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Thread: new drywall

  1. #1
    Join Date
    Oct 2008
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    2

    Default new drywall

    after old walls are torn out i have seen people use plastic over walls before drywall is put up as a moisture barrier is it wise to do that?

  2. #2
    Join Date
    Dec 2007
    Location
    MN
    Posts
    455

    Default Re: new drywall

    Quote Originally Posted by zzmredzz View Post
    after old walls are torn out i have seen people use plastic over walls before drywall is put up as a moisture barrier is it wise to do that?
    Sounds like you are asking about "vapor barrier" pretty much as jkirk is describing.

    If you want use the "search" function here on the forum and you'll find tons of stuff about vapor barriers.

  3. #3
    Join Date
    Oct 2008
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    2

    Default Re: new drywall

    Thank you for the info. ^_^

  4. #4
    Join Date
    Jun 2007
    Location
    Coventry, RI
    Posts
    340

    Default Re: new drywall

    This would be the case in northern climates where you heat the interior of the house for late fall-early spring. If you are in a climate where you use AC for a large portion of the year you would want your vapor barrier on the outside of the exterior walls and not on the inside. This would keep the warm moist air from the outside from getting into the wall cavity on hot humid days. Basically you want to install the vapor barrier on the warm side of the wall whether it be on the inside for a home that is heated often or on the outside of a home that is cooled often.

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