
The X-Glaze rooflight range provides single, double or triple skin polycarbonate glazing units for direct fixing to a builder’s kerb or upstand. As there are no integral frames or kerbs, the usual range of Xtralite ventilation, access and other options are not available.
Also, the U
d value provided applies to glazing only, as — for Building Regulations purposes— the builder’s kerb or upstand forms an integral part of the roof not the rooflight.