hardie board

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    Heat barrier questions

    I'm installing a hearth pad and a wall barrier for my new (old) Vermont Castings and have been unable to find answers to a couple of questions. For the pad, I plan on using 1/2" Durock or Hardie board on top of 1/2 or 3/4" plywood or OSB on a 2X6 frame. I've read that you should use mortar and...