High strength structural insulated panel

Abstract

Generally flat structural panel for building construction includes an inner insulating core such as of plastic foam and a pair of opposed outer facings, or sheets, bonded to the panel's insulating core. One of the outer facings is of gypsum composite, or gypsum fiberboard, while the other outer facing is of oriented strand board (OSB) impregnated with plastic, such as a polyisocyanurate or urethane resin. The gypsum fiberboard forms the panel's inner surface, while the plastic impregnated OSB forms the panel's outer surface. The panel's outer facings provide high tensile strength, with the gypsum fiberboard facing also affording high load bearing capacity as well as resistant to fire, the environment, and insects. The plastic impregnated OSB does not expand or contract with changes in humidity to maintain a planar configuration for the panel with a smooth, uniform surface for exterior finishing.

Dependencies are inferred from the claim text.