CAN ULC-S741-2008 (R2016) PDF Download

CAN ULC-S741-2008 (R2016) is a standard that establishes the minimum requirements for air barrier materials used in building applications. Its purpose is to restrict airflow through insulations and assemblies, ensuring the integrity of the building envelope.

The standard covers various types of air barrier materials, including membranes, sprayed and/or foamed plastics, and panels. It outlines testing and reporting requirements for air permeance, as well as water vapor transmission and permeability for materials that may not be tested for this characteristic in other standards.

Additionally, the standard provides detailed requirements for the air leakage characteristics of air barrier materials before and after conditioning, along with the conditioning methods used.