LifeTime Lumber is an easy to use wood-alternative that is green, fire resistant and affordable. LifeTime Lumber weighs in at 25 percent lighter than other lumber composite products, is naturally fire-resistant and cost-effectively meets the strictest fire codes. LifeTime Lumber is a unique, eco-friendly composite lumber made from mineral ash and urethanes and contains no wood. Ideal for building decks, docks and fences, LifeTime Lumber offers the aesthetic attributes of wood, while solving the problems of degradation, weathering and perpetual maintenance.