I have a Kent wood burner with the tile sides. I bought it from my uncle who picked it up at a farm auction. Awesome little stove! It came to me without the tiles in the sides and no fire brick inside. My uncle told me I didn't need fire brick inside, but I wonder if I should line it. Haven't noticed any warping, and have been using for years. Please give me some advice! My second question is about the exterior tiles. I originally used two ceramic tiles I had laying around from an old job. Just cut two tiles to fit the side, and it worked fine for years. Recently I noticed one tile was cracked. I stopped burning, and took all the tiles out, replacing with a solid tile cut to size of the side. It is porcelain floor tile, 3/8 of an inch thick. It has already cracked on both sides. What is the recommended tiles to be used, I.e. size and type? I've seen a few pics on here of the stove but can't tell what the tiles are. Thanks a lot.