Insulating a pole building - advice

mikeathens Posted By mikeathens, Nov 26, 2008 at 7:56 PM

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  1. mikeathens

    mikeathens
    New Member 2.
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    Jan 25, 2007
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    Athens, Ohio
    I am trying to figure out the best way to insulate my pole building (I guess not technically a pole building, it's framed). It is 24'X48', 6" concrete floor, 9' ceiling, 4/12 pitch metal roof. Trusses are spaced 4' OC, and wall studs are 2X4, 2' OC spacing. 1x6 (oak) board and batton siding.

    I want to section off the rear portion of the barn, so I'll have approximatley 20'X24 framed in.

    The question is: What's the best way to insulate this? I am thinking R-13 fiberglass encapsulated in plastic (I can't remember what this stuff is called) for the walls. The ceiling is my big concern: the metal roof will drip on the inside as it is; when I heat this space, it will be a rain forest.

    Should I slip 1.25" thick beadboard between purlins so it's against the metal on the underside of the roof, and then insulate the ceiling with fiberglass as nomal, or is there a better way to do this that will prevent condensation from dripping off the metal?

    I want to do this right the forst time...
     
  2. JustWood

    JustWood
    Minister of Fire 2.
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    Aug 14, 2007
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    Arrow Bridge,NY
    Spray foam .
     
  3. NNYorker

    NNYorker
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    Mar 18, 2008
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    Loc:
    Upstate N.Y.--45 min. to the Canadian border, eh!
    I've got a 30 x 48 pole barn-- concrete floor, metal siding and roof-- 30LB felt paper was placed under the roof panels for just your reason. Barn is not heated. Recently came upon free Polyiso insulation used under EDPM roofs--has a paper face on both sides. I will use this on both sidewalls and roof because the price is right(Free). If you know any local roofers ask their opinion--maybe you can strike a deal on discounted leftover supplies as I did.
     
  4. PaulRicklefs

    PaulRicklefs
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    Sep 24, 2008
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    La Ronge, SK Canada
    Once you insulate above the ceiling it should stop your condensation problem. Think of condensation on a beer bottle. Once the beer bottle isn't cold anymore, no more condensation. Same with ceiling. Insulate it from above with r-50 (at least r35) and you shall have no more rain forest.
     
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