Recently I read a yellow page ad stating that there Thermal infrared is a mold detector! 
As a trained and certified Building science Thermogapher with FLIR i realized that the ad was misleading. Thermal Infrared is designed to detect temperature differential whether it is hot or cold. For example, when a water leak or flood occurs this can create a potential for mold fungi to grow. depending on the extent of the leak, how long the the water has been leaking such as over a 48 hour period and the temperature for mold to grow. The best environment for microbial growth is between 68 degrees to 86 degrees farenheit is the best environment. Yes thermal infrared will help to identify a leak or continous water intrusion, but it will not detect mold. Water and moisture is the by product to feed mold depending on the food source such as dry wall, ceiling tiles, carpet, etc. Thermal Infrared is a great tool to utilize heat loss for energy savings, roof leaks, missing insulation in walls or ceilings,radiant floor heating,  moisture, flooding, and more. 

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