Attic Insulation Paper Side Up

If you put it on the right side where the humidity is it s not much of a vapor retarder.

Attic insulation paper side up.

Keep the batting insulation s paper facing pointed up toward the living space above. Add weatherstripping around the perimeter and a sweep to the door of a walk up attic. Regardless of whether fiberglass insulation is installed in a wall attic or crawlspace. Always have the paper toward the living area which in the case of an unfinished attic insulating attic floor would be paper face down.

Pull down stair or ladder. The moisture will get the insulation wet and reduce its effectiveness. Kraft paper and its underlying asphalt adhesive are flammable and should always be covered with drywall or other fire resistant material. The vapor barrier is flammable and according to the manufacturer s label on the insulation the vapor barrier should be installed against the floor.

The warmer air on one outer side of the wall causes water to build up along the colder inner side. The wetter it gets the better it dries. The paper facing on insulation has an asphalt layer which acts as a vapor barrier. Attic hatch or door.

And when you re retrofitting insulation in the floor of a crawlspace fig. Fiberglass batts insulation is installed in the crawl space with the paper facing exposed. Facing is a thin layer of paper or plastic attached to one side of batting insulation which is sold in a roll. Affix rigid foam insulation to the attic side of the hatch or door.

The upshot here is that if you put the kraft paper on the wrong side and it gets wet it won t trap moisture. D installing the kraft faced insulation paper side up provides an adequate vapor retarder. That s because the paper contains a layer of asphalt adhesive which prevents water vapor from passing through it. It can also cause mold rot and other problems in the wall.

You only want one vapor barrier in your attic and it should be as close to the ceiling as possible to prevent warm moist air from coming up from the heated house and condensing when it hits the cold air in the attic. Make sure the first layer you put down on the floor of the. Use a zippered insulated tent to keep the enclosure draft free attic tent at 7 attic cover insulator 120. The paper facing should always face toward the inside of the home.

Also on the graph is the permeance of polyethylene. The right barrier will block the moisture from reaching the insulation.