Hello all, I would like to get some input please, "have a tendency to get arguments started" but here goes. I'm building a corner hearth for my Fisher baby bear which will be installed in spring; as per the pictures the frame work is 2"x 6" and the plywood is 3/4". Its all glued and screwed together, now here's where I will ask the experts, "all of you" the next question? 28 gauge sheet metal next? durarock next? then tile? "I wanted to do a nice sand stone tile design" Insulation under the framing? leave the air space? I'm reading to much conflicting things. My frame work will be sitting on a hard wood floor, floor joists are 2"x 12"s no worries there. Any way, I would like to here all suggestions please Thank you! Dave.