CLT Panels Rarely Remain AirtightPressure differences cause air movement across the building enclosure. Movement is caused by a pressure differential between the inner and outer enclosure surfaces, typically attributed to a combination of wind, the stack effect, and mechanical ventilation systems.
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Air Barrier Must be ContinuousA continuous air barrier is a requirement of both the 2018 IECC1 and the National Building Code of Canada to control air flow across the enclosure. Limiting the air flow across the CLT enclosure, both inward and outward, has significant performance benefits such as:
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DurabilityAn air barrier must be durable to avoid damage that could affect its intended performance during construction and throughout its service life. |
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System of Materials is RequiredThe air barrier is not a single component or material but rather requires a system of materials, components, and assemblies that provide continuous air control throughout the building enclosure. |
CLT: Managing Air and Heat
