The water will not show up if the conditions are not correct. If the outside and inside of the building is at the same temperature, water behind the wall will look the same to an infrared camera as the wall itself. On the other hand, if it is cold outside and the house is warm inside, the water will be evaporating which will make the water cooler. This cooler area which will show up nicely on an infrared camera. After spotting possible moisture, we use a non-invasive moisture meter to confirm the location is moisture.