Nobody schedules an inspection hoping for rain, but a wet day is actually one of the better days to have somebody look at a house. In some cases, an inspector using no special equipment will be able to catch large issues like water leaks from rain during an inspection. However, what can the inspector do if there is nothing visible? This is where thermal imaging saves the day. Thermal imaging can see new leaks as soon as 15 minutes after they start.
Finding leaks that leave no visible evidence
The above image is a great example of a roof leak that appeared during an inspection on a rainy day. This leak had no visible evidence because of how new it was, however, the thermal imaging picked it up easily.
This image saved the buyers thousands of dollars in repairs that they did not have to pay for.
The reason it works is that water coming through a roof doesn’t stain a ceiling right away. It soaks into the decking and insulation first, and it can sit up there a good while before anything shows on the drywall where anyone would notice. What the camera picks up is the temperature difference, because wet material holds and releases heat differently than the dry material around it.
Telling active leaks from old stains
In an opposite scenario, when used in a home that already has stains, thermal imaging is able to pick up areas of high moisture indicating that the stain is still wet and that the leak may still be active. Or confirm that repairs have been successful and the area is dry. This one comes up a lot, because a ceiling stain on its own tells you almost nothing. It could be an active leak, or it could be something that was fixed properly six years ago and just never got painted over. Those two situations are worth very different amounts of money in a negotiation.
So to answer the question, If the inspector is using thermal imaging the rain can help the inspector see any newly formed leaks and verify whether or not existing stains are active leaks. If they aren’t using thermal imaging they are likely missing these problems.
This is why Panther Inspections uses thermal imaging on all of our inspections at no additional charge to our clients. There’s a fuller breakdown of what the camera can and can’t do, including its limitations, on our thermography page.
If you are curious to see more of what thermal imaging can do check out our other posts here.
If you have water stains and want to know more about them, a thermal imaging consultation could be the solution for you.
If you or a friend are looking for a great home inspection with the added peace of mind that thermal imaging provides and a whole host of other options, look no further.
Updated July 2026








