Firestone Building Products Company, LLC

Bfs Diversified Products, LLC

Greg Sharrun

Bruce Douglas

Richard Peng

Brian Saxinger

Douglas Bruce

A method of simultaneously manufacturing multiple mesh-reinforced thermoplastic membranes including providing a roll of mesh reinforcing sheet having a first side and a second side and drawing the mesh sheet through a cutting device to the cut the mesh sheet longitudinally and create a plurality of mesh sheets. The method also includes separating the plurality of mesh sheets to create gaps therebetween and simultaneously extruding a molten thermoplastic layer onto both the first and second sides of the plurality of mesh sheets and over the gaps to create a single mesh-reinforced thermoplastic membrane. The mesh-reinforced thermoplastic membrane is then cut longitudinally along the gaps between the plurality of mesh sheets to create a plurality of mesh-reinforced membranes, each membrane having a pair of longitudinally extending gum edges.

Method of manufacturing mesh-reinforced thermoplastic membranes

A multi-layer roofing membrane is provided including a top sheet including a co-extruded cap and inner layer and a bottom sheet. The use of a co-extrusion die allows for multi-layer sheets that reduce the need for expensive fillers in all but a cap layer of the membrane. A scrim reinforcement layer is optionally embedded in the membrane. When installed on a roof substrate, the membrane can be sealed by heat welding the seams of the membrane sheets or by other means.

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Greenville, SC, United States of America

Greg Sharrun