Decks offer almost unlimited possibilities for outdoor dining, recreation, and entertainment. Whether they are single level or multi level, ground level or elevated, wood or composite - they offer the easiest way to extend your living space. Decks can be combined with patios to provide functionality - with stairs to ground level - the best of both worlds. Decks are exposed to rigorous conditions year round - the scorching sun of summer and the freezing cold of winter. To survive these elements, decks require a treated lumber, composite, cedar or other naturally rot resistant wood - or some combination.