Where can air barrier requirements typically be found within building codes?

Air barrier requirements are crucial for ensuring the energy efficiency and effectiveness of a building's envelope. These requirements are typically embedded within key codes and standards such as the International Building Code (IBC), International Energy Conservation Code (IECC), International Residential Code (IRC), and applicable ASHRAE standards.

These codes and standards provide specific criteria and guidelines on the performance and installation of air barriers, reflecting standardized practices that are recognized and followed at state and local levels. They are formulated to enhance building performance, improve energy conservation, and maintain indoor air quality.

Finding such requirements within these nationally recognized codes ensures consistency and uniformity in building practices across different regions and jurisdictions, rather than relying solely on local regulations or federal guidelines, which may not specifically address the nuances of air barrier systems. Therefore, option B is well-supported by the structure of the building code framework utilized across most construction projects.