What action should an inspector take if a substrate is found to be non-compliant?

The appropriate action for an inspector when encountering a non-compliant substrate is to report it to the contractor. This action ensures that any issues are formally communicated, allowing the contractor to address the deficiency appropriately. Reporting non-compliance is essential as it activates necessary remediation steps and maintains the integrity of the work and safety standards. It encourages accountability and helps ensure compliance with relevant codes and specifications.

While suggesting corrective measures or documenting the issue may seem useful, reporting directly to the contractor opens a line of communication that is crucial for rectifying problems promptly. Ignoring the issue is not an option, as it can lead to further complications down the line, compromising safety and quality standards.