What best describes an 'air barrier assembly'?

An 'air barrier assembly' is best described as a complete system of materials, connectors, and design strategies. This definition emphasizes that an air barrier is not just a single component but rather an integrated system that includes various layers and materials specifically intended to control air movement in and out of a building. This assembly works collectively to reduce air leakage, contributing to the overall energy efficiency and indoor air quality of the building.

This comprehensive approach is critical in modern construction, as building envelopes must be designed with both functionality and efficiency in mind, incorporating materials like membranes, framing connectors, and other components to ensure a continuous barrier against air movement. By understanding the air barrier assembly as a holistic system, practitioners can better address potential vulnerabilities in a building's envelope and apply effective air barrier strategies in their designs.