Why thin triple IG units are gaining popularity
Thin triple insulating glass units deliver high-performance glazing in a slimmer, more efficient package. These units deliver much better U-values than traditional double glazing – while also addressing the issues of thickness and weight.
They are especially beneficial in renovations, where replacing inefficient double IG units by traditional triple IGU can often be challenging. Thin triple units not only provide a significant performance upgrade over double units but also fit neatly into existing window frames, making them ideal for easy window upgrades.
Key differences between thin triple IGUs and other insulating glass types
In the 1980s, double-glazed units typically measured around 20 millimetres thick. By the 2000s, Low-E triple IGUs had emerged, with a thickness of approximately 36 millimetres. These triple IGUs offered enhanced insulation, but also came with a 50 percent increase in both thickness and weight.
Perhaps the most significant difference between thin triple IGUs and their conventional counterparts is thickness. Traditional triple units typically outer panes of 3 to 4 millimetre glass and a 3 millimetre centre pane. In contrast, thin units use a very thin 0.5 millimetre glass for the centre pane.
With a total thickness of only 24.5 millimetres, thin triple IGUs still maintain the same high performance as traditional triple IGUs.
Overcoming production challenges
The development of thin triple IG units required overcoming significant technical challenges. Traditional manufacturing methods, where spacers are first applied to the centre glass pane, proved unsuitable for thin triple IGUs. When 100 degrees Celsius TPS® material is applied to delicate 0.5-millimetre glass, the pane bends, making the conventional approach impractical.
A novel production technology developed and patented by Glaston applies spacers to the thicker outer panes first. This approach modifies the process completely, minimizing stress on the thin centre pane and reducing the risk of breakage. The method allows for automatic production of thin triple IG units – something no one else currently offers.
A cost-effective alternative to vacuum glass
Offering the same or superior performance at a lower cost, today’s thin triple IG units present a viable alternative to vacuum glass – another trending but costly glazing option.
Advancements like this are critical to help the world meet the growing demand for more energy-efficient housing.