Installing A Vapor Barrier In The Attic

Vapor barriers also come in rolls.

Installing a vapor barrier in the attic.

Staple it into place. Installing vapor barrier and insulation when we have the correct fitting for your vapor barrier we will then install it along with insulation that helps lower your cooling and heating costs. How to install kraft faced insulation. Attic insulation should always be installed with the paper backing facing toward the living space the ceiling in this case.

The insulation fiberglass or cellulose is then placed on top of the drywall with no vapor barrier above or below. This acts as a barrier to keep heated moist air from rising up into the attic during cold weather. In many of those cases vapor barrier paint woks better than installing sheeting. Always follow the insulation manufacturer s specific installation instructions and be sure to adhere to local building code requirements.

You can forego the plastic and use a vapor retarder kraft faced insulation or latex ceiling paint in all other climates except hot humid or hot dry climates. If you don t like using staples then secure the barrier with duct tape. Some regions don t require a vapor barrier. As you work sweep your hand across the surface to push out air and keep the barrier flat.

Start from one corner and staple the barrier in place. Codes in some areas may require you to staple the insulation flanges on the front exposed side of the framing to create a continuous vapor barrier. Vapor barriers are especially relevant for loose insulation and blanket styles that do not have a barrier incorporated. Gradually roll the barrier out and use your chosen method to secure it at regular intervals.

Adding a second vapor barrier could cause condensation to become trapped in the insulation between the two vapor barriers. The best approach for a vented attic in a cold climate is installing a layer of drywall with a good coat of latex paint the paint creates a semi permeable vapor barrier. The application can vary so read all instructions on your specific brand of paint. Instead of pulling away the insulation sheets to slip in the barriers apply at least one thick coat maybe two to the insulation.

In existing spaces oil based paints or vapor barrier latex paints offer an effective moisture barrier. 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. The inner surface in colder climates and the outer surface in hot humid climates. Vapor barriers are usually best installed on the side of the wall that experiences the hotter temperature and moister conditions.

Taking care of your house starts from the ground up.