How does Roofscan work?
Roofscan uses a professional thermal infrared camera to make the level of radiation emitted by houses visible, so that temperature variations at roof level can be determined with great accuracy. By mounting the camera vertically in an airplane, thermal imagery is captured whilst flying. All the individual images combined form a thermal map of the entire surveyed city. Roofscan is best performed in the wintertime, after sunset, when the differences between indoor and outdoor temperatures result in the best image quality.