SYMPOSIA PAPER Published: 01 January 2002

Air Barriers for Masonry Walls


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.

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Grimm, CT
, Austin, TX
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Developed by Committee: C15
Pages: 241–258
DOI: 10.1520/STP11045S
ISBN-EB: 978-0-8031-5470-4
ISBN-13: 978-0-8031-3450-8