How do you install stovepipe through drywall?

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JA600L

JA600L

Minister of Fire
Nov 30, 2013
1,288
Lancaster Pennsylvania
I am doing a basement insulation project with 1 1/2 foam board and half inch drywall. I was going to build a hearth but I decided not to.

What is the proper connection for a stove pipe to liner going through drywall, foam board, and block wall crock?

The foam board is kept 12" from the pipe. I will be using double wall stove pipe.
 
I would keep it 18" away and make a sheet metal cover plate. I say 18 because at some point the liner will have to be exposed and it is singe wall.
 
most thimbles are going to be to thick for his application sure you can cut them down and throw half or 3/4 of it away but he already has a noncombustible wall he just needs to keep his combustibles away
 
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The ICC only requires 4" protruding through dry wall.
 
Can roxul insulation be used in close proximity of the stove pipe?
 
Yes.
 
Is there any recommended clearance? I imagine that it would be fine as long as it doesn't touch.

They call it non-combustible, but then they use the term fire resistant.
 
It won't burn. I have it stuffed around my chimney liners. It will start getting soft around 2,000 degrees. But you will be watching from across the street by then.
 
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I believe you.

My idea is metal studs , roxul, and durock to be used around the pipe. This would keep my combustibles 24" from the 8" crock which will hold a 6" liner.

The code reads 3 times the diameter of the opening needs to be kept from combustibles. Am I correct?
 
bholler said:
most thimbles are going to be to thick for his application sure you can cut them down and throw half or 3/4 of it away but he already has a noncombustible wall he just needs to keep his combustibles away
Click to expand...
Not if the proper parts are the ordered. Insul-flue can be used as a through the wall application (two wall units and one thimble), or a to the wall application which the op is asking about which is one wall unit and one thimble.
 
firefirefire said:
Not if the proper parts are the ordered. Insul-flue can be used as a through the wall application (two wall units and one thimble), or a to the wall application which the op is asking about which is one wall unit and one thimble.
Click to expand...

Yes but he only needs 2" and all of the thimble kits i have used are made for at least a 2x4 wall. Yes it would work but they are not cheap and i think the idea of metal studs roxul and backer will be much cheaper and will work just as well. I have installed many thimble kits from many different companies But those are usually used to go through a framed wall which is very different that the original posters situation
 
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Thanks , Bholler for your feedback. I understand that studing out 2x4s is the way most people would do this, but I want to keep this project at 2". The room would get really small quick if I used foam, 2x4s, and drywall.

The 1 1/2" foam board with furring strips is a pretty slick setup to do this. Owens corning insul pink is the product I am using. Roxul and metal studs in the stove pipe area.
 
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