Attachment of roofing washer with heat-sealed screw-washer assem

Details Attachment of roofing washer with heat-sealed screw-washer assem Attachment of roofing washer with heat-sealed screw-washer assem

1990-05-25

1991-05-28

Raduazo, Henry E.

Static structures (e.g., buildings)

Disparate sheet lamina between exposed surfaces of wall,...

Tie crossing dividing lamina

52409, 52512, 52467, 52741, 411915, 411377, E04B 500

Patent

active

050183290

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.

REFERENCES:
patent: 4074501 (1978-02-01), Sandqvist
patent: 4282050 (1981-08-01), Thiis-Evensen
patent: 4380413 (1983-04-01), Dewey
patent: 4476660 (1984-10-01), Francovitch
patent: 4663910 (1987-05-01), Hasan
patent: 4686808 (1987-08-01), Triplett
patent: 4712959 (1987-12-01), Hasan
patent: 4726164 (1988-02-01), Reinwall et al.
patent: 4744187 (1988-05-01), Tripp
patent: 4757661 (1988-07-01), Hasan
patent: 4860514 (1989-08-01), Kelly

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