Is Trex plastic?

Trex is not just plastic. It is a wood-plastic composite and benefits from the best attributes of both materials. The plastic provides rot and insect resistance and the wood gives it density, pigmentation, and a natural look. Trex fencing components are also much thicker and more resistant to damage than plastic fences (typically called vinyl or PVC fencing).

Check out the differences between Trex and Vinyl for a more in-depth comparison.