Hearth Construction 101 for Fisher.

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.

I don't know anything about Fishers need for CtoC, or hearth requirments, but no way shape or form would I do that.

just as a matter of tile support (stoves make for a very high point load), you would want 2 layers of 3/4, preferably fire resistant plywood, then the durock, then the tile. That's just regarding properly supporting the tile... I'll have to review my copy of NFPA211 for the rest of it

What does the Fisher manual say about hearth requirements?

You need to know what the factory clearances are (front, left/right and back), and what the R requirement is for the hearth before you build it. They are generally on the metal panel on the stove, or in an installation guide. No metal needed, use Micore 300 over the deck and then Durock Next Gen screwed to the decking and then tile over the Durock NG using thinset. That will give you an R value of 1.44 using one sheet each of half inch Micore and Durock.

Thanks all so far, I have the side and back distances covered, it's a old, 78-79 Fisher baby bear, no UL plate on it. Anyway I got all things figured out for the most part, just the rest of the base. It's a very small and light stove, weighs about 275lbs. I have a Grandma I'm burning in my down stairs, on a brick hearth I built years ago, I built the wood hearth because this stove will be sitting on a wood frame floor, not brick. And getting under the house to reinforce the joists to make a brick hearth would be "very difficult".
Thanks all.

Thank you Bret, As I'm seeing I may do a double durock layer.

Thanks Begreen, I did just that! he is the guru