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-   -   Basement vapor barrier question (http://www.diychatroom.com/f15/basement-vapor-barrier-question-19836/)

rob7young 04-12-2008 09:05 PM

Basement vapor barrier question
 
I'm finishing a basement and have a question about the vapor barrier. The walls in this section are half foundation and half studs/siding with insulation and vapor barrier. I'm building a full wall in front of this. I saw in a previous post the need to remove the old vapor barrier to avoid trapping moisture between the old one and my new one. My question is since there's a gap between my top plate and the original top plate, do I need to do anything with my vapor barrier when i reach my top plate to seal back to the original top plate. My question is mainly about the wall that runs perpendicular to the joists, but there will be a similar question on the adjacent wall that runs parallel to them. I'm in Kansas if that matters from a climate perspective.

Chris Johnson 04-12-2008 10:30 PM

Insulation and vapour barrier need to run all the way into the joist cavity and touch the bottom of the subfloor to meet 'code'.

Gencon 04-13-2008 10:10 AM

Yup, and fill the space between the 2 stud walls with insulation. Rib batts apart and lay them in horizontally for the best coverage.


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