Uploaded December 2025 | Updated September 2026, 2 hours ago

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Air tightness is critical for a building's long-term durability and occupant health, primarily to control moisture and prevent issues like mold and rot that can result from air leakage condensation. This is especially important in modern, insulated buildings where reduced heat flow and colder cavity spaces increase the risk of condensation when warm, moisture-laden interior air finds a cold surface. The role of a continuous air barrier is to prevent uncontrolled air exfiltration or infiltration, ensuring a highly predictable and durable building enclosure and good indoor air quality.

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