Abstract: A heat resistant foamed material is disclosed, comprising a cellular foamed resin having associated therewith talc in sufficient quantity to provide enhanced fire resistance to the foam. In various embodiments the talc may be incorporated throughout the foam, concentrated at or near the surface of the foam, incorporated in a facing for the foam which facing comprises a mat (preferably of glass fiber) impregnated with talc, or incorporated into a coating, such as asphalt, with which the facing for the foam is impregnated. The heat resistant faced or unfaced foams incorporating talc are useful as thermal insulations for buildings, particularly for building roofs.

Abstract: A plywood body is disclosed which comprises at least two plies of wood bonded together with a phenolic resin adhesive having platey talc incorporated therethrough in amounts of about 5 to 200 parts by weight per 100 parts by weight of resin. Such plywood bodies (particularly boards) have significantly greater fire resistance than do plywood bodies containing conventional phenolic adhesives.