I have a metal barn that I’m installing a wood stove in. I’m going through the side wall with the thimble and 6” pipe.
Does the hole need to be any larger than just enough to pass the pipe through?
There will be no combustible within at least a foot of the double wall pipe.
I would like to seal it up as much as possible and don’t see a problem with the metal wall being close.
Am I wrong?

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“Look life in its iron face”

The thimble should have instructions on how close it can be to combustibles.

I heated 36 years with only a wood stove, the flu pipe was a 1" Metalbestos II that was insulated and had only 1" of clearance and no thimble required.

Go with the instructions, and everything will be fine! Do it any old way and turn your barn into a pile of charcoal!

Ivan

It’s not the combustibles that I’m thinking about. I have clearance for that but I was wondering about the metal wall and pipe clearance. They don’t really talk about that. Does that mean it’s no problem? 6” pipe, 6” hole
BTW, it’s an insulated double wall pipe

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“Look life in its iron face”

If you go a little over 6" for the outside dimension of the double-wall pipe, there is high temp RTV Sealant you can put around the pipe, mainly to seal incoming air. Only thing I'd worry about would be combustibles around the wood-burner. FOLLOW ALL INSTRUCTIONS!!!
BTW, I may be wrong but I thought they made triple-wall for wall penetrations?

I forgot to mention, do you plan to maybe, in the future, to insulate the metal walls? Metal is a very poor insulator.

I would think you'd be fine.

I wrapped some of that door rope around the pipe with a polished stainless band against the wood and no problems for years so far...knock on wood.

HA!







BTW, the charcoal looking wood around the pipe was before I decided to wrap the rope around the pipe.

I’d leave a little clearance around the pipe just for expansion,though it shouldn’t be much. Any studs or stringers within a foot of the single wall need to be shielded though.

I run a wood burner in my barn and in my house. Whenever stove pipe needs to go through a wall, ceiling, or roof, I use triple wall stove pipe (some folks refer to it as 'all fuel' pipe).

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SIC SEMPER TYRANNIS

This has a good chance of burning or discoloring the paint on your wall if it is painted. Also, if your pipe isn't stainless steel and just black pipe you'll probably get rust on the outside of your wall.
You'll also need to be sure you get your pipe high enough. Sometime if the top of the stove pipe is lower than the peak of your roof you'll get a down draft. That all depends of the direction of the wind.

I was wondering about discoloration with the outside paint but that will be behind the outside thimble anyways and I’m hoping since it’s stainless, insulated double wall it won’t pose a problem.
And yes, the barn’s already insulated

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“Look life in its iron face”

If you are running double wall wood stove pipe out the side wall, codes say it should be in an insulated box and terminate 2' higher than anything in a 10' radius of the roof. Once you have DW pipe you cannot revert back to single wall.

Is there a reason you're not going straight up? IME it will vent better.

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Front sight and squeeze

I want no holes through the roof. The pipe is double walled insulated stainless from the chimney connector on the inside thimble to the chimney cap. Single wall inside.

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“Look life in its iron face”

I don’t know what I was thinking but my question is irrelevant since I have to make the hole large enough for the whole thimble anyways, which is bigger than the actual pipe.
I tried to overthink it and missed the obvious.
That’s happened before!

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“Look life in its iron face”