In wastewater infrastructure rehabilitation, improper installation will cause even the most advanced coating system to fail prematurely. Quality assurance and quality control form the foundation of long-term performance, yet crews often treat them as an afterthought. Industry experience shows that surface preparation and QA/QC account for roughly 90% of an installed coating system’s success — and 90% of failures when they are not done correctly.In municipal rehab projects, coating systems act as structural reinforcement corrosion barriers and, in high-infiltration areas, seals that keep groundwater out. To achieve that performance, utilities and contractors need a clear QA/QC road map that covers preparation,
