Glazing can be a high area of heat loss from a property. This can be reduced wth the installation of double or triple glazing. This type of glazing uses 2 or 3 layers of thin glass with a cavity.
The elements affecting a window’s performance include:
- No. of Glass Layers (more is better)
- The Cavity Width (increasing this will reduce the heat loss)
- The Gas in the Cavity (argon and krypton are better than air)
- Spacer Bars (foam loses less heat than aluminium)
- Low Emmisivity Coating (this reduces the heat loss due to radiation)
- Thermal Breaks in the Frame
- The Frame Material (wood and plastic lose less heat then aluminium)
Currently most double glazed windows have a U-value of 1.6.