A thermographic survey is undertaken using thermal imaging cameras, which detect infrared light that is not visible to the human eye. Everything above absolute zero emits infrared light, and as a result it is possible to detect variations in the temperatures of different surfaces.
This can in turn help identify anomalies such as damp ingress, cold bridging, air infiltration and missing thermal insulation in buildings. It is a particularly useful inspection technique because it is completely non-invasive, and enables large areas of walls, ceilings and floors to be inspected safely in a relatively short period of time.
