Composite decking is exterior deck board made from a combination of organic material and plastic. Developed in the early 1990s, composite decking has experienced significant growth in the building industry and is used on residential decks, waterfront docks, and commercial boardwalks. Many manufacturers produce composite decking products with several new products appearing each year, often with different material combinations.

Structural composites are engineered products made from plastic, wood, glass, or carbon fiber materials. The formed or extruded products have applications as outdoor deck floors, railings, fences, landscape timbers, cladding, siding, moulding, trim, and window or door frames. These low maintenance products are resistant to cracking and can be smooth or have a simulated wood grain. Available in a variety of colors and sizes, structural composites are shaped using typical woodworking tools.