F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
85/110, 85/141,
F16B 35/00 (2006.01) E04D 1/28 (2006.01) E04D 3/36 (2006.01) E04D 5/14 (2006.01) F16B 37/14 (2006.01) F16B 43/00 (2006.01)
Patent
CA 2026968
ATTACHMENT OF ROOFING MATERIAL WITH HEAT-SEALED SCREW-WASHER ASSEMBLAGE Abstract An improved method of attaching a roofing membrane to an underlayment and an improved roofing construction made by the improved method. A screw and a composite roofing washer are used to attach the membrane to the underlayment. The composite roofing washer is an interlocked assemblage of a metal roofing washer and a thermoplastic insert. After the screw has been driven, the thermoplastic insert is heated so as to cause some of the material of the thermoplastic insert to flow over the head of the screw, thereby to heat-seal the screw to the thermoplastic insert. The thermoplastic insert may be so heated when the roofing membrane is welded to another like membrane at an overlapped seam.
Hasan S. Riaz
Thomas Louis
Finlayson & Singlehurst
Illinois Tool Works Inc.
LandOfFree
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