Brick Wall with Drywall Behind = Combustible?

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JV_Thimble

Feeling the Heat
Sep 28, 2010
317
South-Central MI
Heard this when talking with a local dealer about possible clearances for a woodstove. I have a brick wall with drywall directly behind it. Dealer said that would mean the wall is considered combustible unless spacers are used between the surfaces and an air gap is present. Turns out there's 1/4" to 1" of airspace between them, so I assume I'm ok either way. However, I'm curious about the requirements for this, and wondering what the basis/spec might be for it.

Thanks in advance,

John
 
If there is no clearance reduction required from the tested stove requirements, then this is irrelevant. If some reduction is required then this would be considered a 33% reduction wall by the NFPA standards. Remember that this is the clearance to the drywall (the combustible) and not the brick. Here's the specs:

https://www.hearth.com/econtent/index.php/wiki/NFPA_Wall_Clearance_Reductions/
 
BeGreen said:
If there is no clearance reduction required from the tested stove requirements, then this is irrelevant. If some reduction is required then this would be considered a 33% reduction wall by the NFPA standards. Remember that this is the clearance to the drywall (the combustible) and not the brick. Here's the specs:

https://www.hearth.com/econtent/index.php/wiki/NFPA_Wall_Clearance_Reductions/

Perfect - many thanks. Will be nice to have this in hand if I need when discussing install options.
 
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