I have 2 grills and 1 griddle on my new deck. I protected the deck with an All Things Barbecue grill mat under each one. I got 2 large ones and 1 medium. They are protecting my deck from oil and fire. Well oil, anyway, since I have never had a fire under any of my grills. They are all a bit dirty from the dreaded yellow snow here in the south, but they are still doing their job. My one small complaint is they are still sticking up a bit on the edge that was rolled on the inside of the box they came in. I hope they will finally lay down after the warm summer weather hits here in the next week or two.