Composite decks are the most expensive option and require the least amount of maintenance. The structure is pressure treated wood and the floor, railings, and fascia are composite. To maintain a composite deck, simply wash it off with soap and water when needed. One of the main things that dictates the quality of a composite deck is the material. Here at LDFCo, we use high-quality composite materials. The support posts and beams can also be covered with composite material as an additional option.