What Is Plastic Lumber Called?

What Is Plastic Lumber Called? Plastic decking (also known as PVC decking) is lumber made from 100% plastic. What is the name of plastic lumber? Fiber-Reinforced Plastic Composite Lumber. High-density polyethylene (HDPE) and fiber-reinforced plastic (FRP) composites are two of the most common plastic-based lumber alternatives available today. Both materials are manufactured using recycled plastics,