PureWood. Like indoor flooring, PureWood Porch Flooring features a tongue-and-groove design. The 1-by-4-inch boards are available in 8-, 10- and 12-foot lengths. Created in a thermally modified wood process that tempers the wood at a cellular level with heat, moisture, and time, PureWood resists rot and decay without adding chemicals or metals. The material is dimensionally stable and can be handled like any other natural wood. 816.581.6190. www.purewoodproducts.com.