Durock Under a New Install ?

[BillT]

Haven't posted in a while. Just wondering if Durock is still the best product out there for an underlayment for a new Woodstove install over a combustible floor.

I'm planning on a Ceramic Tile Floor, but want to put in the best material under it to achieve the proper R-Value required.

Thanks

 

[DAKSY]

That answer will depend on what the "NEW" woodstove is
& what the owners/install manual dictates.
Not all stoves are created the same.

 

[BillT]

I have an Englander 13-NC that requires a 2.0 R-Value under it.

 

[DAKSY]

1/2" Durock has an R-value of .200.
1/4" Ceramic tile is at .020.
1/2" NEXT GENERATION Durock is at .390.
So 10 sheets of Durock + the tile or 5 sheets of NG Durock + the tile...
You are talking a very thick hearthpad...

 

[BillT]

Yeah, that's what I had figured on the last time I checked into it, 5 Sheets of NG. Englander recommends Micore (sp) but I just can't find any locally.

Just wanted to make sure that there is nothing new out there I could use.

Having about a 3 Inch Riser is no problem. I think it would look good really.

Appreciate the info.

 

[axeman628]

Check the specs that came with the stove. Can you get a bottom heat shield?

My f400 requires an R-Value of 2.0 but with the heat shield the only requirement is that the floor be non-combustible. Made hearth construction a lot easier.

 

[BillT]

Side Shields were available and I have bought them. No Bottom Shields were, but I haven't checked with them in a while. I'll have to give them a call. Thanks for the suggestion.

Bill

 

[Highbeam]

Also consider the weight. That durock stuff was nearly 100# per layer.

 

[BillT]

Also consider the weight. That durock stuff was nearly 100# per layer.

I basically will need 3 X 5 Sheets. Weight listed is 38 Lbs per sheet.

 

[Highbeam]

I basically will need 3 X 5 Sheets. Weight listed is 38 Lbs per sheet.

That's lower than i recall. Much better.

 

[rwhite]

Yeah, that's what I had figured on the last time I checked into it, 5 Sheets of NG. Englander recommends Micore (sp) but I just can't find any locally.

Just wanted to make sure that there is nothing new out there I could use.

Having about a 3 Inch Riser is no problem. I think it would look good really.

Appreciate the info.

Sourcing Micore is tough. When I was looking for it everyone I talked to could order it if you needed an entire load. I learned that office cubicle walls are made from it and was able to find some for $5 each and just stripped them down. One thing I have learned since that endeavor is that it may often be cheaper to look at a more expensive stove with a lesser R-value that try and build a hearth to meet a higher R-value.

 

[rwhite]

You may be able to find a ready made hearth pad and just cover it with your choice of tile/stone.

 

[BillT]

Sourcing Micore is tough. When I was looking for it everyone I talked to could order it if you needed an entire load. I learned that office cubicle walls are made from it and was able to find some for $5 each and just stripped them down. One thing I have learned since that endeavor is that it may often be cheaper to look at a more expensive stove with a lesser R-value that try and build a hearth to meet a higher R-value.

Exactly how I found it to be when I researched it. The directions with the stove made it sound like it was at every other building material outlet, but as you have also found, it is not.

I also heard about the Office Cubicle Walls idea, but after calling all around locally, I found it to be more trouble than it is worth.

As far as another stove goes, I already have this one bought, delivered and in place. I did some thorough research on it and found it to be a real good choice for my application.

So far this has been the only drawback, but if no Bottom Shields are currently available, the 3 Inch Hearthpad will not be that much of a problem.

 

[BillT]

You may be able to find a ready made hearth pad and just cover it with your choice of tile/stone.

I did check into that too, but I believe one of the problems was that it is not recommended to be cut. I need the Hearthpad to be custom built into a corner.

Bill