The lifespan of wood is limited when it is used at outdoor applications. You have to treat your wooden decking periodically and apply chemicals. In time the screw heads pop out. Moisture makes the wooden surface slippery.
Not only the cost at the beginning with the installation of wood deck, but in the long run, required maintenance as well would generate an extra cost. In this perspective, TherraWood® decking systems stand not only durable, but also highly-cost effective solutions for needs.