Installing Vapor Barrier In Attic

Not be trapped inside.

Installing vapor barrier in attic.

This acts as a barrier to keep heated moist air from rising up into the attic during cold weather. Never compress or fluff your insulation. If you are ready to clean up your crawl space and install a vapor barrier contact attic projects for a custom estimate or give us a call at 858 246 7421. To install an efficient vapor barrier you need the dimensions of the room.

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. How to install radiant barrier on attic rafters in 5 steps. Plastic vapor barriers should only be installed in vented attics in climates with more than 8 000 heating degree days. The vapor barrier might be tarpaper kraft paper attached to fiberglass batts or a plastic sheet.

In existing spaces oil based paints or vapor barrier latex paints offer an effective moisture barrier. Adding a second vapor barrier could cause condensation to become trapped in the insulation between the two vapor barriers. The insulation fiberglass or cellulose is then placed on top of the drywall with no vapor barrier above or below. The goal of adding a radiant barrier in your attic is to cover as much of the underside of the roof as possible.

Vapor barriers are usually best installed on the side of the wall that experiences the hotter temperature and moister conditions. Take the measurements with you when purchasing materials. 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. Vapor barriers in attics should only be installed on one side of the insulation.

The inner surface in colder climates and the outer surface in hot humid climates. 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. Contact us for a free estimate. You want to add the foil on all surfaces that make up the roof but you also need to keep vents open and clear of the foil.

If there does not appear to be a vapor barrier you might consider painting the interior ceilings with vapor barrier paint. Do not overlook attic access door. Fill out the form below to hear from one of our vapor barrier specialists. Some regions don t require a vapor barrier.

Measure the entire area and write down the results.