Composite Lumber
Wood fibers and plastic combine to make a superwood that endures the elements
Plank for plank, composite beats out natural wood in all but two ways: the initial cost of the material is higher, and it has a plastic appearance. On the plus side, it comes in a variety of colors and finishes, and it is built to last over decades of harsh conditions without staining or sealing. Composite lumber is often used for decks, primarily because it is more durable and requires less maintenance than one made of true wood. The combination of wood fibers and plastic makes a plank that is stronger and denser than wood. Composite lumber is also resistant to rotting, warping and wood-destroying insects.
This image is a top-down shot of composite decking; there is a wood grain stamped into the planks, which adds slip resistance. The ingredients of composite lumber are wood fiber and plastic, with a bonding agent or glue.
Here is a great visual comparison. The ceiling of this roof deck is true wood, and the deck below is composite. The composite deck is made from wood fibers but lacks the character of true wood.
When large spans of deck are covered with colorful rugs and attractive outdoor furniture, one doesn't notice the artificiality of the deck material as much.
Some composite decking has a wood grain brushed onto the surface to give it more of a natural wood appearance.
Composite decking cuts just like lumber but does not need to be sanded, stained or treated. An inlay has been added to this deck with two colors of composite lumber.
Composite works well in high-traffic areas and lasts longer than wood because it is moisture resistant. Moisture makes wood split and rot, and makes the wood more susceptible to mold and insect damage.
Composite lumber can also be used for railings and other garden structures that are typically made from wood.