Thermographic imaging information
Basic Science
All objects emit a certain amount of radiation depending on the object's surface temperature. A thermographic camera is an electronic device that can 'read' this thermal radiation and display an object's temperature on the camera's screen. The camera screen shows the temperature of various surfaces using different colours to represent different temperatures: the brightest (warmest) parts of the image are usually coloured white, intermediate temperatures are coloured red and yellow, and the coolest parts are coloured blue. A scale on the side of the screen shows what colours represent what temperatures.
Infrared cameras can identify problems that can't be seen with the naked eye. This eliminates the need to break open up walls, roofs, etc. which can be very expensive and disruptive.