Composites are the fastest-growing area of wood products for housing and industrial applications. Most wood composites are a substitute for a solid wood product. The raw materials for wood composites include a wood base (fiber, particle, strand, or strip) combined with various adhesives, waxes, or other nonwood materials to produce a panel or lumber product. Both wood composite panels and composite lumber products can be used for structural or nonstructural purposes, depending upon the end use for which they are manufactured. Structural applications are those with specific strength requirements, such as wall sheathing, framing, decking, and flooring. Nonstructural applications involve the use of wood composites as substrates for decorative overlays, moldings, window and door parts, and other nonload-bearing uses.