The benefits of going to composite decking over treated wood. Composite deck boards are designed to look like natural wood board while keeping the initial beauty for years after the product is installed. The composite material has enhanced UV properties to keep its original color. Doesn't warp or cup like treated boards can do .WIth the hidden fastening system, there its beauty from not having to see nails or screws on the face of you deck boards. No more nails popping up and being a tripping hazard.