I have two different contractors working at each end of the house putting in windows/doors, and I'd like to know which of their sealing methods is correct, or whether both of them are properly done. I asked the sliding door contractor why there is none of that caulk (or whatever that is visible on the bathroom wwindow one) between the siding and the flashing, and he said it's supposed to be open so if any water gets in it slides right down the flashing/tar paper under the siding, and doesn't trap water inside. What do you think of each way? Thanks.

Bathroom Window

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Sliding Door

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