Exterior Wall Vapor Barrier Installation

In any case the vapor barrier must point to the warm side.

Exterior wall vapor barrier installation.

Vapor barriers are sheets of plastic or other material placed on one side of insulation sheets. That way you can ensure your vapour barrier is installed properly on the exterior wall you can add insulation to the interior wall for better r value and you will have a cable chase between the two walls if needed for future reference. 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. Very hot and humid climates may benefit from an exterior vapor barrier that keeps outside humidity from penetrating into walls.

How did this project turn out. When a vapor barrier is on the side of a wall where the dry air is i e outside in winter or inside in summer moisture problems can occur. I would build the additional 2x4 wall in front of your exterior wall if you have the room. Using other kinds of tape will compromise the waterproof seal and render the barrier useless.

If you have access it should be cheap. There is no need to vapor barrier the non exterior walls. This barrier is meant to keep moisture from getting to the insulation in the walls and ceilings and it is required by building codes when insulating most houses. 1404 2 1 where cement plaster stucco is to be applied to.

To be extra certain use a caulk gun to place caulk material around the tape to double seal the barrier. The standard installation of a plastic vapor barrier is between the studs and the drywall but there are some exceptions to this. In exterior walls that are below grade like basement walls. The vapor barrier should be on the inside between the insulation and drywall.

Accordance with the manufacturer s installation instructions. The exterior face of the wall or floor cavity should remain permeable in order to allow dissipation of any moisture that does enter the wall cavity. Finish the wall within a month of installing the barrier to prevent damage to the surface and protect the vapor barrier. 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.