New Hearth, millboard and 28 ga sheet metal?

[dnichols822]

On the back of my wood stove it says the floor has to be of 1/4 inch asbestos mill board and 28 gauge sheet metal or equivalent. I wanted to know if anyone knows how many sheets of cement board is equivalent to this? I am laying porcelain tile on top of the cement board in case that matters? Thanks.

 

[begreen]

What stove is this for? The same Bullard in the other threads or a different stove? If the Bullard, I like making a sandwich of a couple layers of durock, then 28 ga metal, then another top layer of durock on which to lay the tile.

https://www.hearth.com/talk/threads/25384/

https://www.hearth.com/talk/threads/8650/

 

[njkev]

Asbestos Mill Board? How old is this stove?? Correct me if I am wrong, but I believe "asbestos" has been banned since 1977 for commercial use. I would personally look at 1/2" Micore 300. You need to know either the R or K-Value for your stove.
Kev

 

[dnichols822]

LOL, I thought it was banned as well. My house was built in 1985 so I assume it was not purchased new. That would also explain why I have no information on it.

 

[dnichols822]

I am building a new hearth and need "sheet metal". What should the sheet metal be made of? I found sheet metal made of aluminum and steel so far? What is the ideal metal to use inbetween cement board?

 

[begreen]

Steel sheet metal is pretty common so it's probably what I'd used but in this application, either is probably fine. Which is cheaper or easier to get?