in roofs and walls can be detected with a sensitive infrared camera, under the
right conditions. Infrared roof inspections are performed most effectively after
sunset, when the roof gives off its heat energy accumulated during the day. The
heat capacity of moisture soaked roof insulation is greater than that of dry
insulation. As a result, the moisture soaked roof areas appear quite clearly
when performing an infrared scan.
Similarly, it is
possible to detect moisture located behind interior walls with an infrared
camera, under the right conditions. The temperature difference created by the
presence of moisture on the inside surface of a wall will appear differently
than the surrounding area.
inspection is a fast, non-invasive method to discover moisture intrusion within
the building envelope. Infrared inspection does not directly detect the presence
of mold, rather it may be used to find moisture where mold may develop. The
limitations to obtaining accurate infrared images pertain to the ability of the
surface being scanned to emit heat energy. Gypsum (dry wall) in interior walls
emits quite well, whereas highly reflective surfaces do not. Since the
temperature difference between the wet and the dry wall are very slight, a
sensitive infrared camera must be used.
Infrared Solutions Inc. created the IR-InSight¢ç and FlexCam¢ç S portable infrared imagers specifically for this application. At the heart of the IR-InSight and FlexCam S is an extremely sensitive microbolometer thermal sensor that can distinguish between temperate differences of less than 1/20 degree F.
Further information regarding mold may be found on the following sites: