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    Air Barriers for Masonry Walls

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    This paper discusses prevention of interstitial condensation in masonry walls due to infiltration of warm moist air into air-conditioned buildings in summer and exfiltration of warm moist air in winter. The following aspects of the problem are discussed: air pressure differentials due to wind, stack effect, and mechanical ventilation; air leakage, modes, and test methods; climate effects; air barriers, insulation materials, and their placement in cavity walls, veneer walls, and single wythe walls; methods for sealing cracks and joints; and building code requirements. Thirty-one references are cited.


    adhesive, air barrier, air leakage, air pressure, building code, cavity wall, climate, condensation, crack, exfiltration, infiltration, insulation, joint, masonry, mold, moisture, screw anchor, sealant, sealing tape, single wythe wall, stack effect, testing, vapor retarder, veneer wall

    Author Information:

    Grimm, CT
    Consulting Architectural Engineer, Austin, TX

    Committee/Subcommittee: C15.05

    DOI: 10.1520/STP11045S