Rockwool Vapor Barrier Attic

That s a significant difference especially if you re insulating an entire house or large addition.

Rockwool vapor barrier attic.

Rockwool stone wool insulation does not wick water which means that any bulk water that contacts the outer surface will drain and not be absorbed into the body of the insulation. Furthermore stone wool insulation does t wick water. If it becomes damp or wet the insulation when dried out will maintain the original performance characteristics. While there is no need for a vapor barrier you certainly need an air barrier in this location.

Rockwool insulation is moisture resistant yet vapor permeable. Interior moisture that cannot be eliminated must be controlled by employing an effective air barrier and vapor retarder barrier. Rock wool insulation for the same wall cost about 1 06 per square foot. Any water that contacts the outer surface will drain and not be absorbed into the body of the insulation.

Rockwool insulation is moisture resistant yet vapor permeable. I design my envelop with two materials that mate well mw and 100 wood period. Drywall with taped seams. I d personally seal the attic and not use any petro based papers or non inert vapor retarders barrier materials or house wraps like most foams wraps that don t work since they lack cfm or high perm nor are chemically stable.

For more information on the need for air barriers behind metal fireplaces visit this useful web page from the u s. In the event the insulation becomes damp or wet the insulation when thoroughly dried will maintain the original performance characteristics. The best air barrier material in this case would be 1 2 in.