Building & Roof Thermography
Residential Roof Thermal Inspection - Day & Night Comparison
Aerial thermographic inspection of a residential roof performed during daytime and after sunset. Comparative thermal imaging identified areas with abnormal thermal behaviour, demonstrating how inspections at different times can help distinguish between possible moisture-related anomalies and other subsurface conditions such as air pockets or membrane delamination.
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Project Details
MIH Advanced Aerial Inspections performed an aerial thermographic survey of a residential roof to investigate areas exhibiting abnormal thermal behaviour.
Thermal images were acquired during daytime conditions and the inspection was repeated after sunset to evaluate how the identified areas responded during heating and subsequent cooling.
Several localized areas appeared warmer than the surrounding roof during the daytime inspection. In the post-sunset survey, these same areas exhibited a cooler thermal response relative to the surrounding surface.
This change in thermal contrast provides valuable diagnostic information. Rather than relying on a single thermal image, comparing the roof during different stages of its thermal cycle helps differentiate between potential causes of an anomaly. In this case, the observed behaviour was considered more consistent with possible trapped air or localized separation beneath the waterproofing membrane than with a straightforward moisture indication.
The findings demonstrate the value of aerial thermography as a non-contact screening technique for identifying areas requiring closer investigation. Thermal anomalies should be correlated with construction details, environmental conditions and, where necessary, targeted physical inspection before a definitive diagnosis is made.
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