Good Day CraigFL
we've moved in to our new location in July, this place has been recently renovated completely.
We've got the same problem so i took off the vinyl filled the empty space with spray foam cut the vinyl a fraction smaller than the window frame and it seems it solved the problem.
most likely it was pressured in @ installation and when their was wind r something it was rubbing on each other were the noise was created
Good Luck
Eric
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