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DCEnglish
Vapor Barrier in Bathroom on interior walls?

I am in the process of adding a new bathroom in my basement.
One wall is against the foundation (separated by a 2x4 wall)
The other three are interior walls which are shared by a finished
unheated basement(heated only by the boiler room).

I was wondering if the insulation I am installing in the three interior walls should have a vapor barrier and if so would a Kraft faced insulation be the one to use - facing toward the bathroom???

Also the ceiling is already insulated with the Kraft paper facing up towards the next floor - the heated living area. Is this okay or should I remove the paper VB on this insulation and face it toward the bathhroom????
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Debra
Re: Vapor Barrier in Bathroom on interior walls?

It seems to me that the vapor barrier should be between the room and all the interior space. I don't know about Kraft faced insulation though.

I'm voting for a vapor barrier on both sides of the ceiling, just incase there are leaks upstairs and to prevent moist air from infiltrating from below.

What ever you do VENT THAT BATHROOM TO THE OUTSIDE. To get the moisture out of there.

DCEnglish
Re: Vapor Barrier in Bathroom on interior walls?

Thank you for your input!!!:)

DCEnglish
Re: Vapor Barrier in Bathroom on interior walls?

Oh and I am installing a vent with a 140 cfm rating so it should pull most of the moisture out of there anyway....

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