Wood Plastic Composites - A Primer - University of Tennessee ...wood plastic composite is a relatively new material that has many potential uses. The markets for WPC decking lumber have been expanding recently and new applications are being pursued. Door and window components, deck handrails and fencing are other mar- kets for the WPC industry. The flexibility of manufacturing methods and product performance attributes provide the potential for a variety of new markets. This publication is intended as an introduction to wood plastic com-.