Originally Posted by quiltyfeelings

Thanks for your sweet comments. It's made of pre-treated plywood. I also used pre-treated 2x4's on the edges to help keep it from warping. It is 6' x 6' and weighs about 150 pounds! I primed it well using exterior primer. I used exterior paint to paint it and put several coats of a sealant on the top. Hope this is helpful.