How Thermal Imaging is used for Roof Inspections

  How does your commercial roof look? On the surface, it may seem like your roof is in excellent condition, but many would be shocked to learn that their flat roof has minor leaks that could lead to mold, rot or even structural damage.

We utilize the latest technology to get the most information about your roof system. The most common tool we use is thermal imaging or infrared imaging. Thermal imaging allows us to see what is happening under the roof membrane.

The last thing you want to do is trap moisture into your roof system. By using thermal imaging on commercial roof surveys, we can see if there is moisture present under the roof membrane and make the best decision on how to proceed with your roofing project.

  Before we re-roof over any existing flat roof , we always do scans to make sure there are no issues. As long as repairs do not exceed more than approx. 50% of the roof it should be good to proceed. This is done as a separate proposal prior to a formal submital.

  Infrared Moisture Surveys give us the ability to see what is happening under your roof’s membrane without having to damage your roof system. We perform a comprehensive roof analysis by inspecting conditions, establishing roof assembly through core samples to determine if the project will be an overlay, coating, or tear-off, and measuring roof area square footage.

  At P.L. Hurley Roofing Systems we have performed many thermal roof surveys for our customers, and I always go with the inspector so I have a clear understanding of any potential problems on a clear night to get the best reading.

There needs to be precise conditions for an infrared moisture survey to be successful:

  • Flat or low-sloped roof

  • The clean and dry roof surface

  • Mostly sunny and warm during the day

  • Little to no wind

  • Clear night

What Does a Thermal Image Show?
You can see what is happening under the roof surface by the colors that appear on the imaging – whether it is a photo or video. Here are some photos of thermal imaging:

When looking at these images, you can see the color differences

  • Cool Colors – Blues and Purples

  • Warm Colors – Yellows, Reds, and Oranges

The areas in the photo that are shown in warm colors are areas of the roof that are holding in the heat from the sunlight during the day. The brighter, warm colors signify the more moisture that is underneath the membrane. As you can see in the photos above, these roofs need some work.


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