Thermal Moisture Survey
An inspection technique using infrared (thermal) cameras to detect temperature differences in building surfaces that indicate hidden moisture, insulation gaps, air leaks, or structural anomalies invisible to the naked eye.
What Is a Thermal Moisture Survey
A thermal moisture survey uses infrared camera technology to detect temperature variations on building surfaces that indicate hidden moisture, allowing restoration technicians to map the full extent of water intrusion without cutting into walls, ceilings, or floors. Wet materials conduct and retain heat differently than dry materials, creating temperature differentials that are invisible to the eye but clearly visible on an infrared image. The survey provides a non-destructive method to identify moisture behind finished surfaces.
How Thermal Imaging Detects Moisture
When building materials absorb water, the evaporative cooling effect makes the wet surface cooler than the surrounding dry material. An infrared camera detects this temperature difference and displays it as a color gradient on the thermal image. The technician scans walls, ceilings, and floors, looking for cooler zones that indicate moisture. The thermal image is then confirmed with a moisture meter to verify that the temperature anomaly is caused by moisture rather than other factors like air leaks or insulation gaps.
Thermal Surveys in Insurance Documentation
Thermal images provide powerful documentation for insurance claims because they show the extent of hidden moisture that would otherwise require destructive testing to prove. Include thermal images in the claim documentation alongside standard photographs and moisture meter readings. The images should be annotated with location references and moisture meter confirmation readings. This documentation supports the scope of drying equipment deployed, the area of affected materials, and the extent of demolition needed to access wet substrates.
Frequently asked questions
Wet building materials retain heat differently than dry materials. An infrared camera detects these temperature differences on surfaces like walls, ceilings, and floors, displaying them as color variations on a thermal image. Cooler areas on an otherwise warm surface typically indicate moisture presence. The survey identifies the moisture boundaries without destructive testing.
While not required by all carriers, thermal moisture surveys provide compelling documentation that supports the scope of water damage beyond what is visible. IICRC S500 standards recommend thermal imaging as part of the inspection process. The survey results help justify the drying equipment count and placement by documenting the full extent of moisture intrusion.
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