Looking for best suggestions. 6x8 building with exterior going to be tin. Will have a place to put a window unit when not smoking.
Not looking to get the temperature above 200 for sure.

Any suggestions that are not too terribly expensive?

I love spray foam but I can't find any data that suggests spray foam could hold up to your 200F smokehouse temps.

I would go with mineral wool. It's basically lava run through a cotton candy machine so it should hold up well to your milder temps.

Is this something already built?

How about cinder block? Or even a combination of cinderblock and wood.

In a mild climate, the cinder block might be a great insulator all by itself. In a really cold environment you could put anything from dirt to concrete in the hollow spaces.

If this is a temporary/seasonal thing, you could drive some stakes for support and then take down and stack up the blocks out of the way to get your space back and just look nice when smoking season is over.

lb3 said:

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I love spray foam but I can't find any data that suggests spray foam could hold up to your 200F smokehouse temps.

I would go with mineral wool. It's basically lava run through a cotton candy machine so it should hold up well to your milder temps.

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I would use mineral wool, but I would try to isolate it from the food/smoke. I know for a fact it won't burn, but I wouldn't trust it around food at 200 degrees. The binders that hold the batts together are a wildcard.

It is a permanent structure. Have the slab poured already.

That was my next concern. If I OSB the inside, will that be enough?

You could make a crude frame and have a wall cavity with tin and have the mineral wool in the cavity. It doesn't really have to support anything. Its double the tin but it wont warp. I would be worried OSB would warp really bad over time in that environment.

Trying to isolate the Rockwool to keep chemicals away from food but using OSB for the isolation seems like you're causing the same chemical concerns with a different material.

chickencoupe16 said:

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Trying to isolate the Rockwool to keep chemicals away from food but using OSB for the isolation seems like you're causing the same chemical concerns with a different material.

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Yeah...

I'm seeing a bunch of them framed in cedar with no insulation in them. Maybe whatever cedar you can get for a reasonable price like fence pickets or something like that,...

TMoney2007 said:

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chickencoupe16 said:

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Trying to isolate the Rockwool to keep chemicals away from food but using OSB for the isolation seems like you're causing the same chemical concerns with a different material.

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Yeah...

I'm seeing a bunch of them framed in cedar with no insulation in them. Maybe whatever cedar you can get for a reasonable price like fence pickets or something like that,...

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I hope username checks out!

Mineral wool should be fine as far as temps go...I've used that to insulate a smoker, although the inside was lined with sheet metal.

"Building a smokehouse" and "so tight on cash I can't afford cedar fence pickets" probably shouldn't be coexisting within the same person.

I said not terribly expensive.

Didn't say anything about tight on cash for cedar.

If that's the best option, I will consider it.

I'll just say I'm glad someone else does projects like me. Pour the slab, then plan the construction. Good thing is my wife never asks me to make her anything because she doesn't want to wait a year for it.