Putting Up A Moisture Barrier Roof

Consult building inspection offices for local recommendations.

Putting up a moisture barrier roof.

Sloping the soil away from your home at about 1 2 in. Overlap any seams and tape them. And bring the plastic about 6 in. Your first job after the studs are in place is to fill those walls with insulation.

Not every wall does. That reduction of air and moisture infiltration can then help improve roof longevity. If you are not sure if you need insulation in your walls follow along with this flow chart. In very cold climates the use of polyethylene plastic vapor barriers between insulation and interior wallboard may be beneficial provided all air gaps into any wall and ceiling cavities are also blocked.

Up the wall and fasten it there. Cover the dirt crawlspace with a plastic moisture polyethylene vapor barrier. Make sure to adequately ventilate the attic area above the insulation. A roof design that includes an adhered roof membrane with multiple layers of insulation with board joints offset and staggered over a vapor retarder air barrier helps lower the risk that air and the moisture it carries will infiltrate the roof system.