RDI provides outdoor railing solutions that feature style, performance and durability and safety in all of our products. And with a vast range of code compliant safe railing options such as aluminum, vinyl, Resalite® premium composite, and steel railing. RDI is the perfect choice for homeowners, contractors and architects. RDI is the number one vinyl railing manufacturer in the US and the leading innovator of low-maintenance, easy to install, quality railing systems, porch post systems, and complete accessory lines.