Infrared thermal imaging is not effective on heavy gravel ballasted single membrane roof installations from above or below the roof deck. Results from such an inspection will be misleading at best and typically worthless. Meaningful moisture assessment of a heavy rock ballasted roof system is best accomplished utilizing nuclear survey equipment. Click here for more information.
— R.W. – Senior Regional Field Operations Manager – National Roofing Products Manufacturer and Contractor – Read More Client Comments
Infrared roof moisture discovery is a transition game – played in the evening as a roof cools or during the day as it heats ….. Here is how the evening version works:
In the hands of an experienced thermographer, a thermal imager can clearly distinguish and record a digital “picture” or thermograph of the areas of temperature difference. The day game is just the opposite with an infrared scan for areas that heat slower because the mass is higher and therefore appear cooler.
The three representative images below are of the same finding on a recent project
Evening Infrared image Lighter= warmer/wet below
Morning Infrared image Darker=cooler/wet below
Photo of outlined area Moisture testing underway
Prior to making thermograph and photographic images for the report, we mark an outline and numerically identify the warmer and likely wet area so that the location may be easily found for later examination and possible surgical repair. The marked and numbered areas are typically included on an overall drawing of the roof surface as well as included in a numbered table of findings, finding sizes and type of confirmation testing utilized.