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Energy Efficiency

Energy Efficiency in Glazing – What’s Changed in 10 Years?

It’s been ten years since the first WER seminar was held. ‘Increase your profits: Energy Efficiency in Focus’ was sponsored by Edgetech and brought together 223 key decision makers from the industry to talk about energy efficiency in glazing. The seminar was filled with debate on the big issues at the time: cutting VAT on Energy Saving Recommended Products, gas loss and the longevity of sealed units.

“As the voice for energy efficient glazing, Edgetech not only played a part in sponsoring the first WER seminars, but was interested in the bigger picture of the industry. Looking back its interesting to see how the predictions have manifested into actions and how far the industry has come,” explains Head of Marketing Charlotte Davies.

2006 energy efficiency in glazing seminarThe 2006 seminar predicted that by 2010: ‘C’ rated windows would be offered as minimum, a major retailer would be offering ‘A’ rated windows as standard and the next revision to Part L of the building regulations would see window thermal efficiency become even more stringent.

In 2006 only a handful of companies had registered for WERs. Around 50 products carried a WER label and Warm Edge Technology had only one percent market share. Three years later, at the 2009 seminar, ‘Edgetech: Energy Efficiency in Focus – Revisited’, more than 200 companies had registered over 1,200 window products to the WER scheme.

“In just those three years, we saw a huge change of attitude in the industry and WERs became an essential way for companies to survive,” continues Charlotte.

The 2009 seminar focussed on market difficulties as the UK began to fall into recession and the 2010 Part L revision loomed. Possible solutions discussed at the seminar included high performance double glazing and triple glazing. The tightening performance requirements, combined with production efficiencies, drove the growth of Super Spacer® and warm edge spacers have now become mainstream in the industry with up to 80% of units incorporating the technology.

2010 workshops for the journey to C rated energy efficient windowsThe nationwide series of ‘Journey to C’ workshops held by Edgetech in 2010 helped companies to prepare for the revised building regulations as a minimum ‘C’ WER became a route of compliance for replacement windows – as predicted by the 2006 seminar.

“As it stands, the seminar timeline finishes in 2014 with The Triple Glazing Question. An event which gathered leading industry figures to talk about the latest issues and opportunities for the glazing industry.

“At Edgetech, we’ve always developed and championed products which improve energy performance down the supply chain and we’re seeing a movement of interest to the next gap in efficiency – the perimeter of the window.

“Installation tapes, such as TruFit®, offer consistent insulation to maintain the performance of the extremely energy efficient windows now on offer. By eradicating the need for silicone and extra trims when installing windows and doors it’s also easier, more efficient and cleaner to fit with. Coloured profiles are another big market trend and TruFit offers a solution to the struggle of colour matching silicone. The expanding foam edge tape gives a clean, defined line between any frame and aperture combination.

“It’s seldom that products come along capable of transforming an industry. It happened with warm edge spacers and now we’re seeing the same shift with TruFit warm edge for windows. That’s why we say: one day all windows will be fitted this way.”

TruPlas – Rigid Warm Edge Spacer

TruPas Rigid Warm Edge Spacer Bar
TruPlas is the rigid, glass reinforced thermoplastic spacer bar from Edgetech UK.

TruPlas has been cleverly designed for increased stability and strength. Its ridged surface offers a more traditional appearance, without any compromise on efficiency or performance.

Benefits of Using Rigid Warm Edge Spacer Bars

TruPlas from Edgetech UK offers excellent high / low temperature performance for windows. Its engineered glass reinforced thermoplastic composition has low thermal conductivity to reduce heat loss in insulated glass units.

The dual-seal warm edge spacer for double glazed units utilises proven technologies, like the vapour barrier with advanced acrylic which strengthens when exposed to heat. It has good UV resistance with no chemical fogging. This prevents HMB “blowing out” in the corners.

TruPlas also has pleasing aesthetics. The ridged surface of the thermoplastic gives a more traditional appearance when used in insulated glass unit manufacture. The three colour choices; black, white and light grey offer good colour stability and the spacer bar has a matte surface finish.

Manufacturing Insulated Glass Units with TruPlas

Insulated glass units can be manufactured with traditional methods using TruPlas. There are a range of machinery options including computer-controlled spacer bar cutting saws and automatic bar bending machinery.

All manual, semi-automated and fully automatic machinery and insulated glass unit manufacturing lines are supported by Edgetech’s technical division. With support during installation and the training process, followed up by troubleshooting help.

TruPlas rigid warm edge spacer bar is available with a range of connecting keys for cut and key and Georgian applications.

Standard corner keys are available in the same colours as TruPlas spacer bar for a seamless appearance and a range of cavity widths are available too.

Gas corner keys are available in similar colours and types – one with a hole for injecting gas into the glazed unit and the other without. Gas key plugs are again, available in the same colours and ensure gas is effectively sealed within the unit.

TruPlas SDL – Warm Solution for IGUs

TruPlas Simulated Divided Lite system offers more choice for IGU manufacturers.

The specially designed I-beam enables greater rigidity and eliminates the possibility the frame twisting inside large insulated glass units twisting which can be a problem with some box section or duplex systems.

Available in black, white and grey to match the TruPlas spacer system, TruPlas SDL is available in a choice of two widths; 18mm and 23mm.

TruPlas SDL is compatible with our range of both flexible and rigid spacer bars.

For more information on our range of rigid spacer ranges, call +44 (0) 2476 639931 or, if you’d like to switch to flexible warm edge spacer bar technology, take a look at our Super Spacer® range.

Super Spacer: Warm Edge Spacer Bar

When insulated glass units (IGUs) use aluminium spacer bars, which are thermally conductive, 80 percent of window energy loss occurs at the edge of the glass. Edgetech offers a wide range of warm edge spacer bar products for the best perimeter insulation of IGUs.

Our Super Spacer® flexible spacer technology brought warm edge technology to the forefront of the market and its clever design and manufacture can help simplify the process of manufacturing sealed glazing units.

Super Spacer is much less conductive than aluminium. Preventing heat loss at the perimeter of the window helps to achieve higher Window Energy Ratings and lower energy costs.

Super Spacer is a flexible, silicone foam spacer. Desiccant-filled with pre-applied side adhesive, Super Spacer is easy to apply and a high-speed, fully automated line can manufacture up to 1400 insulated glass units in a single 8-hour shift.

IGU manufacturing lines and machinery (manual, semi-automated, fully automated and high-speed fully automated) are supported by Edgetech’s technical division. Technical support from Edgetech includes support during installation, training sessions for your team and troubleshooting help.

Edgetech offers a range of Super Spacer warm edge spacer bar products to its customers to suit different applications. Here are the main benefits of each Super Spacer product.

Warm Edge Spacer Bar – Flexible Spacers by Edgetech UK

Super Spacer® Premium

Super Spacer Premium Warm Edge Spacer BarSuper Spacer Premium offers proven performance.

The dual seal insulating glass spacer system uses high-performance acrylic adhesive and is backed by a multi-layer moisture vapour seal.

It reduces window U-values by up to 0.2W/m²K and noise pollution by up to 2dB.

Super Spacer Premium reduces perimeter condensation and typically lasts twice as long as dual seal systems and 5 times as long as single year systems: it carries a 40 year performance guarantee.

There’s no need for Super Spacer to be cut into bar length form, have a PIB primary seal applied or be filled with desiccant which speeds up insulated glass unit manufacture, significantly saves on labour costs and massively increases productivity for IGU manufacturers.

There are three application options for Edgetech customers. Manual application allows a three man team to manufacture up to 250 units in an 8 hour shift. Semi-automated increases this to 400 and fully automated machines can produce up to 960 units in a shift. For high-speed lines this goes up to over 1400. Automated Super Spacer application also means that there is no wastage – reducing production costs even further.

Super Spacer is also ideal for manufacturing triple glazed units. Machines designed for manufacturing triple glazing have two spacer head applicators, for applying two different widths of Super Spacer to a unit. Fully automated lines with two spacer applicators can also be set up to manufacture double glazed units with different widths of Super Spacer for simple and speedy switching to increase efficiency.

Super Spacer Premium is certified by Passive House Institute’s energy efficiency stamp of phA+.

Super Spacer Alpha

Award winning warm edge spacer bar Super Spacer AlphaAward-winning flexible spacer bar, Super Spacer Alpha is the most thermally efficient flexible warm edge spacer bar.

Reverse engineered by the Edgetech team, it achieves exceptional thermal performance and its sculptured shape enables sealant cost savings of up to 20 percent.

Based on 25 years of proven field performance, Super Spacer Alpha comes with a 40-year performance guarantee, has excellent UV resistance and enhanced sound dampening.

It is manufactured from superior silicone foam to offer extreme temperature performance. Its unique dual-seal design allows for enhanced gas retention and immediate unit handling.

Super Spacer Heritage

Super Spacer Heritage for traditional rebateSuper Spacer Heritage is an innovative warm edge spacer bar that answers an age-old issue. It is specially designed to meet the needs of retrofit, restoration and replication projects where the final aesthetics are of paramount importance.

It maintains the high Super Spacer performance but because it is only 3mm deep it replicates single glazed units with ultra slim sightlines and a traditional putty line or glazing bead rebate.

It’s available in unit cavity options of 4mm, 6mm and 8mm and applied using Edgetech’s special Heritage Shuttle. It references the glass edge for a precise line and its flexibility allows sharp 90 degree corners or unusual shapes for a flawless finish and is still quick and efficient to apply.

Super Spacer Triseal™ and T-Spacer

Super Spacer TriSeal Warm Edge Spacer bar is certified by the Passive House Institute.Super Spacer® TriSeal™ Premium is the flexible warm edge spacer bar which has been specially designed to beat the challenges of commercial glazing, including silicone structural glazing.

With a unique, triple seal design it reduces energy consumption in curtain walling systems by up to 15 percent and 29 percent across glazing systems. It has passed the toughest tests in the industry and offers a warmer sightline with up to 8°C improvement.

TriSeal and T-Spacer offer enhanced sound dampening and extreme temperature performance to help customers meet the comprehensive specifications often set in the commercial glazing market.

TriSeal and T-Spacer have been accredited with the Passive House efficiency stamp with phA standard. It reduces condensation and virtually eliminates the potential circumstances in which mould grows.

Click for further information on our Super Spacer warm edge spacer bar product range, or call us on +44 (0) 2476 639931.

One day all windows will be installed this way

“One day all windows will be installed this way,” predicts Alan Fielder, Director of Sales and Marketing at the recent launch of TruFit by Edgetech UK, a Quanex company.
“We’ve shown that TruFit is the best way to install windows for energy efficiency. And it has the added benefit of being quick – up to 20 percent faster – simple and very clean to fit.”

TruFit is a pre-compressed foam sealing tape for window and door installation. It provides an effective thermal barrier at the edge gap between the window or door frame and the reveal. This ensures true energy rating performance and a long-life weather seal. The results in thermal imaging are impressive. Tests of installations with traditional sealant showed how much heat is lost at the edge of the windows. When the same window was fitted using TruFit there was on average 23 percent less heat lost around the window fitted.

“It’s not a question of good or bad installation techniques,” adds Alan. “TruFit works by expanding to effectively seal all gaps and spaces between the frame and wall.” TruFit also improves comfort levels because it reduces draughts caused by cold spots. This is recognised as one of the best ways to reduce heating bills. Even the slightest draft can make us ‘feel cold’ and we often turn up the thermostat to compensate. Take away the draughts and the ambient temperature maintains at a more even level giving us the highest level of comfort.

“TruFit not only saves money for installers and property owners it’s also a great sales opportunity. With so many benefits we believe that all windows in the future will be installed this way. Don’t just fit it, TruFit it!”

Edgetech Promotes Energy Saving Week

The much publicised Energy Saving Week, organised by the Energy Saving Trust, is next week (19th-25th October) which gives installers offering energy rated windows, an additional angle when selling in the home. “This year the general theme for the week is waste and on Tuesday its ‘Warmer Homes Day’, which is a day dedicated to raising awareness of the best ways to insulate our homes,” explains Alan Fielder, Director of Sales and Marketing at Edgetech. “With window installers adding more and more energy efficient home improvement products to their portfolio, they are increasingly becoming more than just installers, and are being seen as energy saving advisers. We are supporting our customers in this role, and raising awareness of this important event, by sending them top tips for energy saving that they can then use while selling in the home. Whether you believe in green or not, initiatives like this are encouraging homeowners to make the greener choice, so we need to be sure we can meet their higher expectations by educating ourselves to all the benefits of the various means of saving energy. This in turn allows us to better demonstrate the relative benefits of energy rated windows, giving our products even more credibility.”

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