Method for applying membrane-covered rigid foam to building surf

Details Method for applying membrane-covered rigid foam to building surf Method for applying membrane-covered rigid foam to building surf

1976-05-03

1978-05-02

Whitby, Edward G.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 79, 156357, 264 455, 264 35, 425 4C, 425817C, 428311, B32B 520

Patent

active

040872963

ABSTRACT:
An apparatus for in situ preparing and applying foam to a surface, such as a roof, and at the same time applying a membrane onto the surface of the foam, produces a foam-membrane sandwich having an upper surface of controlled smoothness and thickness or pitch, which sandwich is firmly held to the treated surface. The apparatus is normally self-propelled and may be automatically controlled so as to be advanced across the surface to be coated with membrane-covered rigid polymeric foam, preferably of polyurethane foam, as the curing pre-foam and covering membrane are applied. In preferred embodiments of the invention the membrane is a roofing felt or fiberglass web, mat, treated paper or cloth fed from the apparatus from a roll thereon, producing with the roof or other surface to be coated, a form into which a curing pre-foam is deposited as the apparatus is advanced.
Also within the invention are processes of producing a membrane-covered, rigid polymeric foam covering on surfaces, such as roofs, by application of a curing pre-foam to the roof under a covering, smoothing and height- or pitch-establishing membrane to which the foam adheres upon curing.

REFERENCES:
patent: 3189498 (1965-06-01), Rapp
patent: 3240655 (1966-03-01), Voelker
patent: 3598671 (1971-08-01), Wortman
patent: 3698972 (1972-10-01), Lenzner
patent: 3959049 (1976-05-01), Tanaka et al.

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