The salient features of Lauan-Polystyrene Composite using monomer emulsion, as it differs from composite using pure styrene both on the distribution of polymer in wood and mechanical behavior of products, are discussed. Wood reinforcing is achieved by loading styrene emulsion and pure styrene and by subsequent thermal polymerization. Uniformity of polymer in wood is discussed in connection with specific gravity variation, and mechanical properties are also determined. It appeared that monomer emulsion played an important role of enhancing both the uniformity and mechanical strengths.