Trex Elevations is manufactured of dual-coated, galvanized steel, which offers superior aesthetics, durability, longevity and stability when compared to traditional wood substructures. In addition, the product does not warp, twist, split or decay, allowing contractors to benefit from reduced callbacks and increased homeowner satisfaction. As the material is easy to cut and easy to build, it’s also more efficient and cost-effective for professionals to specify than pressure-treated lumber.