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zzmredzz
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?

bsum1
Re: new drywall
zzmredzz wrote:

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.

zzmredzz
Re: new drywall

Thank you for the info. ^_^

sabo4545
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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