Triple28™ delivers the performance of triple glazing in a format designed for everyday installation. With a profile that fits standard double-glazed frames and only a modest increase in weight, it allows you to upgrade thermal efficiency and security without changing the way your windows are built or fitted. At the core of the unit is a suspended monolithic glass layer, It installs in the same way as a standard double-glazed unit, using familiar tools and techniques - with no additional complexity on site, just improved results.