Seeing Red!
There are a number of tools available to help evaluate and correct building problems, particularly those related to moisture intrusion. Infrared scans are frequently used for checking roofs and exterior building walls This same technology is used to check for hot and cold spots in walls, electrical equipment, etc.
A side use of infrared cameras has been to survey interior finished surfaces for possible “hidden” water intrusion. Sometimes, these cameras can detect moisture in ceilings or walls even before there are visible signs of moisture or drywall damage on inside surfaces.