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 bathroom interior walls.
Run the height of the vapor barrier from the top all the way down into the shower pan make sure not cut too short before the water barrier.
Whether or not you need a vapor retarder hinges on three main factors your climate your home and the location of the wall you re insulating.
In areas with high humidity such as greenhouses rooms with spas or swimming pools and bathrooms vapor barriers are often recommended.
A vapor barrier reduces the movement of water vapor by diffusion.
The traditional approach to preventing water vapor from penetrating walls in homes is a 6 mil polyethylene vapour barrier or vapor barrier for our southern neighbours.
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.
Use a minimal amount of staples to secure the vapor barrier to the walls studs.
Most authorities recommend vapor barriers in certain situations.
Avoid adding interior vapor barriers where the outer wall construction already includes a material with vapor barrier properties.
A vapor retarder is a material used to prevent water vapor from diffusing into the wall ceiling or floor during the cold winter.
After the insulation is in place you will want to add a vapor retarder sometimes called a vapor barrier if you need one.
This is an ideal building practice in the extreme northern communities of canada less so as you come further south.
Interior bathroom and kitchen walls for example are areas.
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.
A vapor barrier s job is to keep water vapor in humid air from diffusing through one side of a wall and finding a cool surface inside the wall.
There is no need to vapor barrier the non exterior walls.
Use appropriate tape to adhere two pieces of vapor barrier and edges to avoid moisture entry to the back walls.
Not every wall does.
Vapor retarders are there to slow the diffusion of moisture so the building inspector is off base argues senior editor martin holladay.