Thermoplastic roofing membrane attachment system

Abstract

A method of securing a thermoplastic roofing membrane onto a roofing assembly, by: (a) providing a roofing component positioned at the top of a roofing assembly, wherein the roofing component has a thermoplastic top surface; (b) placing a thermoplastic roofing membrane over the top of the roofing component; and then (c) heating the thermoplastic roofing membrane together with the top surface of the roofing component to cause the thermoplastic roofing membrane to fuse to the top surface of the roofing component.

What is claimed is: 
     
         1 . A method of securing a thermoplastic roofing membrane onto a roofing assembly, comprising:
 providing a roofing component positioned at the top of a roofing assembly, wherein the roofing component has a thermoplastic top surface;   placing a thermoplastic roofing membrane over the top of the roofing component; and   heating the thermoplastic roofing membrane together with the top surface of the roofing component to cause the thermoplastic roofing membrane to fuse to the top surface of the roofing component.   
     
     
         2 . The method of  claim 1 , wherein a top surface of the roofing component is made of TPO, PVC, polyethylene, polypropylene, ethylene copolymer with other alpha olefins or polymer blends of these polymers. 
     
     
         3 . The method of  claim 1 , wherein the roofing component comprises an insulation board with a thermoplastic top surface. 
     
     
         4 . The method of  claim 1 , wherein the roofing component comprises a coverboard with a thermoplastic top surface. 
     
     
         5 . The method of  claim 1 , wherein the roofing component comprises an air barrier with a thermoplastic top surface. 
     
     
         6 . The method of  claim 1 , wherein the thermoplastic membrane and the top surface of the roofing component are heated and fuse together along a longitudinally-extending seam across the roofing assembly. 
     
     
         7 . The method of  claim 1 , further comprising:
 placing an edge of a second thermoplastic roofing membrane over an edge of the first thermoplastic roofing membrane; and then   heating the edges of the first thermoplastic roofing membrane and the second thermoplastic roofing membrane over the top surface of the roofing component thereby causing the edges of the first and second thermoplastic roofing membranes to fuse together and fuse to the top surface of the roofing component.   
     
     
         8 . The method of  claim 1 , wherein the roofing component is a polyiso foam insulation and the thermoplastic top surface of the roofing component is a thermoplastic facer attached onto the polyiso foam insulation. 
     
     
         9 . The method of  claim 8 , wherein the thermoplastic facer includes a tie layer. 
     
     
         10 . The method of  claim 8 , wherein the thermoplastic facer includes a reinforcing scrim layer. 
     
     
         11 . A roofing system, comprising:
 a roofing assembly;   a roofing component positioned at the top of the roofing assembly, wherein the roofing component has a thermoplastic top surface; and   a thermoplastic roofing membrane positioned over the top of the roofing component, wherein the thermoplastic roofing membrane is fused together with the top surface of the roofing component.   
     
     
         12 . The assembly of  claim 11 , wherein each of the thermoplastic roofing membrane and the top surface of the roofing assembly is made of TPO, PVC, polyethylene, polypropylene, ethylene copolymer with other alpha olefins or polymer blends of these polymers. 
     
     
         13 . The assembly of  claim 11 , wherein the roofing component comprises an insulation board with a thermoplastic top surface. 
     
     
         14 . The assembly of  claim 11 , wherein the roofing component comprises a coverboard with a thermoplastic top surface. 
     
     
         15 . The assembly of  claim 11 , wherein the roofing component comprises an air barrier with a thermoplastic top surface. 
     
     
         16 . The assembly of  claim 11 , wherein the roofing component is a polyiso foam insulation board and the thermoplastic top surface of the roofing component is a TPO facer attached onto the polyiso foam insulation board. 
     
     
         17 . The assembly of  claim 16 , further comprising:
 a second thermoplastic roofing membrane positioned over the first thermoplastic roofing membrane; wherein the first and second thermoplastic roofing membranes are fused together to the top surface of the roofing component.   
     
     
         18 . The assembly of  claim 11 , wherein the thermoplastic top surface includes a tie layer. 
     
     
         19 . The method of  claim 11 , wherein the thermoplastic top surface includes a reinforcing scrim layer. 
     
     
         20 . The method of  claim 16 , further comprising:
 a bottom facer underneath the polyiso foam insulation board.