During the daytime, wet roof insulation absorbs much more solar heat than dry insulation. During the night, this “solar gain” is released as radiant heat, which is detectable with the infrared camera. Because of the difference, the “wet” areas will maintain heat energy longer than other areas, providing our Infrared Thermographer with a clear picture of the damaged areas. We provide a written report that includes infrared images and digital photos of each “anomaly” or fault found during our visit.