Windows can transform a room by allowing natural light in, however traditionally they have been a room's main point of heat loss.
Windows are an important factor in achieving comfort within a home as they can work in the same way as the insulation to stop heat
entering or leaving the home. There are three main classes of performance adaptions to windows:
Double-glazed windows have a sealed air space in between the glazing layers which acts like insulation allowing less heat out in winter and less heat in during summer.
Secondary glazing solutions can transform an ordinary single-glazed window into a double-glazed window.
Improved glasses such as low-e glass and advanced window frames can improve the insulating aspect of windows.
The performance of these windows is measured by a Window Energy Rating System (WERS). This allows you to select the best performing window for your climate zone.