Several shortcomings still exist in mostWPCsused as a substitute of solid wood. The problems of heavy weight, low ductility, low impact strength, poor nailing and screwing ability and high flammability have limited the use of WPC in many applications . Many of these drawbacks can be remedied by incorporating a blowing agent in the WPC. In fact, foaming WPC can lead to many advantages, e.g. lower material consumption and better insulation