08/12/2026
What you’re seeing in this infrared scan is the temperature differential between wet and dry areas of insulation.
In this video, the hot spots you see across the roof are areas where moisture has become trapped within the insulation boards.
Throughout the day, the roof absorbs heat from the sun. Dry insulation cools relatively quickly after sunset, while wet insulation retains that heat longer, creating a measurable temperature differential that shows up clearly in the infrared imagery.
That temperature difference allows us to identify areas of suspected trapped moisture that would otherwise be invisible from the surface.
This is what makes infrared such a powerful diagnostic tool. We’re not just looking at the roof surface; we’re looking at how the roof is behaving underneath it.