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EERE » BTO » Building America » Solution Center Home » Image Gallery » Wrong - Do not install a Class I vapor retarder over vapor-permeable insulation on the interior of a foundation wall because the vapor retarder can trap moisture in the wall, which can lead to mold.

Wrong - Do not install a Class I vapor retarder over vapor-permeable insulation on the interior of a foundation wall because the vapor retarder can trap moisture in the wall, which can lead to mold.

Wrong - Do not install a Class I vapor retarder over vapor-permeable insulation on the interior of a foundation wall because the vapor retarder can trap moisture in the wall, which can lead to mold.