What are air barrier components characterized as?

Air barrier components are characterized as pre-manufactured elements like windows and mechanical, electrical, and plumbing (MEP) items. This is because air barriers play a crucial role in managing the movement of air through the building envelope and ensuring energy efficiency. Components such as windows and MEP systems must be designed and installed to maintain the integrity of the air barrier, preventing air leakage and enabling overall building performance.

In the context of building construction, air barrier components include materials that are specifically designed to resist the passage of air, such as pre-manufactured skylights or ventilation systems, which are integrated into the structure. This integration helps ensure that the building envelope remains continuous and effective in controlling the air flow.

While flexible membranes used in roofing and accessories that support air barriers play important roles in the overall structural performance, they do not specifically highlight the pre-manufactured nature of certain air barrier components that are critical in maintaining air tightness. Likewise, framing insulation types aren't primarily considered components of the air barrier system, even though they can contribute to the overall thermal performance of a building.