WolfSpyryt: That is super good information. I was planning to work the topside from the roof, then position myself to a ladder for the underside. I will adjust my installation plan to your method. I do plan to use a roller to remove any air bubbles although this sounds difficult too but I will try it and report back when I am complete. For sure, one must be patient, minimal winds, and no rain on the forecast(at least for the daytime).
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