How Flammable Is Trex

Trex decking is classified as a Class C, or Class III, building material. As a result, Trex lumber will burn as wood does, even though it contains several other composite materials. … So if a fire occurs, your Trex lumber will burn just like the wood on any traditional wood deck.

Can you put a fire pit on Trex?

The fire pit is not installed on top of the Trex decking. … Wood burning fire pits are not recommended on top of Trex decking unless using a product called DeckProtect™. Wood burning fire pits can damage the decking due to the extreme heat from the bottom of the fire pit and/or burning embers “shooting” onto the decking.

Is composite decking fire resistant?

Composite Boards Decks are where fires often start, whether from windblown embers or from charcoal falling out of your grill. Most wood species are rated Class C for fire resistance, but you can build safer with a Class A–rated composite decking like AmeraDeck, made from PVC and wood fiber.