Federal Way, Washington, USA, 31 March 2008 -— Weyerhaeuser Company (NYSE: WY) today announced it is exploring the sale of its oriented polymer composites (OPC) technology. The OPC platform represents an advance in the technology used to create wood-plastic composites for exterior building products.

Weyerhaeuser’s proprietary OPC technology is supported by several United States and foreign patents and patent applications. This technology is used to generate an oriented, low-density product with woodlike appearance from virgin and recycled plastics.

Weyerhaeuser’s initial business plan for the technology platform focused on the high margin exterior trim market, with a secondary product offering in fencing. The company’s research indicates the technology also can be used for decking and related products.

Weyerhaeuser Company, one of the world's largest forest products companies, was incorporated in 1900. In 2007, sales were USD 16.3 billion. It has offices or operations in 13 countries, with customers worldwide. Weyerhaeuser is principally engaged in the growing and harvesting of timber; the manufacture, distribution, and sale of forest products; and real estate construction, development, and related activities. Additional information about Weyerhaeuser's businesses, products, and practices is available at http://www.weyerhaeuser.com.