Is it okay to have air pockets between drywall and vapor barrier?

reno_queen

I had to cut out a thin slab of drywall about 7 feet long and 1 foot high at the base of a wall. To patch it I cut some thin pieces of wood to screw the new pieces of drywall into. However these pieces of wood create an air pocket between the drywall and vapor barrier and I’m wondering if the Vapor barrier should be directly against the drywall or if it’s okay to patch the wall in this manner. I live in a colder climate, there is insulation...

Originally asked by JayFou on Stack Exchange (diy) (CC BY-SA 4.0).

uphilltech

Great question — answering as the UphillTech team:

The vapor barrier keeps the warm moisture laden air from hitting cold surfaces and condensing. The warm moist air is inside your house. The dew point occurs somewhere within your wall cavity. Having wood behind the drywall before the vapor barrier is fine.

Full answer by Fresh Codemonger: https://diy.stackexchange.com/a/330616 (CC BY-SA 4.0).

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