Yet another example of the power of infrared when properly used as part of a home inspection.
I was able to detect this shower leak in the closet behind the shower. The shower had been running for about 15 minutes when the first IR picture was taken. The warmer signature at the baseboard was the crucial indicator. Moisture was confirmed with a moisture meter as shown. The second and third IR pictures show the thermal signature that is created as the moisture cools and begins evaporating and seeping into the pad.
March has been a big shower leak month so far. That makes 5 in two weeks.