The Problem
A 12-storey office tower property manager had damp drywall on the 3rd floor. Two contractors had opened ceilings and found nothing. Tenants were complaining.
Detection Method
Evening thermal imaging scan identified a 2C differential in a fan-coil supply line above the ceiling — a pinhole leak saturating drywall over weeks.
Results
Repaired same week. No drywall removal beyond a small patch. All tenants unaffected. PM now schedules annual thermal scans for all common areas.