What are all these things on the roof?
https://www.google.com/maps/@42.3490475,-71.0801335,86a,35y,338.06h/data=!3m1!1e3
@kgjenkins In 2023 they had flags up on a dark gray roof material, and in Spring/Summer 2024 it's a light gray roof. I would say the Google image is from somewhere in between, where they're in the middle of replacing the roof underlayment.
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@ian @kgjenkins Yes, I think (70% sure) these are plastic carrier bags full of old roofing.
@vruba @ian This seems about right. At first, I thought they were duffle-bag sized, but now realize they are the size of a small car.