Single-ply PVC membranes were common from the 1960s ... Slate roofing isn’t new; it has long been a designer roofing material known for its longevity and curb appeal. It isn’t more mainstream ...
It weighs only 3.25 kg/m2 enabling all types of flat roofs made of bitumen, PVC ... zinc is a material that expands a lot and is difficult to fix without risk of damaging the roof ...