It is possible to specify single, double or triple skin polycarbonate glazing units for fixing directly to an existing kerb or upstand – ideal for refurbishment projects where the glazing needs to be replaced. As there are no integral frames or kerbs, ventilation options are not available when specifying glazing only.
- Triple skin U-value 1.8 W/m2K
- Double skin U-value 2.7 W/m2K
- Single skin U-value 5.3 W/m2K
*The U-values provided above apply to the glazing only. For Building Regulations purposes – the builder & kerb or upstand forms an integral part of the roof.