Installing Vapour Barrier In Attic

Vapor barriers are usually best installed on the side of the wall that experiences the hotter temperature and moister conditions.

Installing vapour barrier in attic.

Never compress or fluff your insulation. You will see on which side is the vapor barrier. Gradually roll the barrier out and use your chosen method to secure it at regular intervals. Vapor barriers in attics should only be installed on one side of the insulation.

Not be trapped inside. The inner surface in colder climates and the outer surface in hot humid climates. Since some leakage of moisture into the insulation in inevitable murphy s law you want it to be able to freely escape from the insulation into the attic. Most of the blanket insulation types have vapor barriers incorporated and can be very effective if installed properly.

As you work sweep your hand across the surface to push out air and keep the barrier flat. Staple it into place. Attic insulation should always be installed with the paper backing facing toward the living space the ceiling in this case. If you are reluctant to use staples secure the barrier with duct tape instead.

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. To assure proper protection of the vapor barrier you will need to cover the entire area of the attic. The insulation fiberglass or cellulose is then placed on top of the drywall with no vapor barrier above or below.