Wood is by far, the most popular choice of deck materials in the U.S. This is because it is long-lasting and the most economical. About 80% of pressure treated wood is Southern yellow pine, although other plentiful local species are used in some areas.

Grain patterns are prominent; its initial greenish color becomes a honey brown before fading to gray. It is available in nearly every lumber outlet in various grades and in common lumber dimensions plus 5/4 (spoken five-quarter) decking profiles. Tags stapled on the ends of lumber indicate the intended use, e.g., above ground or ground contact. Some dealers carry material that contains built-in water repellent or is re-dried after treatment.

The chemical preservative is forced into the wood cells under pressure. Pressure treated wood usually has a warranty against decay and termite damage, in most cases for the lifetime of the original purchaser. Preserved lumber is also used for fencing, landscaping, walkways, and other backyard projects.