Patent ID: 8747714

Claim:
A method of providing narrow roofing membranes having a pair of longitudinally extending gum edges for installation on a roofing surface, the method comprising the steps of: cutting a mesh reinforcing material having a first side and a second side to create at least two mesh reinforcing sheets; separating said at least two mesh reinforcing sheets to create a gap between longitudinal edges of adjacent sheets, said gap sized between approximately 0.25 and 1.5 inches in width; simultaneously extruding a molten thermoplastic layer onto both said first and second sides of said at least two mesh reinforcing sheets and into said gap between said mesh reinforcing sheets to create a single mesh-reinforced thermoplastic roofing membrane, wherein the molten thermoplastic is extruded onto said first and second sides of said mesh reinforcing sheets at a throat of a calendar and wherein said molten thermoplastic is extruded beyond the longitudinal edges of said mesh reinforcing sheets opposite said gap; cutting said mesh-reinforced thermoplastic roofing membrane along about a center of said gap between said mesh reinforcing sheets to create at least two narrow mesh-reinforced thermoplastic roofing membranes having a pair of longitudinally extending gum edges so that said gum edge is about between 0.125 and 0.75 inches in width; and rolling each of said narrow mesh reinforced thermoplastic roofing membranes for shipment to an installation site.