27 March 1984 A Comparison Of Infrared Flyover, Infrared Walkover, And Visual Inspection Techniques For Detecting Roof Moisture Anomalies
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Abstract
This paper compares results of aerial infrared, infrared walkover, and Air Force visual inspection techniques for assessing the condition of built-up roofing systems. The two infrared techniques focus on locating thermal signatures indicating subsurface moisture damage. The visual inspection method rates visible surface defects, which may represent current or potential sources of moisture damage. The subject in this case was an 8.8-acre factory/warehouse roof in Danville, Illinois. Results of aerial and walkover infrared inspections corresponded strongly for large anomalies, but diverged on smaller ones. Roof Condition Index ratings from the visual inspection did not correlate significantly with the percentage of roof area judged suspect by either the aerial or walkover infrared inspection.
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Karen B. Ourts, Karen B. Ourts, Jay G. Vanier, Jay G. Vanier, Donald E. Brotherson, Donald E. Brotherson, } "A Comparison Of Infrared Flyover, Infrared Walkover, And Visual Inspection Techniques For Detecting Roof Moisture Anomalies", Proc. SPIE 0446, Thermosense VI: Thermal Infrared Sensing for Diagnostics and Control, (27 March 1984); doi: 10.1117/12.939151; https://doi.org/10.1117/12.939151
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