A composite
recovery board (10) containing a foam core (11) of
polyisocyanurate,
polyurethane materials or mixtures thereof; a facer (15), applied to one major surface (13) of the foam core, where the facer includes
polymer materials, reinforced
polymer materials, cellulosic materials, paper,
aluminum foil or trilaminates thereof, wherein the reinforced
polymer material and the cellulosic material are reinforced with glass strands, glass fibers, or mixtures thereof; and,
gypsum board (14), applied to the opposite major surface (12) of the foam core. A method of reroofing a roof by applying composite
recovery boards of the present invention to a roof
deck; and, applying a weather protective layer over the
recovery boards. A continuous method of making a composite recovery board by feeding
gypsum board (14) into a laminator
assembly (21); depositing a foamable polymer liquid (36) onto the
gypsum board; feeding a facer material (15) into the laminator
assembly above the foamable polymer liquid; allowing the polymer liquid to rise between the gypsum board and facer material forming polymer foam of a pre-determined thickness; curing the polymer foam under heat (44) to create the composite board; and
cutting the composite board to desired lengths.