Waterproofing membranes and underlayment are best choice for roofs as the waterproofing sheet. Detailed Product DescriptionProduct Name: Waterproofing Membrane Width of roll: 1m; Thickness : 2mm , 3mm , 4mm,Area of roll : 15sq.m , 10sq.m , 7.5sq.m;Low temperature flexibility : -18/-25Surfaced materials : PE film , granule, slate , metal foil , sand , mineral and etc;Applications: Bridge building, ...