Thank you. Great suggestion! I've been a little weary about using a fire pit on the deck for this exact reason, especially since it's composite and not wood. I hadn't thought of bluestone...sounds like it mayb be a cheaper solution than this thing http://www.amazon.com/Deck-Protect-Fire-Pit-Combo/dp/B0043BHTYC/ref=sr_1_1?ie=UTF8&qid=1451574573&sr=8-1&keywords=fire+pit+deck+protector