Thermal Imaging and Home Inspections

One of the tools I bring along to home inspections is a thermal imaging camera.  A thermal imaging camera detects infrared energy (heat) on a surface and converts it into a visual image.  The visual image shows variations in surface temperature by translating the infrared energy into various colors depending on the temperature it detects.  While it looks like it provides X-ray vision, the scan does not penetrate the surface – only the temperature on the surface is detected.
 
The photos can be useful in a variety of applications:
 
Confirm the presence (or absence) of heat:  The camera can confirm air flow at registers, radiators warming and the operation of radiant floor heat.

radiant floor heat

confirmation of air flow at register

radiator

​Identifying insulation issues:  Gaps and deficiencies in the insulation become apparent.

gaps in attic insulation

cold air infiltration at uninsulated box sills

​Investigating potential moisture stains:  Scanning a stain on a ceiling can tell you if there is moisture in the area and needs further investigation for an active leak.  The results can be weather dependent though.  If there has been no rain or melting snow recently, the camera will not detect the presence of moisture.

moisture on ceiling verified with thermal imaging camera and moisture meter

These are just a few examples of where thermal imaging can be useful during an inspection.  And when used with other tools such as a moisture meter, it can identify issues that need to be investigated further.