Wood-plastic composite (WPC composite, or composite Lumbar) is a hybrid material composed of 60% reclaimed timber, 30% recycled high-density polyethylene (HDPE), and 10% additives to create a high-quality product that can easily replicate the advantage of timber decking without any of the defects like fading, rotting or staining. Composite Decking is fast taking over from the traditional wooden type decking.