WPC is made of a mixture of materials consisting of wood and recycled plastic. It has a nice appearance that resembles real wood and requires little maintenance, which makes it a great alternative to other types of decking. WPC is the abbreviation for wood plastic composite. WPC decking is the fastest growing wood deck alternative on the market. It boasts low maintenance and a much longer lifespan than wood decking. WPC decking is a man-made building product that includes an approximate equal mix of recycled wood fibers and recycled plastic.