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Types of Commercial Roofing Materials. Share with others. Today, we cover the different generic types of commercial roofing materials that are available for flat roofs and low slope commercial roofs. According to the National Roofing Contractors Association, there are five common commercial roofing materials. These include: built-up roof membranes, metal paneling, modified bitumen sheet membranes, single-ply membranes, and spray polyurethane foam roof systems.
It cannot be compacted, and is spread rather than rolled. The British Standard for this type of roofing is BS 8218 :1998 Code of practice for mastic asphalt roofing. Single Ply-are flexible sheets composed predominately of synthetic polymer. Thickness is in the range 1.1mm to 2mm.