30' Stove Pipe Chimney Going Through 2 Floors

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Rusty Shackleford

New Member
Dec 3, 2021
4
South Dakota
I am going to be installing a stove pipe chimney in the house I'm building but not sure on some of the details. The chimney will be 8" and be a straight shot through 3 levels (2 floor systems and a cathedral ceiling). The pipe length inside the structure will be about 29' total. Will be burning pine in a Vermont Defiant. The pipe will not be inside a chase.

Do I need double wall or is single wall going to work just as well? Not sure on the pros/cons of each. Price for DW seems to be the big con. Not being a hazard to touch seems to be the pro for DW. Let me know if there is more to it than that. (I'm leaning against doing a full masonry chimney, but feel free to make a case for doing so instead of stove pipe.)

What sort of hardware do I need between floors and in the roof? I have excessive clearances built into the joist systems where the chimney will pass through, and will frame those in to fit whatever the required hardware is between floors.

I'm also looking for recommendations on where to buy the materials and preferred brands/product types.

20210728_143935.jpg
 

begreen

Mooderator
Staff member
Nov 18, 2005
93,171
South Puget Sound, WA
The flue changes to chimney pipe as soon as it leaves the room and stays chimney up thru the roof. The chimney pipe mustbe chased or protected in order to maintain the required 2" clearance.
 
Last edited:

bholler

Chimney sweep
Staff member
Jan 14, 2014
28,443
central pa
I am going to be installing a stove pipe chimney in the house I'm building but not sure on some of the details. The chimney will be 8" and be a straight shot through 3 levels (2 floor systems and a cathedral ceiling). The pipe length inside the structure will be about 29' total. Will be burning pine in a Vermont Defiant. The pipe will not be inside a chase.

Do I need double wall or is single wall going to work just as well? Not sure on the pros/cons of each. Price for DW seems to be the big con. Not being a hazard to touch seems to be the pro for DW. Let me know if there is more to it than that. (I'm leaning against doing a full masonry chimney, but feel free to make a case for doing so instead of stove pipe.)

What sort of hardware do I need between floors and in the roof? I have excessive clearances built into the joist systems where the chimney will pass through, and will frame those in to fit whatever the required hardware is between floors.

I'm also looking for recommendations on where to buy the materials and preferred brands/product types.

View attachment 286963
Stove pipe is not a chimney it is a connector between the stove and chimney. And it can't pass through any floor or ceiling. Once it reaches the ceiling it needs to change to chimney pipe and that pipe needs to be enclosed in any living areas. As far as hardware needed that is all spelled out by the chimney manufacturer. But basically you will need a support box at the bottom. A firestop at and passthrough. An insulation shield in any attic space. And supports as needed.
 

Rusty Shackleford

New Member
Dec 3, 2021
4
South Dakota
The flue changes to chimney pipe as soon as it leaves the room and stays chimney up thru the roof. The chimney pipe mustbe chased or protected in order to maintain the required 2" clearance.
What's the difference between a metal chimney pipe (sorry if my terms are wrong) and the flue?

Would a double wall pipe to the roof need chased or is the double wall suitable since it has 2" built into it?
 
Last edited:

bholler

Chimney sweep
Staff member
Jan 14, 2014
28,443
central pa
What's the difference between a metal chimney pipe (sorry if my terms are wrong) and the flue?

Would a double wall pipe to the roof need chased or is the double wall suitable since it has 2" built into it?
Double wall chimney pipe does not have the 2" built into it. You need 2" past the outside of the pipe. And double wall stove pipe can't pass through floors.
 

Rusty Shackleford

New Member
Dec 3, 2021
4
South Dakota
Stove pipe is not a chimney it is a connector between the stove and chimney. And it can't pass through any floor or ceiling. Once it reaches the ceiling it needs to change to chimney pipe and that pipe needs to be enclosed in any living areas. As far as hardware needed that is all spelled out by the chimney manufacturer. But basically you will need a support box at the bottom. A firestop at and passthrough. An insulation shield in any attic space. And supports as needed.
Sorry if my terms are wrong. Didn't realize a difference between chimney pipe and "stove pipe".

I just want to have exposed pipe running all the way to the roof. Can I do that all the way with double wall pipe or does even double wall have to be enclosed all the way?
 

Rusty Shackleford

New Member
Dec 3, 2021
4
South Dakota
Double wall chimney pipe does not have the 2" built into it. You need 2" past the outside of the pipe. And double wall stove pipe can't pass through floors.
Oh. I thought there were 2" between the 2 pipes inside a double wall chimney pipe for the purpose of getting that 2" clearance.

Is there an alternative to chasing a pipe through living areas? I frequently see exposed pipe (chimney or stove idk...) go up from a stove straight up through a cathedral ceiling 12' - 20' high.
 

bholler

Chimney sweep
Staff member
Jan 14, 2014
28,443
central pa
Oh. I thought there were 2" between the 2 pipes inside a double wall chimney pipe for the purpose of getting that 2" clearance.

Is there an alternative to chasing a pipe through living areas? I frequently see exposed pipe (chimney or stove idk...) go up from a stove straight up through a cathedral ceiling 12' - 20' high.
Stove pipe can absolutely run straight up from the stove to the ceiling. But it cannot pass through a floor on the way. Once it hits a floor it needs to change to chimney pipe and be enclosed. Now you could enclose it in a round metal chase but it is going to be 14" in diameter to allow 2" all around the outside of the 8” chimney pipe.