What Does Scrim Do in a Roof Membrane?
Scrim is the reinforcing fabric inside many single-ply membranes, including TPOPrimary Roof Covering - TPO (thermoplastic polyolefin) is a white roof covering used on flat (low slope) roofs, commonly installed on commercial buildings to create a continuous waterproof surface. More, PVCPrimary Roof Covering – PVC (polyvinyl chloride) is a heat-weldable single-ply roof membrane used on low-slope roofs, particularly on buildings where grease, oils, or other chemicals may contact the roof. More, and KEEPrimary Roof Covering – KEE (ketone ethylene ester) is a solid, flexible polymer used in some low-slope roof membranes to help maintain flexibility and resist chemical and weather exposure. More. The membranePrimary Roof Covering - A single-ply membrane is a roof covering that uses one continuous layer of material to waterproof low-slope roofs. More material provides the waterproof surface while the scrim acts as the skeleton inside that gives the sheet strength and helps it hold its shape.
Scrim comprises strands of woven, knitted, or nonwoven fabric. The strength of those strands and how densely they are woven affect how well the membrane resists forces that pull, stretch, tear or puncture it.
Because the scrim carries most of the membrane’s reinforcing strength, two membranes of similar thickness can perform differently depending on how their reinforcement is constructed.