Moisture Barrier Inside Walls

Moisture vapor barrier primer finish interior latex is a coating designed to reduce the loss of moisture through walls and ceilings.

Moisture barrier inside walls.

Of rigid moisture proof insulation. Finished basements often receive a vapor barrier layer between the concrete and the floor treatment to prevent damage from heavy rains or other moisture seepage. Cover exposed foundation walls with 1 1 2 in. 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.

Vapor barriers are applied to the interior walls in climates which are predominantly cold while they are best applied to exterior wells in predominantly hot climates. 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. It combines a primer and finish in a single fast drying coat and is specially formulated for manufactured housing facilities. Therefore this wall assembly has all of the thermal insulation installed to the interior of the vapor barrier.

In any case the vapor barrier must point to the warm side. Vapor barriers are sheets of plastic or other material placed on one side of insulation sheets. A smart vapor retarder is a good solution. Vapor barriers go on the warm side of the wall generally between the framing and the interior sheathing or wall finish and should have a permeability rating of 0 25 or less.

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. Additionally consider installing vapor barriers should you be building new or willing to weather renovation. Without a vapor barrier in place condensation inside the walls could ruin the insulation and promote the growth of harmful mold and bacteria. We used thermax brand available through lumberyards of polyethylene vapor barrier because it doesn t require an additional fire barrier.

This material adapts to let moisture out of the wall whether the humidity levels are higher on the outside of the wall winter or the inside summer. A smart vapor retarder is a vapor retarder material with the unique ability to react to changes in relative humidity by altering its physical structure. Of particular concern is the fact that the thermal insulation is air permeable except where spray foam is used. The goal of vapor barrier strategies is to prevent moisture from collecting and corrupting building materials.

The vapor barrier in this assembly is the precast concrete itself.