• Effectiveness: Ensures that the VI mitigation system adequately prevents the intrusion of contaminant vapors.
• Durability: Guarantees that installation can withstand the rigors of construction and will last the lifespan of the building
• Compliance: Helps comply withregulatory requirements, avoiding legal and financial repercussions

The effectiveness of these barriers heavily depends on factors such as chemical resistance, constructability, and rigorous Construction Quality Assurance or CQA processes. This guide delves into the essential role of CQA in contaminant vapor barrier installations, outlining the best practices, potential pitfalls, and solutions to achieve optimal outcomes in construction projects.