I would agree with therink. Ours has minor ripples. Not like yours. I would contact your dealer and Keystone. It could develop into a serious problem. If they won't do anything I would check it frequently to make sure it doesn't get any worse.
We had a Rockwood 5th wheel that the roof delaminated. It was much worse than yours. Forest River repaired it the 2nd year of ownership.
Good luck.
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