List of featured suppliers of MEMBRANES APP Modified Bitumen on Building Products Index
Membranes, app modified bitumen are a type of roofing material that is made up of sheets or rolls of asphalt-based material that have been modified with APP (atactic polypropylene) polymers. This modification provides the membrane with improved flexibility, durability, and resistance to weathering and UV rays. The membranes can be heat-welded or cold-applied, and are commonly used as a waterproofing layer in low-slope roofing systems.