Roof Moisture Surveys at Pease AFB, New Hampshire, and Offutt AFB, Nebraska.
Final rept. Mar-Jun 76,
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
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A new technique for surveying roof moisture was applied at Pease AFB, New Hampshire, and Offutt AFB, Nebraska. The technique consists of using airborne thermal infrared IR imagery to rapidly examine all built-up roofs on an installation, and a nuclear moisture meter to examine in detail on the roof roof areas identified on the IR imagery to have possible entrappped moisture. The results of the surveys at these two Air Force Bases show that the survey technique is a very effective means of detecting roof areas with entrapped moisture. Twenty-three of the 238 buildings examined with thermal IR imagery were suspected to have areas with entrapped moisture. Detailed surveys with the nuclear meter showed that 14 of the 23 buildings had entrapped-moisture problems. The presence of elevated roof structures, vents, and standing water caused anomalies initially suspected to be due to entrapped moisture on several buildings. Prior knowledge of the existence of these features would have significantly reduced the number of misinterpretations. It is recommended that an initial draft of a manual for operational application of the thermal IR-nuclear meter roof survey technique be prepared.
- Structural Engineering and Building Technology
- Infrared Detection and Detectors