Redwood and cedar utilize their natural decay and rot resistance and take paint and stain very well. They are a bit more expensive and harder to find. Redwood and cedar are great for those averse to using chemically treated materials but still want the look and flexibility of real wood. Composite decking consists of real wood fibers mixed with a plastic resin. While composites cannot be stained or painted, they are available in many natural shades and hold their color for years.
Composite material is intended for decking only.
Real wood is still required for structural members. Costs run about double the price of pressure-treated pine but a deck build with composite materials can last a lifetime and is maintenance free. Extruded plastics are the new kid on the block. Made from polyethylene, this material has a wood-like look and feel. A blind fastening system eliminates the unsightly screw heads seen on most decks.