Investigation of Using Aerial Infrared Thermography for Locating SubsurfaceMoisture in Built-Up Roofing

摘要

This theses investigated the use of aerial infrared (IR) thermography forlocating subsurface moisture in built-up roofing. A case study approach was used where several aerial infrared surveys were examined to determine the capabilities of an aerial survey compared to several other non-destructive test methods. The relative cost, the quality of data possible, and the limitations and shortcomings of using infrared from the air were also studied. Several experts in thermography were consulted for further information and recommendations. Overall, the high-resolution infrared cameras and techniques used in the selected surveys demonstrated an outstanding ability to locate moisture in built-up roofing from as high as 1500 feet. The cost of aerial IR is usually the least expensive non-destructive technique for finding moisture in large areas (1 million square feet or more), and an aerial IR survey can rapidly examine an entire base in one night. Infrared can accurately locate areas of moisture damage that cannot be seen from a visual roof survey. The information from IF makes early identification of roof problems possible so repairs can be performed, thus extending the life of built-up roofs and reducing the number of costly roof replacements. Keywords: Case studies, Flat roofs, Aerial photography. (KR)