, #2 is the inner face of the outer pane (in the space between the glass layers), #3 is the exterior face of the inner pane (also in the space between glass layers), and #4 faces the building interior. Usually the coatings are placed on surfaces #2 and #3 so they are not exposed.

Image courtesy of Pilkington North America

Use of a low-e coating on surface #4 in combination with a low-e coating on surface #2 provides a significant reduction in U-factor of approximately 20 percent.

Low-e 4th surface technology

In order to improve the energy efficiency of insulated glass units without increasing the thickness or weight of the window, at least one manufacturer has developed a coating for the 4th surface of the double glazed unit. This 4th surface coating works in combination with a low-e coating on surface #2 to create a significant reduction in U-factor of approximately 20 percent. Pyrolytic Low-E coatings are well suited for this purpose as they provide the advantage of being very durable and difficult to damage, with a track record of use in these types of application for well over 10 years.

Daylighting and Views

In some cases, the visual performance of the glass may be the overriding design issue. This can be true in buildings where daylighting is being used to turn off electric lights and save energy or in cases where the ability to view through the glass with clarity and good color rendition is important. Note that all of the glass discussed for thermal energy performance provides some degree of visual performance and the glass described in this section provides some degree of thermal performance. The distinction is the degree to which the two are balanced or weighted to favor one over the other due to its specific location in a specific building.

Among the things to take into account in selecting glass for daylighting is the quality of the light that will end up in the interior space. The color of the glass or the coating can affect the color of the transmitted light while clear glass will allow for more accurate color renditions. However, clear glass can be a source of glare. If the glass is not shaded, does not face away from the sun, or is not treated to reduce glare, then the shear light intensity or the high contrast between it and the other interior spaces can create disturbing and unwanted bright light. In that case people will often respond by closing blinds or otherwise block the daylight undoing the intended benefit of the design. Selecting a tinted or coated glass therefore that appropriately addresses glare while still keeping the color clear may be an optimal solution in some cases.

Photo courtesy of Pilkington North America

The quality and the quantity of light are important factors for spaces that are naturally daylight using glass.

In addition to letting daylight into buildings, allowing people to view out without undue color or view quality issues is also a common design requirement. Clear glass is available that offers excellent optical properties, transmitting up to 90 percent of the sun’s visible spectrum thus maintaining high clarity and low distortion with brilliant flat surfaces. It is available in a wide range of sizes and thicknesses for optimum utilization and is applicable in commercial, residential, and institutional buildings of all types.

Safety Glass

There are many interior and exterior applications where codes and general practice require the use of safety glass that reduces the possibility of injury if broken. Tempered glass is commonly used, although the tempering process introduces distortion in the glass which can give the unwanted characteristic of visual waviness. Furthermore there is a small risk of spontaneous breakage when using tempered glass, which restricts its use in certain applications. Heat strengthened and laminated glasses are options to mitigate these issues. One thing to be aware of however, is that heat treating float glass to produce either heat strengthened or tempered glass requires a focused cooling process called quenching. The quenching air jets used in a tempering furnace cannot cool the glass with complete uniformity though. As a result some areas are cooled faster than others, resulting in differential shrinkage which creates areas of different compressive stress. This differentiation can create “quench marks” due to very slight changes in the glass density which affects the light passing through the glass. Quench marks should not be considered a defect; they are an indication that the glass has been heat treated. Appearance of quench marks is dependent on lighting conditions and they can be visible in transmission and reflection, and particularly when viewing the glass at an angle other than directly facing the glass. They are more visible in thicker, clear, heat treated, glass; when a lightly reflective coating is used; or when both lights of glass in an insulating glass (IG) unit are heat treated. They become particularly visible in any glass when polarizing sunglasses are worn. Therefore, if viewing clarity is the priority, designs which do not require heat strengthened or tempered glass can be preferable to those that do. It is always important to construct a mock-up of the intended glazing design to gain an understanding of any potential issues related to distortion or quench marks.

Visual Clarity

There are many applications where glass is used and great visual clarity is the major design criteria. This might include retail displays, showrooms, museums, sports stadiums, zoo enclosures and exhibits. In these cases glass is commonly used to create a physical barrier but clear visual characteristics are needed without distortion. Since visual clarity is affected by the amount of visual reflections that appear on the surface of the glass, anti-reflective glass is available to overcome this issue. It is formed by using two pyrolytic coated surfaces in a single laminated glass product to minimize visible light reflectance to less than 2 percent compared to normal clear glass which is 8 percent. This allows more than 90 percent of visible light to transmit through the anti-reflective laminated glass with very low masking reflections. In addition, anti-reflective glass can block more than 99 percent of transmitted UV thus reducing the fading of interior fabric and furnishings. As a laminated glass product, it also offers the traditional benefits of enhanced security, improved safety, and damage protection. It is possible to get anti-reflective glass tempered if increased strength is required. One manufacturer produces an anti-reflective glass that offers a lower emissivity than normal glass; giving improved thermal insulation in addition to a reflection reduction.

Photo courtesy of Pilkington North America

Ordinary glass on the left can produce veiling reflections that obscure the view through to the other side. Anti-reflective glass on the right dramatically improves the clarity of objects beyond the glass.

For situations where very pure color clarity and high VLT are desired, low iron glass may be worth considering. Normally, all glass has traces of iron content which is responsible for the edges of a piece of clear glass appearing green. When glass is manufactured by deliberately reducing the amount of iron present, the green edge color is reduced in intensity and the view looking through the glass is very clear. It is therefore ideal for use where glass edges are visible or where a neutral color is desired. As its light transmission is 1 percent and 8 percent higher than clear float glass in 3 mm to 19 mm thickness respectively, it is perfect for applications where transparency and purity of color are desired. It can be used in anti-reflective glass, in insulated glass units, and for maximizing solar heat gain in colder climates. Low-iron glass can also be heat treated for safety and laminated for security. All of these traits make it a high clarity choice for storefronts and displays, furniture, solar collectors, photovoltaic panels, and special applications requiring thick glass such as bullet resistant glass, aquariums etc.

Photo courtesy of Pilkington North America

Low-iron glass shown on the left is more optically clear without the common green tint found in most conventional glass products as seen on the right, particularly along the glass edges.

Special Building Design Applications

There are a number of building design situations where some very specific needs arise for glass. Manufacturers have responded by developing and testing glass products to meet those special applications.

Fire Resistance with Glass

For building areas that require viewing through glass but also high levels of fire protection, then fire-resistant glass should be considered. It is specifically designed to limit conductive and radiative heat transfer with product performances ranging from 20 to 120 minutes. These glass products must always be used as part of an approved fire resistance or fire protected framing assembly. Fire-resistant glass consists of multiple laminates of float glass and a special transparent intumescent interlayer, which is totally compatible and optically homogeneous with the glass. When exposed to fire, the pane facing the flames fractures but remains in place. As the heat penetrates the glass, the interlayers react by foaming to form a thick, opaque, resilient and tough insulating shield that blocks the conductive and radiant heat of the blaze. As a design tool, it allows natural light and unobstructed views in fire rated walls, openings and doors while restricting the spread of heat, smoke, flames and hot gases. It can be combined with a full range of other glass products to address security, bullet and hurricane resistance or visual clarity requirements. These products are typically tested and classified independently by organizations such as Underwriters Laboratories (UL). Ultimately, it addresses health safety and welfare by reducing fire damage to people, property and valuables.

Photo courtesy of Pilkington North America

Fire-resistant glass can be used to spread daylight and create open visual contact in areas that require fire resistance ratings in buildings.

Acoustic Control

Some buildings are subject to higher levels of noise than others while some building uses are simply more sensitive to noise affecting the occupants / users of that building. Either way, unwanted noise coming from things like roadway traffic, railways, aircraft, factory operations, music, or other activities needs to be limited and controlled. Methods of creating sound insulating walls are common and fairly well known, but if those walls have windows, the glass needs to provide acoustic control as well. Noise control glass is the ideal choice in situations like this. By using a polyvinyl butyral (PVB) interlayer laminated between two layers of selected float glass, manufacturers offer a high quality product that produces excellent noise reduction without compromising on light transmittance or impact resistance. The acoustic performance can be varied by combining different thicknesses of glass with the PVB interlayer to achieve a specified rating. In this way noise control glass offers the opportunity to achieve project-specific noise reduction requirements. It is generally available in a variety of sizes and can be fabricated to meet any needed safety ratings. It can be used singly or in double or triple pane Insulating Glass Units (IGUs). Depending on the configuration and thickness of the glass, test results have shown that noise control glass can achieve STC ratings between 31 and 39. One manufacturer offers a laminate with a special PVB that specifically reduces mid-range frequencies and tests with an STC in the low 40s. Attenuation of mid-range frequencies is important as this includes sounds such as urban road traffic, railway traffic, music and factory noise.

Self-cleaning Exterior Glass

Buildings of many types that contain glazing that is difficult to reach for cleaning or simply require cleaning because of the surrounding environment can create ongoing high maintenance expenses. In response, a rather innovative glass product has been developed that uses the power of the sun to clean itself. This self-cleaning glass can dramatically reduce or eliminate window cleaning, while still offering good visual clarity and an unspoiled exterior aesthetic. This glass uses UV energy from the sun, which is abundant even on cloudy, overcast days, to keep windows clean naturally in several steps. First, a photocatalytic process generated by additives in the glass loosens dirt and gradually breaks down organic residue so it doesn’t adhere to the glass. Next a hydrophilic action on the glass surface causes rain to sheet on the glass, carrying dirt away with minimal spotting or streaking. Under most conditions, natural rain is sufficient to keep the window clean, and a quick spray with a hose will achieve the same result even in prolonged dry weather. Since the coatings used in this self-cleaning glass are pyrolytic and an integral part of the glass surface, they aren’t susceptible to peeling, separation or disintegration over time. In addition, they are not damaged by liquid glass cleaners so there is no need to be concerned about re-coating or retreating the glass. Combined in an insulating unit with an inboard lite of either low-e or solar control glass, all aspects of glazing performance in a building can be addressed and maintained. Self-cleaning glass is commonly available in clear or blue colors and a range of thickness from 1/8 inch up to ¼ inch.

Emerging Technologies

While all of the glass types and products discussed so far represent a fair amount of innovation and technological advances, manufacturers are continuing to pursue even more ways to address building design issues through advanced products. Some of these include the following cutting edge glazing innovations.

Vacuum Insulated Glazing

A vacuum, is very effective at minimizing conduction and convection heat losses. While a perfect vacuum with zero heat transfer is not easily achievable, it is possible to produce a partial vacuum with notably reduced heat transfer. These insulating principles of vacuums are being applied by some manufacturers to create a high performance glass with a thinner profile. They are offering vacuum insulated glazing that is different than conventional double glazing in that the air between the two panes of glass is extracted, to create the needed vacuum. In order to keep the panes from collapsing in on each other, micro-sized spacers are used to keep the panes apart. Nonetheless, the gap between the two panes can be reduced to just 0.2 mm, giving the glass an overall thickness of just over 6 mm (1/4 inch). Heat flow through radiation can be reduced by covering one of the glass panes with a low-emissivity coating, similar to that used in conventional double glazing. Therefore, despite its thin profile, vacuum insulated glazing can achieve U-factors as low as 0.18 Btu/hr.sqft°F in a ¼ inch profile. That means the same or better thermal performance is achieved as conventional double glazing but in one quarter of the thickness and two thirds the weight. That makes it ideal for retrofit or historic preservation projects where an existing window sash or frame needs to be preserved and conventional insulated glazing units won’t fit. Thus it balances historical preservation with modern comfort and environmental requirements while allowing windows that are more in keeping with the original design.

There are of course some variations available for vacuum insulated glazing. For locations that require solar control, the coated surface can be designed to achieve the needed SHGC. For situations that can accommodate the width of IGUs, it is possible to use a triple glazed, coated vacuum insulating glass unit that gives U-factors as low as 0.12 Btu/hr.sqft°F. This combination uses a vacuum insulated glass unit with a conventional spacer, gas fill and a coated outer pane to create a hybrid unit with superior thermal performance. Both designs allow for minimum disruption in existing buildings making it a cost effective method of improving the energy efficiency. The vacuum also allows for improved acoustic performance over single glazing, enhancing the living and working environment. While this is regarded as an emerging technology in the US, it should be noted that it has been successfully used in Japan for over fifteen years and is really a proven solution.

Photo courtesy of Pilkington North America

Vacuum insulated glazing uses clear micro spacers to keep the panes separated but still allows for good visual clarity in the size and weight of glass suitable for historic renovations.

Specialty Glazing

Manufacturers continue to expand and develop the range of coatings that can be used on glass to meet very specific and special needs. As a result, specialty glass has become available that can be used to meet those needs. For example, controlling condensation on glass doors of built in refrigerators / freezers in supermarkets or other retail settings can be an ongoing problem both for maintenance and for visibility of merchandise. As a result, electrically conductive glass has been developed that allows the glass to be electrically heated and overcome this problem. It is color neutral, minimizing reflected color and will not change over time. It easily fabricated with a durable pyrolytic coating that can be handled, cut, insulated, laminated, heat-strengthened and tempered and is even bendable. The heated glass is scratch and abrasion resistant and is available in a variety of glass thicknesses and sheet resistances ranging from 5 ohms/square up to several thousand ohms/square. As a result, heated glass combines thermal control with superior electro-optical properties to keep merchandise clearly visible. Heated glazing has also been used in a variety of architectural applications, such as in restaurants where thermal comfort of the diners is important. Here the heated glazing provides heat to the building occupants.

Other specialty glazing has been developed for electro-optical applications such as computer screens or touch screens in buildings or glazing that will control static when touched. For buildings that want to use photovoltaic (solar-electric) energy, specialty glass and glazing has been developed for both rigid panels and thin film applications. The rise in the use of building integrated photovoltaic cells (BIPV) is made possible because of the effective development and proper use of this type of specialty glazing that maximizes the energy generating potential of these systems.

Electrically conductive specialty glass can be used to keep glass panels clear in retail settings where commercial refrigeration is used.
Photo courtesy of Pilkington North America

Electrically conductive specialty glass can be used to keep glass panels clear in retail settings where commercial refrigeration is used.

Switchable Electrochromic Glazing

When glass is tinted or coated it achieves the resultant performance properties permanently. This means that the glass performs the same way all the time regardless of any changing light conditions outside. An innovative alternative is to use glass that can literally be switched from clear, to lightly tinted to dark tinted and levels in between. This is being achieved by using electrochromic coatings which are applied to panes of conventional float glass or float glass coated with transparent conductive coatings. Electrochromic coatings are typically metal oxides and are thin films like other glass coatings. When a very small electric voltage is applied across the coatings, ions travel between layers, where a reversible solid state change takes place, causing the coating to tint and absorb light. Reversing the polarity of the applied voltage causes the ions to migrate back to their original layer, and the glass returns to its clear state. This ability to switch glass back and forth at will is particularly useful and desirable in large daylit spaces where different uses and lighting conditions dictate different needs for the glass. Typically electrochromic glazing should be integrated into the building control system to maximize efficiency. Other types of switchable glazing are available, including LCD based privacy glass and thermochromic and photochromic based materials.

Green Building Contributions Of Glass

The US Green Building Council (USGBC) has developed the LEED® rating system for green buildings which has been recognized as the leading green building standard in this country. The LEED 2009 system is in place until the year 2015 which overlaps with LEED version 4 introduced late in 2013. Since buildings are currently being designed under both systems, credits available for both are summarized below which properly selected glass products can contribute to.

Optimize Energy Performance

Both LEED 2009 and LEED v. 4 place a strong emphasis on reducing the use of fossil fuels and increasing the use of non-polluting renewable energy. As we have seen, the range of glass products available allow architects and other design professionals to truly optimize performance by selecting glass that is coated, tinted, or otherwise fabricated to best suit a particular building and its location, and even vary the selections to suit individual building facades and installations. If on-site renewable energy is pursued, it is likely that photovoltaic solar cells will be considered which the properly selected glass will support and make possible. In order to receive points in this credit category the building must demonstrate a percentage increase in energy savings in accordance with ASHRAE standards. The number of points earned depends on the degree of energy savings and/or the amount of energy generated on site.

Photo courtesy of Pilkington North America

Solar photovoltaic systems rely on appropriate solar glass to allow the optimization of energy being produced without relying on any fossil fuels.

Materials and Resources

This area has changed dramatically between the different versions of the LEED® rating system. LEED 2009 includes four areas where metal wall panels can contribute to an overall green building:


MR Credit 4: Recycled Content: 10 percent and 20 percent (1 – 2 points) Post-consumer glass is a highly recyclable material that can be re-used or repurposed into a variety of products such as glass containers, counter tops and landscaping material. However, it cannot be utilized in the float glass manufacturing process since even the smallest impurity can compromise the product quality and manufacturing process. Therefore, float glass manufacturing cannot utilize recycled glass as defined by the LEED rating system.


Credit 5: Regional Materials (1 – 2 points). Many glass manufacturing plants are located throughout the USA meaning a regional material contribution is possible depending on proximity to the building.

The Materials and Resources category under LEED v. 4 takes a rather different approach to defining the green nature of building products. The new approach focuses on the full life cycle of those products. The key documentation needed to demonstrate performance under this approach is referred to as an Environmental Product Declaration (EPD). Individual manufacturers or a trade association can prepare specific or generic EPDs for products. In the case of glass products, check with the manufacturer to see what is available for documentation to earn the appropriate points for this updated category.

Indoor Environmental Quality

Under IEQ Credit 8.1 Daylight & 8.2 Views, glass plays a very significant role as has been discussed. The beauty of the range of glazing choices is that daylight can be brought into spaces while still addressing the thermal needs of the building and without blocking the view. Glass products have daylight transmissions ranging from 92 percent down to 8 percent, when single glazed. As outdoor daylight (no direct sun) is in the 1,000 to 2,500 foot candle range, even the lowest transmission (darkest) glass in large sizes, can meet the minimum credit requirement with only 8 percent transmittance of 1000 foot candles (i.e. 80 fc luminance).

Innovation in Design

Under both LEED 2009 and LEED v. 4, credit is given for recognized innovations that exceed minimum performance levels in green building components or systems. Hence, it is entirely possible to achieve some additional credit by using some of the innovative or emerging technologies related to glass that improve on LEED minimum performance levels. More significantly, it is possible to show innovation by using these systems to improve the building overall by finding appropriate ways to address differing needs and strike the right balance between them under different operating conditions.

Case Study

Michigan State University Federal Credit Union Headquarters Building


Location: East Lansing, Michigan


Architect: Daniels and Zermack Associates, Inc.

Gregory A. McKenzie, AIA, Principal-in-Charge, Ann Arbor, MI

Glazing Contractor: Calvin and Company of Flint, MI

Glass Fabricator: PDC Michigan of Plymouth, MI

Glass used: Solar Control Low-e coated

Celebrating its grand opening of a new headquarters building in East Lansing, MI, the Michigan State University Federal Credit Union (MSUFCU) is setting the standard for green construction and sustainable design. The new Gold LEED® Certified, 145,000-square-foot building, along US-127, is the permanent location for the company headquarters. Operating for over 73 years, MSUFCU is the largest university-based credit union in the world. With its primary focus being its members and community, the construction of the new headquarters building proves to be a valuable contribution. MSUFCU in collaboration with Architects, Daniels and Zermack Associates, Inc. in Ann Arbor, MI, have integrated green design and construction materials for an energy efficient, sustainable project.

Daniels and Zermack have been providing innovative building design to financial institutions for over 60 years. The full service firm specializes in new construction, additions, planning, and renovations. Greg McKenzie, AIA, Principal-in-Charge of the project, took the efficiency of the building into great consideration during design. McKenzie worked closely with Glazing Contractor, Calvin and Company of Flint, MI and Glass Fabricator, PDC Michigan of Plymouth, MI to select the best possible glass choices to achieve the desired outcomes. The four story headquarters building showcases 44,000 square-feet of solar control, low-e glazing selected for this project because it provides a perfect blend of visible daylight along with low solar heat gain. The low-emissivity properties combined with solar control result in energy cost reductions compared to ordinary glass.

Overall, nearly 80 percent of the building takes advantage of natural day lighting to reduce the need for artificial lighting,” according to McKenzie. However, MSUFCU wanted a building that did not require the use of blinds since they were viewed as an added cost that compromises the appearance of the building from the exterior. The selected glazing provides glare control which allows for this design option. The contemporary building design blends the aesthetics of all the branch locations, which showcase brick and green glass facades. McKenzie said, “The glass is a great color match and we are very pleased with the result.” The building’s attractive low-e glass facade allows natural light in, absorbs and blocks solar energy, reducing the amount of heat that can enter the building. It combines great aesthetics, solar and thermal performance, subtle reflectivity and glare control all in the final design.


Architects design buildings to meet a variety of criteria and in so doing combine professional skill with appropriate material and product selection. Float glass has been shown to be a vital and integral building material that is manufactured in a full range of products to address many general and very specific design issues. As such, architects are now able to select specific glass products for different projects and façades from a vast range of combinations of tempered, laminated, tinted and coated glass. By understanding the differences and benefits between the different manufactured choices the performance, aesthetics, and functionality come together to create building designs that can meet or exceed expectations.

Peter J. Arsenault, FAIA, NCARB, LEED AP, practices architecture, consults on green and sustainable design, writes on technical topics, and presents nationwide on all of the above. www.linkedin.com/in/pjaarch

As a leading global glass manufacturer, the NSG Group provides one of the broadest ranges of glass products available in the world today. Pilkington products help control energy usage, protect against fire, insulate against noise, provide safety and security, afford decoration and privacy, incorporate self cleaning properties and are used in all-glass facades. www.pilkington.com/na

Source  : NSG Group


Xtralite’s next generation roof light continues to offer the industry greater flexibility during the installation process.

The X2 range was developed to provide a solution to differing roof insulation thicknesses which can cause complications during the rooflight installation process. One of its unique features and probably the most visible is its suite of interchangeable and interlocking PVC extruded kerbs. This system eradicates the need to construct metal frames or timber grounds as the vertical riser sections can accommodate both flat board and tapered insulation schemes therefore offering a totally bespoke kerb height solution.

Following a two-year research and development process Jim Lowther, Sales Director at Xtralite explains why the X2 is so popular: “It’s simple, the X2 offers greater flexibility in its unique design but also addresses requirements for increased sustainability and building performance.”

As well as the interchangeable kerb heights, Xtralite has incorporated a host of design features into the X2. The ventilation has been overhauled to provide numerous benefits. The new design vent offers a maximum of 802cm per linear metre when fully opened which provides increased levels of ventilation over traditional rooflight vents, the system directs air flow upward toward the underside of the glazing which reduces risk of downdraughts and condensation forming. Additionally, the external vent openings are fully protected to reduce risk of moisture and roof grit entering and for the user the vent is actuated by a continuous T section which allows the unit to be easily opened and closed to a desired aperture.

Jim continued: “It was our priority to produce the next generation rooflight that surpasses any industry expectations. The interchangeable and interlocking suite of PVC extrusions is revolutionary in itself but in addition to this is the re-design of the vent which provides greater user comfort whilst benefitting from superior performance.

“All this culminates in a rooflight that not only offers an ‘off the shelf’ yet bespoke solution it affords contractors with a simplified process in which to install the rooflights meaning they can easily be incorporated into both retro-fit projects or new builds.”

Additional features include a choice of glazing from polycarbonate to glass or even a combination of both which meet specific glazing performances such as U and G values, sound attenuation or impact resistance. A double gasket has been added to create a positive seal between the glazing and kerb, reducing the risk of cold bridging and therefore condensation. To further assist the installation process a 60mm removable continuous flange has been added to allow for the application of roofing membrane which also helps with weather protection and reduces the risk of water ingress behind the membrane.

And, last but by no means least, the opening unit itself benefits from a continuous fully protected hinge for increased stability which also reduces the risk of an intruder attack and as the hinge is constructed using extruded PVC it offers maintenance free operation.

When it comes to aesthetics the X2 is a class on its own. Its ergonomic design and smart appearance of the PVCu extrusion both internally and externally means that the X2 not only performs to the highest level of functionality, offers practicality during the installation process but it also offers a superior and more contemporary look.

For more details about Xtralite Rooflights or any of its products, call +44 (0) 1670 354157, visit www.xtralite.co.uk or email sales@xtralite.co.uk


Source : xtralite


About 58% of facade failure is due to component failure. Components are the first line of defense for a facade being a water-tight structure.
Each and every component used in a facade has a varying lifespan. It becomes very important for the designer to understand the service life of the components.
The service life of the components (as shown in figure 1) can be checked as defined in BS 7543.
To maintain the attractiveness of facade and maximize its performance, we need to ensure a regular maintenance regime. More and more awareness has to be created in the building owners for realizing the importance of plant maintenance. If all the defects are checked as shown in figure 2 above and repaired, it will reduce the annual expenditure. The figure also shows that it is possible to extend the durability of facade by taking regular care with a scientific approach rather than investing lump sum amounts to tackle unforeseen failures.
Source : aludecor

AVANCIS launches PV module SKALA for the building sector. CIS module for solar façades is scalable in size and color.

AVANCIS, leading German manufacturer of CIS PV modules, will launch his new architectural PV module PowerMax® SKALA at glasstec (Sep 20 – 23rd, 2016 Hall 11/D59), the leading international trade fair for glass production and processing.

The new freedom for architects and façade builders

Was the construction of photovoltaic façades previously an architectural challenge and linked to clear restrictions, architects and planners now receive a new freedom: The new architecture PV module SKALA from AVANCIS is not only available in different colors and sizes, the panel can be additionally installed both ways, in portrait and landscape format according to the regional requirements. Building engineers, architects and façade planners thus obtain the greatest possible freedom for design, planning and design of the building envelope.

‘Solar façades based on thin-film technology are unique solutions which enable high-quality, aesthetic cladding solutions. They are a real design alternative to traditional façades, and further they generate a significant portion of the energy needs of the building’, says Dr. Franz Karg, CEO of AVANCIS. ‘Our CIS thin-film technology already allows innately high color homogeneity. Thus, with SKALA we have developed an architectural module for the building sector, which not only meets the high standards of performance and design in solar façades, this will set new standards.’

Scalable in size and color

The architectural PV module SKALA is available in different colors and sizes and especially suitable for ventilated facades. Due to the singular mounting system of the module with solid back-rails on the back and no visible clamping on the front, the frameless architecture module inserts shapely into any façade construction.

PV module with General Building Approval sets new standards

Another key feature is the enormous power class of the façade module: Each standard sized black SKALA panel has an output of 135 Wp. Furthermore, this new architecture panel also owns the German General Building Approval (abZ), so time and cost consuming single project audit procedures can be left out right from the beginning.


For further information:

Susanne Häckel
D-81739 München
+49 160 97 25 16 26



AVANCIS develops and manufactures premium thin-film PV modules based on copper indium gallium-diselenide compound (CIGS modules). The innovative process is being developed in its own R&D centers in Munich and Torgau and implemented in the production facilities in Torgau. AVANCIS‘s technology goes back to its pioneering work in the 80s at Arco Solar, evolving in predecessor companies of AVANCIS to its current thin-film technology. AVANCIS´ core brand is the PowerMax© series which is divided in PV modules for solar parks and roof-top solutions (PowerMax 3.5) and architectural modules for buildings (PowerMax SKALA) Since 2014, AVANCIS is part of the CNBM Group.

Source : avancis


CRL-U.S. Aluminum Introduces New StormWall® XL Hurricane-Resistant Curtain Wall for Buildings Exposed to Severe Weather

High–Performance Curtain Wall Provides Exceptional Protection Against High Winds, Airborne Debris, and Water Infiltration

CRL-U.S. Aluminum—a leading manufacturer and supplier of architectural glazing systems–has introduced its StormWall® XL Hurricane–Resistant Curtain Wall.

The curtain wall is engineered to provide steadfast protection against severe weather while meeting stringent building code requirements.

It is NFRC–rated, Miami–Dade Certified (NOA), has Florida Product Approval, and is fully tested to ASTM and TAS Standards. The system will premiere at GlassBuild America this October in the CRL-U.S. Aluminum booth (#1528).

The StormWall® XL Curtain Wall measures 2-1/2″ x 7-1/2″, and is glazed with 1-5/16″ insulating laminated glass. It is thermally improved using a continuous thermal spacer that is interlocked within the horizontal and vertical pressure bars.

With U–factors as low as 0.38, the system easily satisfies the Florida Building Code Fifth Edition (2014) Energy Conservation requirement. The system offers shear block assembly with no exposed fasteners for improved aesthetics and installation flexibility.

Additional performance features include:

  • Large and Small Missile Impact and Cycling
  • Design Pressures: Up to +100/-100 PSF
  • 15 PSF Static Water Resistance
  • Front Set/Exterior Glazed
  • Dry or Wet Glazed
  • Structural Silicone Glazed Option (Two-Sided)
  • Twin Span Capability

“Our engineering experience gives us the ability to develop innovative systems that meet unique regional requirements,” said Gerald Hendrick, president of U.S. Aluminum. “StormWall® XL presents a credentialed, impact–resistant glazing solution for coastal communities that completes a comprehensive product offering. This allows us to not only compete, but also lead in specialized markets across the nation.”

StormWall® XL Curtain Wall can be integrated with CRL-U.S. Aluminum hurricane-resistant windows and doors to provide a complete building façade solution. For more information, call (800) 421-6144 ext. 5305, or emailusalum@crlaurence.com.

Visit crlaurence.com/stormwall

About CRL-U.S. Aluminum
CRL-U.S. Aluminum is an ISO 9001:2008 certified manufacturer and distributor of glazing systems with over 60 years of experience in the industry. The company is a leading supplier to the glazing, architectural, construction, and automotive industries, with service centers located throughout the United States, Canada, Europe, and Australia. With rapid customization capabilities, robust stock inventories, and a worldwide distribution network, CRL-U.S. Aluminum’s single-source model delivers one of the shortest lead times in the marketplace. For more information, call (800) 421-6144 or email askus@crlaurence.com. Glaziers may also visit crlaurence.com. Architects and specifiers, visit crl-arch.com.

Source : crlaurence