PVC Membrane (Polyvinyl Chloride) Soprema (Sentinel PVC) Sika Sarnafil Lexcan Roofing Systems Elevate Carlisle SynTec Systems TPO Membrane (Thermoplastic Polyolefin) Carlisle SynTec Systems Elevate Lexcan Roofing Systems EPDM Rubber Membrane (Ethylene Propylene Diene Monomer Rubber) Carlisle SynTec Systems Elevate Lexcan Roofing Systems 2 Ply Modified Bituminous Soprema Garland IKO Bakor BUR (4 ply and Gravel) Johns Manville