We compare a pass-by thermography methodology with traditional walk-through thermography for building defect detection.

Results illustrate how fewer building defects are detected using walk-past thermography compared with walk-through.

Key constraints to walk-past thermography were identified and found to have a detrimental impact on image interpretation.

Trends in defects were identified using walk-past thermography on dwellings with similar construction.

A greater number and variety of defects were detected from inside dwellings than were detected from external inspections.