How do you install stovepipe through drywall?

[JA600L]

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.

 

[bholler]

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.

 

[Mt Bob]

Research wall thimbles to do it right.(broken link removed to http://www.rockfordchimneysupply.com/insul_flue.php)

 

[bholler]

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

 

[firefirefire]

BDM makes a listed piece for this application. Your nearest BDM dealer can get it for you.

(broken link removed)

 

[Rossco]

The ICC only requires 4" protruding through dry wall.

 

[begreen]

https://www.hearth.com/econtent/index.php/articles/passing_a_chimney

 

[JA600L]

Can roxul insulation be used in close proximity of the stove pipe?

 

[begreen]

Yes.

 

[JA600L]

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.

 

[BrotherBart]

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.

 

[JA600L]

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?

 

[chimneylinerjames]

Use a wall thimble or also called a wall pass-thru. These are UL listed to pass through combustible walls.

 

[firefirefire]

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

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.

 

[bholler]

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.

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

 

[JA600L]

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.