Windows, Glazing & Solar Performance5 / 13
Window Types & Frame Performance
Single, double, triple glazing; frame materials (uPVC, aluminium, wood); U-value ranges.
10 min read · Jacob Willis, Net Zero Lead
Windows are the weakest thermal link in most facades. A wall might achieve 0.2 W/m2K while the glazing beside it struggles to reach 1.0. Understanding window performance is essential to controlling both heat loss and solar gain.