Thermal Imaging for Facades

Thermal imaging (infrared thermography) detects temperature variations across facade surfaces that indicate concealed defects. Moisture trapped within wall cavities, behind cladding, or beneath render absorbs and releases heat differently from dry materials. Delaminated tiles and render lose thermal contact with their substrate and display distinct temperature patterns. Thermal bridges at fixing points, floor slabs, and structural elements conduct heat faster than surrounding insulation. All of these conditions are invisible to the naked eye but clearly visible in thermal imagery.

We deploy calibrated radiometric thermal cameras (typically FLIR T660 or equivalent) from rope access, EWP, drone platforms, and ground level. Each thermal image is captured alongside a standard visible-light photograph for direct comparison. Images are processed to extract quantitative temperature data rather than just qualitative colour maps. Temperature differentials are measured and compared against thresholds that indicate specific failure mechanisms.

Thermal imaging is most effective during specific environmental conditions. Ideally, the facade should have been heated by direct sun for several hours before scanning (for solar-loaded thermography) or scanned during the early morning cooldown period. We schedule surveys to coincide with optimal conditions and will reschedule if weather does not cooperate. Rain within 24 hours, heavy cloud cover, or high wind speeds can mask thermal signatures.

Results are integrated with the 3D building model on the Facade Inspect platform. Thermal anomalies are mapped to their exact spatial location, correlated with visual defect findings, and classified by probable cause. This allows engineers to target invasive investigation (such as core sampling or moisture probing) precisely where thermal data indicates concealed problems rather than guessing locations.