I don't have any leaks but one thing I've observed after replacing some caulking that had come loose when washing the roof off was that the mere fact of walking on the roof will break the caulk seal every time. The roof flexes quite a bit when you're on it but the caulk doesn't. It seems to stick to the roof material, just not to the plastic strips.
It would be nice if the roof sections were one piece. Not sure why they couldn't be.
Phil
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