Thermography is an imaging technique that depicts by means of thermal camera the otherwise invisible heat radiation (infrared radiation) of an object.

Thermography is used in the building industry for the inspection of the thermal envelope. Possible leaks in the airtightness or in the insulation can be shown and solved for both new buildings and remedial measures prior to completion. This can avoid later damages (Increase of the building damage-freedom potential). It leads to an enhancement of thermal and humidity protection, and thus to energy savings for the building users.

Thermography can show vulnerabilities (thermal bridges, damp walls, leaks) also for existing buildings. Moreover, it can be used to test the efficiency of building services, or for the hydraulic balancing of heating systems.

Thermography is often combined with a test for air tightness (Blower Door Test) for the localization of flaws in buildings.