Any object that has a temperature above absolute zero radiates energy in the form of heat.  Infrared thermal imaging is accomplished with use of a thermal imaging camera that can detect subtle differences in surface temperature, this practice is called Thermography.  The person that uses this technology is called a Thermographer.  The ability to view and interpret small changes in surface temperature of various materials provides an inspector a unique insight.  This inspection process is efficiently fast and a non-destructive method of detection. FLIR infrared thermal camera system provides real-time thermal imaging to help in detection of electrical problems, overheating, air loss, air migration, roof leaks, retained moisture and areas of missing insulation. This technology provides the modern inspector with a 6 sense to observe otherwise undetectable conditions.

— Please review normal view / thermal view photos below for example that reveal conditions otherwise undetectable —