What is the expected outcome if the installation substrate is not clean?

If the installation substrate is not clean, the expected outcome is poor performance of the air barrier. Clean substrates are crucial for ensuring that the adhesive materials properly bond to the surface. Contaminants such as dust, debris, grease, or moisture can interfere with adhesion, leading to gaps or weaknesses in the air barrier system. These gaps may allow air leakage, compromising the overall effectiveness of the air barrier, which is designed to prevent uncontrolled air movement within the building envelope. This not only affects energy efficiency but can also lead to issues such as moisture intrusion and mold growth, thereby affecting the health and safety of the building occupants. The relationship between substrate cleanliness and adhesive performance is fundamental in achieving a reliable air barrier system.