FYI.....
When I installed my flexible panels, I put down these corrugated plastic sheets with 2-sided Eternabond.
https://www.homedepot.com/p/72-in-x-...-202771364-_-N
The flexible panels have 6 brass grommets around the edge so I installed some threaded mounting posts to the back of the corrugated panels so I could screw the panels into place with stainless screws.
This way I did not have to drill into the roof to mount the panels. The corrugated plastic base is permanently attached with Eternabond and they provide a little heat dissipation as well since air can flow through the corrugation. If I ever need to replace a panel, it will be a 5-minute job to remove 6 screws.
My original install was to use Eternabond to tape them directly to the roof but this way works out much better if they need to be removed.
Here are some pics.....
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