Fire Pit On Trex Deck. You could always check the instructions that came with the pit, if you have them. Won't rot, warp or splinter.

I would create a nonflammible surface for the fire pit to sit on. I considered building a traditional brick fire pit on a concrete footing, but that's no small undertaking or expense. When you build a trex deck for your northern virginia home, you can add other outdoor living elements like lighting and outdoor fire pits.
This is the first trex deck that i've done.
Its a gas fire pit, i don't see it leaving the pit. Rated 5 out of 5 by cliff willis from lpg fire pit we absolutely love this fire pit on our deck & when camping. I would like to build it on top of the deck. Use the deck protect fireproof pad under your fire pit to protect it from extreme heat and burning embers.