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. Properly installed, extruded decking looks amazingly like hardwood flooring. You will however pay a premium for this look and finding a qualified and experienced contractor can be a challenge. Because the material contains no wood products, extruded plastic decking will not rot and is perfect for areas subject to moisture like pool decks and boat docks.