I have a question regarding a hearth pad for my Hearthstone Homestead with 4" legs. As you know, the stove has a high R-value requirement (6.6). Since I can't make clearance to my mantle with the stove sitting on the current pad, I need to move the stove out a bit over the hardwood floor. This, of course, means I need to build a hearth pad that will protect my floor. Here's my current plan. I really appreciate any and all feedback. (By the way, taking down the mantle is not an option.) 1" (+/-) flagstone 5/8" Thinset 1/2" HardiBacker 1" fiberglass insulation 1/2" HardiBacker 1" fiberglass insulation 1/2" Hardibacker Based on my calculations, this will leave me with a hearth pad with an R-value of at least 7.44. I should also note I'm going to use specially cut pieces of HardiBacker immediately under the stove's legs to provide adequate support for its weight; this means Hardi-Backer will be stacked 3.5" ONLY immediately under the legs of the stove. Does this setup sound good to go? Based on what I've read on this site, I know some people prefer Durock, etc. over HardiBacker; however, HardiBacker was the best option I could find locally and I already purchased the boards. Thanks, in advance, for your guidance!