Attic Insulation Installation Vapor Barrier

The paper facing contains a layer of impermeable asphalt that prevents water vapor from passing through it.

Attic insulation installation vapor barrier. Not every wall does. Some debate still occurs over how necessary vapor barriers are but a consensus is growing closer. Whether using loose fill or batts put the vapor barrier closest to the warm side of your installation where hot moist air would get in facing the house s interior in cold climates beneath floor insulation and the attic s interior in hot climates on top of floor insulation. In any case the vapor barrier must point to the warm side.

When adding additional insulation to an attic that is already insulated never use insulation with a vapor barrier. The insulation fiberglass or cellulose is then placed on top of the drywall with no vapor barrier above or below. If you do there is a chance that moisture that has slipped by the first vapor barrier will become trapped by the second vapor barrier decreasing the value of your insulation. With our vapor barrier installation services there will be no issue of the crawl space of your home becoming a residence for pests bats and rodents.

In circumstances where conditions inside a home or office are much different than outdoor conditions water. Most authorities now agree that vapor barriers are important under certain conditions but not necessarily as a whole house solution for every home. Resolution of the vapor barrier debate. 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.

Do not add a vapor barrier on top of the insulation in your attic since the paper facing on the existing insulation is the vapor barrier. 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. Vapor barriers are sheets of plastic or other material placed on one side of insulation sheets.