Rockwool Vapor Barrier Attic

The best air barrier material in this case would be 1 2 in.

Rockwool vapor barrier attic.

That s a significant difference especially if you re insulating an entire house or large addition. Rockwool insulation is moisture resistant yet vapor permeable. Rock wool insulation for the same wall cost about 1 06 per square foot. A natural inert plaster stucco on that.

Any water that contacts the outer surface will drain and not be absorbed into the body of the insulation. I design my envelop with two materials that mate well mw and 100 wood period. 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. In the event the insulation becomes damp or wet the insulation when thoroughly dried will maintain the original performance characteristics.

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. If it becomes damp or wet the insulation when dried out will maintain the original performance characteristics. For more information on the need for air barriers behind metal fireplaces visit this useful web page from the u s. Despite the fact these two barrier systems are neither the same nor interchangeable there is sometimes confusion in the industry as a single material is often used for both functions.

Furthermore stone wool insulation does t wick water. Interior moisture that cannot be eliminated must be controlled by employing an effective air barrier and vapor retarder barrier. Drywall with taped seams.