- The 40x40mm WPC joist is a durable and compact substructure designed for composite decking systems. Made from high-quality wood-plastic composite, this composite decking joist offers excellent strength, weather resistance, and low maintenance. Ideal for patios, walkways, and outdoor flooring, the WPC substructure ensures stable support and long-term performance. Its square profile makes it easy to install and perfect for tight or low-clearance decking projects.
Fast Shipping
Consectetur adipiscing elit. Ut elit tellus, pulvinar dapibus leo.