The thermal imaging camera detects the infrared energy emitted by all surfaces, converts this into temperature and lays the colour coded distribution of the values into a frame – also overlaid onto a digital image.

The most useful applications of thermography in existing buildings are:

  • To determine positions of concealed structural arrangements (timber frame behind a render or joists above a ceiling for example),
  • To record distribution of heat variation for environmental studies.

The evaporation of water from a surface will produce a cooling effect which can be detected by infrared analysis. As such, a thermal imaging camera can ‘occasionally’ be useful in the diagnosis of damp.