years. These products are usually made from a combination of non-wood materials such as polymeric resins, fiberglass, stone, sand, and fly ash and are chosen for their durability, curb appeal, and ease of maintenance. Given the newness of such technologies, product lifespan can only be estimated, varieties are limited, and distribution is sporadic. See also Sod house Log building Exterior insulation finishing system Stucco Masonry Brick Concrete masonry unit Dry stone References Building materials Types of wall Building engineering Timber framing