Patent ID: 8192658

Claim:
A method of manufacturing an exterior building product comprising: a) forming a slurry of substantially non-gypsum cementitious material with reinforcing fibers; b) forming the slurry into successive fibercement layers; c) incorporating a resinous bond promoter of substantially non-gypsum, acrylic emulsion in an interlaminar region formed between the successive fibercement layers, and spraying a rheological agent of nano-sized magnesium alumino silicate onto the fibercement layers; d) applying pressure and a wood grain impression in the slurry by a method step of molding the slurry with a mold having the wood grain impression and molding at a pressure of at least about 100 psi-500 psi, and dewatering and curing the slurry with the resinous bond promoter in the interlaminar region to bond the successive fibercement layers to one another with an increased interlaminar bond strength.