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Old 01-31-2012, 07:29 AM   #1
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pole building insulation question


we have a 30x40 pole barn structure that has a concrete floor. we have framed in the first 16 feet of this for a man cave so to speak. I am ready to insulate the room and put sheet rock up.

The building was insulated with a sheeting of sorts. does this insulation which is on the metal of the building need to come down in the area of the man cave before putting in R-13? Also I have a neighbor that insists on removing this along with installing a vapor barrier. I was under the impression that these are needed much more in the northern climates. I am in SC and was also under the impression that backed insulation is essentially the vapor barrier.

he has me concerned about condensation and moisture forming between the external insulation on the metal and the internal insulation for the frame.

someone educate me pleas

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Old 01-31-2012, 07:58 AM   #2
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pole building insulation question


Pictures are helpful in this case.

If the skin of the building is metal, you do have more condensation potential much like a steel roof over purlins.

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Old 01-31-2012, 08:02 AM   #3
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pole building insulation question


maybe this one will work. You can see the sheeting insulation on the far wall.



better pic of the insulation


definitely a metal skin
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Old 01-31-2012, 09:03 PM   #4
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pole building insulation question


anyone?
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Old 02-01-2012, 08:42 AM   #5
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pole building insulation question


It appears that the skinned insulation has a vapor retarded applied to it (i.e. something like a poly skrim insulation).

Is the exterior insulation fiberglass, foam, etc?

If there is an exterior vapor retarder, you need to make sure that you do not use and insulation that would form and vapor retarder (more than Class II) to the interior side. Two vapor retarders on either side of the wall is a recipe for disaster because it won't allow the wall to dry out if it gets wet.

Can you tell me more about the insulation on the outside wall?

Are you going to stud out the interior wall? If so, you could apply an EPS foam board between the stud wall and the exterior wall (depending on how the wall will be framed) and use an unfaced/unbacked R-13 batt. I would recommend that you use something like roxul or mineral wool instead of fiberglass.

This will give you the added R-value and allow the wall to dry to the interior if it needs to.
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Old 02-01-2012, 08:57 AM   #6
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pole building insulation question


I have a call in to the company that built the building to get more clarification on the insulation. It is a sheeting that was on a roll that I think they glued into place but can not be positive about that.

My limited knowledge on insulation, I had planned to just go with an R-13 between the studs. It is currently studded out and ready to go. Studs are in place on 16" centers and everything is locked down.

Thank you for the information
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Old 02-01-2012, 09:03 AM   #7
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pole building insulation question


R-13 batt with and air tight interior wall (i.e. make sure you foam and seal around the outlets, baseboard, etc.
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Old 02-01-2012, 09:16 AM   #8
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pole building insulation question


so an unbacked R13 mineral wool or roxul correct? Do not remove the buildings exterior insulation. And seal everything.

There are interior walls involved, should I apply the same insulation there or just go to a normal R-13 fiberglass?
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Old 02-01-2012, 09:50 AM   #9
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pole building insulation question


Yes.

Un-backed.

Inside walls (walls between conditioned spaces) don't really require insulation unless you are worried about noise.

If it is between conditioned and unconditioned space, yes...you need to insulate.
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Old 02-01-2012, 11:15 AM   #10
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pole building insulation question


Let me know if I should start a new thread. Donít ask for pix, I tried, too large to send.

Any way I have a 30 x 40 poll barn 2 stories, the second story is wood stick frame construction insulated and drywalled.
The lower is standard poll barn in general, steel over OSB. The inside lower is standard poll barn. The question is what type of insulation (with or without vapor barrier) would you suggest.
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Old 02-01-2012, 11:18 AM   #11
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pole building insulation question


just heard from builder, they say its Solar Guard with vapor barrier, comparable to R-11.

Assuming I should proceed as earlier stated.

Hardway, no issues with me. Feel free to leave it here or create new, up to you
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Old 02-02-2012, 06:42 AM   #12
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Yes.

Same as above.
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Old 02-12-2012, 10:38 AM   #13
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pole building insulation question


Can not find 23" roxul r13. Any reason not to use r15?
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Old 02-12-2012, 06:51 PM   #14
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Should be fine.
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Old 03-14-2012, 10:57 AM   #15
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pole building insulation question


I have almost the exact same setup as you. 30 X 50 pole building with double bubble insulation around the walls and roof.

I am also trying to set up a man-cave in here. I am framing in the walls and putting up R-13 insulation in them. I was wondering what you are doing for the ceiling since there really isn't enough to attach drywall to right now they way it was built. I was thinking of putting up some sort of drop ceiling with ceiling tiles in it. Would that work? How do you put up insulation above those? Does the insulation just lay on top of the ceiling tiles?

I'm pretty much a newbie on this stuff, so I appreciate any suggestions you can provide.

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