I am finally getting back to work on the fireplace. I have been sheetrocking and everything else. I am putting the wonder-board on the front. I need to make a cardboard template for the top of the fireplace on my last piece. I was wondering if I should also concrete board the front of the hearth? I am pretty sure I am going to use the cultured stone lowes sells that they carry in stock.Its a dry stack that says you can glue it to wood or concrete board. But was wondering if I needed the front and sided of the hearth covered to be safe or is the way I got it ok?I also bought the high heat caulk to do the seams when I get the rest of the board on.Here is a shot of the addition and one of the fireplace where I left it tonight.