9 mighty woods for outdoor projects
Rot proof composites
Wood/plastic composites (WPCs) are made from thermoplastic resins, wood flour, and wood fiber. Some make use of recycled material, but all are rotproof. Composites have no defects, and do not compress like wood. This density poses special problems for fastening and movement. Solid composites, shown right, have greater expansion and contraction rates, especially along their lengths. They heat up in sunlight, and don't absorb paint and stain. Also, they lack rigidity. However, they don't splinter and offer good traction in wet conditions.
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