Do i have to use a breathable Damp Proof Membrane on timber?

Discussion in 'Building' started by dunny1234, 15 Sep 2011.

  1. dunny1234

    dunny1234

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    I'm currently building a toilet/shower timber framed building on my campsite. I'm building the timber frame panels in a barn, so i've done the 4"x2" studs, roof and sole plates, 9mm OSB sheathing, and now i need to attach a DPM.

    Does it need to be breathable? Obvoiusly, normal DPM is far cheaper than breathable DPM

    Thanks in advance!
     
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  3. geraint

    geraint

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    there is no such thing as a breatherable damp course
     
  4. noseall

    noseall

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    You would be crazy not to surely?
     
  5. ^woody^

    ^woody^

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    If you can prove that the frame wont get any excess moisture so wont need to let it escape, then you wont need a breathable membrane

    It's only £40 a roll, just put the pitch prices up next summer to get the money back
     
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  7. freddiemercurystwin

    freddiemercurystwin

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    Aye especially if you expect the OSB shoite to survive.
     
  8. geraint

    geraint

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    Surely.. If the damp was breath able then it is not a dpm...

    more joe boys on here......
     
  9. noseall

    noseall

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    Modern sheathing and sarking membranes are designed to let vapour out but not let water in.

    So we builders are told.
     
  10. dunny1234

    dunny1234

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    Breathable it is! Your faithfully tight arXe
     
  11. DIYnot Local

    DIYnot Local

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