Which of the following can locate moisture leaks behind walls?

• A. Infrared camera
• B. Moisture meter
• C. Both infrared camera and moisture meter
• D. Acoustic listening device

Answer: (C)

Detecting moisture behind walls relies on tools that reveal moisture presence and verify it. An infrared camera shows temperature patterns on surfaces; damp areas often run cooler or display distinctive thermal anomalies, helping you spot spots behind the wall without disassembling. A moisture meter then measures the actual moisture content in the wall materials at those spots, confirming moisture and guiding remediation. An acoustic listening device can hear sounds from hidden plumbing leaks, but it doesn’t measure moisture levels in the wall itself and may miss damp areas without audible flow. So using the infrared camera to screen and the moisture meter to confirm and quantify moisture behind walls is the most effective approach.