Abstract: An embodiment method can form an oriented strand board panel. A lay-up has a first surface layer, a second surface layer and a core between the first surface layer and the second surface layer. The first surface layer comprises wood strands with a binding resin that comprises phenolic resin without comprising a pMDI resin and the second surface layer is comprising wood strands with a binding resin that comprises pMDI resin without comprising any phenolic resin. The lay-up is located in a press that includes a first platen facing the first surface layer and a second platen facing the second surface layer. The first surface layer contacts the first platen and the second surface layer contacts a screen. The lay-up is pressed and consolidated to form a consolidated panel having a smooth outer surface of the first surface layer and a rough outer surface of the second surface layer.

Abstract: An oriented strand board (OSB) panel is disclosed that has a first or smooth surface layer, a second or rough surface layer and a core there between, each layer composed of oriented strands and a the binding resin with the binding resin of said top layer being significantly different from the binding resin in said bottom surface layer and having properties that inhibit sticking of the panel to the adjacent press platen.