An infrared moisture survey can be performed utilizing a FLIR Infrared Scanner. With these thermal imaging cameras, we are able to see where moisture is trapped within the roof system. The survey is performed after sundown in order to allow thermal differences or “anomalies” to occur once the air and roof surface temperatures reach a state of equilibrium.

During the day, moisture within the roof insulation is heated and then it retains that heat into the night longer than the dry insulation. This results in thermal anomalies (areas that are warmer) that can be detected by our infrared cameras. These anomalies are then considered as suspect wet areas and are outlined on the roof surface with spray paint. Roof cores are taken in both dry and suspect wet areas to verify the instrument readings. Finally, the locations of the anomalies and the test cuts are marked on a roof plan.