The U.S. Department Of Energy now recommends that a Thermographic Scan be done before purchasing a house, even on New Homes.
Infrared Thermal Imaging can detect many issues not seen in a tradition visual inspection:
Faulty wiring, breakers and fuses
Hidden moisture intrusion
The moisture sources of mold
Pipe and duct work leaks
Roof and ceiling leaks
Moisture associated with termite nests
Rats, mice and other pests
The answer is only a very few do... So why don't all Home Inspectors use Infrared Imaging?
This technology is awfully expensive, some inspectors cannot or will not invest that much back into their business. Others believe that Infrared "sees too much" and that it is too far beyond the required standards and may increase their liability. I believe differently. I believe my clients deserve the absolute best inspection possible and that includes Infrared Thermal Imaging. The use of thermal imaging in Home Inspections here is relatively new but with proper education on my part clients understand what the technology is capable of and what it is not. They benefit from the thorough inspection and I sleep better at night knowing I have provided the best possible inspection for my clients.
If you want to look it up (google it)
I use a Fluke TIR-32 Building Diagnostics Thermal Imaging Camera