I suspect that the windows in your house do not have a thermal break in the metal frames. The thermal break is a plastic insert that separates the outside metal surface from the inside metal of ...

Thermal bridging has a huge effect on energy efficiency in windows. Designers typically try to specify thermally broken or thermally improved window frames, only to be forced by budget constraints to ...

60 thermal insulation up to 0.708W/m².K, sound insulation: 44 dB, security RC4, ah!38 thermal insulation up to 0.816W/m².K, sound insulation: 41 dB, security RC2 ...