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Thermal imaging is becoming an important part of building applications because it is non-invasive and fast to perform. A thermal imaging camera is being used today for heat loss, disbanding tiles, locating hidden structures, air leakage, subsurface roof moisture, peeling plaster and moisture in wall. There are many other building applications with the use of a thermal imaging camera. Sometimes all you need is the right moment to perform the inspection with a thermal imaging camera. For instance, by waiting for solar radiation to create the necessary thermal contrast, or arranging the heating by using a big hot air gun or a set of lamps. Greater differences in temperature yield clearer thermal imaging photos. In this case I used my thermal imaging camera to look for a rather large leak from the main discharge pipe of my flat (apartment) that had caused the wall in the basement to become completely soaked. The affected area was rather large, and would have been expensive to replace if I had not pinpointed the problem area. The large area made it particularly difficult to find the problem pipe with my thermal imaging camera. To create the necessary thermal contrast, I used hot water from the plumbing. This way, my thermal imaging camera can detect the temperature difference much more clearly.