Drone with Infrared thermography technology gives you the opportunity to see where you have (or will) have issues when you eyes cannot see from your height!
FYI: ”Thermogram of a traditional building in the background and a “passive house” in the foreground Infrared thermography (IRT), thermal imaging, and thermal video are examples of infrared imaging science. Thermographic cameras usually detect radiation in the long-infrared range of the electromagnetic spectrum (roughly 9,000–14,000 nanometers or 9–14 µm) and produce images of that radiation, called thermograms. Since infrared radiation is emitted by all objects with a temperature above absolute zero according to the black body radiation law, thermography makes it possible to see one’s environment with or without visible illumination” (source Wikipedia).
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