Insulated roof board

Details Insulated roof board Insulated roof board

1988-07-27

1989-02-14

Van Balen, William J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

4283133, 4283135, 4283166, B32B 326, B32B 516

Patent

active

048045780

ABSTRACT:
Insulated roof board comprising a foamed plastic base layer, a coherent solid intermediate layer having void space therein to permit venting of water vapor, and a relatively hard, dense top layer. The intermediate layer is preferably foarmed by a plurality of shaped bodies, such as polystyrene beads, which are adhesively secured together.

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patent: 4559263 (1985-12-01), Roodvoets
patent: 4587164 (1986-05-01), Freeman
patent: 4651494 (1987-03-01), Wagoner

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