Installing Vapour Barrier In Attic

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. Adding a second vapor barrier could cause condensation to become trapped in the insulation between the two vapor barriers. Vapor barriers are usually best installed on the side of the wall that experiences the hotter temperature and moister conditions.

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Never compress or fluff your insulation.

Installing vapour barrier in attic.

This acts as a barrier to keep heated moist air from rising up into the attic during cold weather. If you are reluctant to use staples secure the barrier with duct tape instead. This means also the access hatch. To assure proper protection of the vapor barrier you will need to cover the entire area of the attic.

The inner surface in colder climates and the outer surface in hot humid climates. Most of the blanket insulation types have vapor barriers incorporated and can be very effective if installed properly. Attic insulation should always be installed with the paper backing facing toward the living space the ceiling in this case. As you work sweep your hand across the surface to push out air and keep the barrier flat.

Gradually roll the barrier out and use your chosen method to secure it at regular intervals. Staple it into place. You will see on which side is the vapor barrier. Vapor barriers in attics should only be installed on one side of the insulation.

Not be trapped inside. 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 insulation fiberglass or cellulose is then placed on top of the drywall with no vapor barrier above or below.

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