Infrared thermography (IR) is a home inspection method that uses thermal imaging equipment to detect infrared energy in a room.
Different objects and substances emit varying levels of infrared energy. Infrared light, unlike visible light, is not detectable with the human eye. It is on the invisible end of the electromagnetic spectrum due to its longer wavelength.
Thus, an inspector uses an infrared camera to detect thermal infrared emissions. This will display temperature variations inside the home using a color gradient. With this method, the inspector will be able to spot potential issues based on the heat variations inside the house.