I finished my hearth pad today and it fits perfectly. I put a layer of Durock over 1/2" plywood and then used 6x6 slate tiles. Finished the edges with some stained oak trim. All in all just over $100 in materials. Of course I splurged for a new tile saw for use on some other projects I've got planned. All I need now is my stove and pellets and some cold weather.