Single Ply Membrane
Single ply membranes are composed predominately of synthetic polymer to a thickness of 1mm to 2mm and in some cases reinforced. The roof membranes are sealed at joints to form continuous waterproofing by hot air or solvent welding.
Bituminous felt is used on flat roofs as a cost effective roofing solution. High performance felts are reinforced with polyester/glass and coated and impregnated with bitumen. Installed in at least two layers, the felt is gas torch applied by melting the lower coating and pressing onto the substrate.