Occupancy begins, then water stains appear beneath completed work.
Use the site evidence to agree a project-specific method with the responsible engineer, concrete producer, manufacturer or specialist applicator.
Occupancy begins, then water stains appear beneath completed work.
Review as-built photos, hold-point records, test reports and plumbing routes; isolate zones.
Unverified penetrations, later damage or service leaks can be hidden by finishes.
Use staged diagnostic tests, repair the confirmed path and restore protection and finishes.
Create accessible inspection openings only under a safe, agreed method; document each finding.
Retest the isolated zone and monitor after representative use and rain.
Do not demolish a broad area based only on the location of the interior stain.
References inform the topic; they do not endorse a specific product for this project.