slate tile hearth

[raybonz]

Can anyone tell me the R value of slate? Im trying to figure out what to do for a floor hearth too. Does anyone know if lowes or Home depot carry micore? Otherwise I gotta stack wonderboard. Stove Co. said I need R1 under stove. I have no clue except my wife doesnt want a raise trip hazzard. Thanks

Slate has no R-value for the purpose of inspection so all your R-value will be based on what's beneath it.. You will need 2" of Durock cement board to satisfy the 1.0 R-value.. Someone here was selling Micore and that might be an option for you..

Good Luck!

Ray

 

[firefighterjake]

Can anyone tell me the R value of slate? Im trying to figure out what to do for a floor hearth too. Does anyone know if lowes or Home depot carry micore? Otherwise I gotta stack wonderboard. Stove Co. said I need R1 under stove. I have no clue except my wife doesnt want a raise trip hazzard. Thanks

According to one table I've seen . . . one inch of slate = .1 (point one) for a R value . . . since most folks using slate would be using 1/2 inch or 1/4 inch tile you would have to divide the R value posted accordingly . . . in other words . . . slate doesn't offer much for a R value and you would need several layers or one thick slab of it to meet a R value of 1.

 

[robertjp]

Does anyone know if there is a special heat grade adhesive for porcelin tile? I scrapped the slate idea now am going porcelin. Thanks

 

[firefighterjake]

Does anyone know if there is a special heat grade adhesive for porcelin tile? I scrapped the slate idea now am going porcelin. Thanks

I think most folks just use a modified latex thinset like Flexbond . . . porcelain tile doesn't have a whole lot of R value either though . . . something that you may or may not know already.

 

[KB Baybee]

Hello all, been really enjoying this site for a while, however this is my first post, probably many more to follow. I also am assembling a slat hearth for the new stove being delivered tomorrow (free standing Regency f2400 with pedestal base). My question is do i need cement board under the slate tiles, was told plywood was sufficient. My present arrangement is cement floor, plywood, 1/2 inch slate on top.

 

[raybonz]

Hello all, been really enjoying this site for a while, however this is my first post, probably many more to follow. I also am assembling a slat hearth for the new stove being delivered tomorrow (free standing Regency f2400 with pedestal base). My question is do i need cement board under the slate tiles, was told plywood was sufficient. My present arrangement is cement floor, plywood, 1/2 inch slate on top.

If your stove requires ember protection only I would advise at least one 1/2" layer of Durock under that tile for a rigid base for the tile plus a seam free fire resistant barrier above the plywood.. Two layers with staggered seams would give even better protection.. What does your stove manual say it needs for protection?

Ray

 

[My Oslo heats my home]

Hello all, been really enjoying this site for a while, however this is my first post, probably many more to follow. I also am assembling a slat hearth for the new stove being delivered tomorrow (free standing Regency f2400 with pedestal base). My question is do i need cement board under the slate tiles, was told plywood was sufficient. My present arrangement is cement floor, plywood, 1/2 inch slate on top.

Just from a construction sense, the thinset will most likely need a backer of some sort. Plywood is not sufficient over time.

 

[KB Baybee]

Hi Ray, thanks for the input, was out doing just as you suggest, replacing the plywood with cement board. Guess it was a redundant question. Got it all in place, but the tile seems to have a little movement, they are 18in by 12in wide and am hoping the weight of the stove will settle them down, as they seem strong and are not flaking. I'll let you know how it goes. Crossing my fingers, thanks again, KB.

 

[raybonz]

Hi Ray, thanks for the input, was out doing just as you suggest, replacing the plywood with cement board. Guess it was a redundant question. Got it all in place, but the tile seems to have a little movement, they are 18in by 12in wide and am hoping the weight of the stove will settle them down, as they seem strong and are not flaking. I'll let you know how it goes. Crossing my fingers, thanks again, KB.

Good luck with the hearth KB! I posted how I built my hearth along with lots of pics on this forum.. There are others here that do much better tile work than I do but it is strong.. Be sure to thinset all layers and post progress pics as we love pics here

Here is my hearth project:

https://www.hearth.com/talk/threads/75732/

Ray