Which assembly requirement is specified in air barrier codes?

The requirement for assemblies to meet specific air leakage rates is a critical aspect of air barrier codes. This requirement ensures that buildings maintain energy efficiency and indoor air quality by preventing unwanted air flow through the building envelope. Air leakage can lead to increased energy consumption for heating and cooling, contributing to higher operational costs and diminished comfort levels for occupants. By adhering to established air leakage rate standards, builders and designers can effectively control air movement, minimize energy loss, and ensure that the structures perform as intended in terms of moisture management and thermal control.

The focus on measurable air leakage rates aligns with broader building performance goals and sustainability efforts. Compliance with these rates is often verified through field testing, which is essential for confirming that the air barrier system has been installed correctly and functions as designed under real-world conditions.