Vapor barrier in bathroom remodel
I am in the middle of a bathroom remodel. My house was built in the late 60s and is located in climate zone 6 (Quebec). My question is about the damaged kraft paper that is supposed to act as a vapor barrier. From what I can see the wall assembly is (from the interior):
- Kraft paper
- Furring strips
- Some cardboard fiber and studs
- Probably batts insulation (I can't see behind the cardboard)
- Tar paper and exterior sheeting (brick)
Some of the drywall had little mold spots and the kraft paper is black near the furring strips (see attached pictures). Is this mold?
The kraft paper is not sealed with tape and has perforations from the nails used to hang drywall. I have read this GBA post http://www.greenbuildingadvisor.com/blogs/dept/musings/do-i-need-vapor-r...
which makes me think that I do not need a vapor barrier at all.
If this is true will the drywall make a sufficient air barrier or should I replace the kraft paper with some other type of material?
Otherwise, I could replace the kraft paper it with foil faced kraft paper (which I aready have) but then it would be in directy contact with the drywall unless I remore the furring strips before applying the the vapor barrier which I think is the way it is done by builders nowadays since it does leave the air gap required by the reflective barrier.
Would it be OK to install foil faced kraft paper on the furring strips to act as an air and vapor barrier?
Posted Sep 1, 2014 1:56 PM ET
Edited Sep 1, 2014 1:56 PM ET
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