Two-piece roof vent flashing and method for making same

Details Two-piece roof vent flashing and method for making same Two-piece roof vent flashing and method for making same

1994-12-09

1999-01-19

Canfield, Robert

Static structures (e.g., buildings)

Flue connection to building structure

52 58, 52218, 285 42, E04D 1314, E04D 136

Patent

active

058602569

ABSTRACT:
An improved two-piece roof flashing comprises a thermoplastic hard base and an elastomeric rain collar. The hard base comprises a planar base plate with a central dome-like portion, with the dome-like portion having a central opening with a solid flange inwardly disposed and encircling the opening. The rain collar has a central opening sized to accommodate an upstanding roof pipe. The rain collar is molded directly onto the solid flange of the hard base, with the resulting seam between the rain collar and hard base being strong and weathertight. When the collar is molded onto the flange of the base element, the materials of the collar and flange fuse together along the seam between the collar and base element. Additionally, with the collar directly molded to the flange, the design of the flange creates a lengthy path that water must traverse in order to penetrate the roof flashing.

REFERENCES:
patent: 4010578 (1977-03-01), Logsdon
patent: 4160347 (1979-07-01), Logsdon
patent: 4264058 (1981-04-01), Logsdon
patent: 4280305 (1981-07-01), Logsdon
patent: 4526407 (1985-07-01), Kifer
patent: 4864782 (1989-09-01), Hasty
patent: 5036636 (1991-08-01), Hasty
patent: 5237789 (1993-08-01), Thater
patent: 5328212 (1994-07-01), Kosik, Jr. et al.
patent: 5347776 (1994-09-01), Skoff
Never-Leak device (as described in Info. Disclosure Statement attached hereto).

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