Vapor Barrier For Bathroom Walls

A vapor or moisture barrier is a layer of protection that is designed to act as a waterproof shield helping to keep condensation away from wood insulation and other mold prone materials that are located behind the drywall.

Vapor barrier for bathroom walls.

Normally interior walls do not require a vapor barrier but there are some situations where it is highly recommended. If the tub shares this exterior wall i would put vapor barrier behind it if you can as the plastic tub surround will not give you a vapor barrier i don t think. There is no need to vapor barrier the non exterior walls. Vapor retarders are there to slow the diffusion of moisture so the building inspector is off base argues senior editor martin holladay.

The inner surface in colder climates and the outer surface in hot humid climates. The vapor barrier should be on the inside between the insulation and drywall. It s usually a thin layer of plastic that sits between the drywall and the studs. Interior bathroom and kitchen walls for example are areas where there is.