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It’s not the holes for the cables that are the problem. It’s the anchor screws that mount the panels to the roof. If you’ve ever installed shingles on a roof yo
by throwuwu 4y ago
It’s not the holes for the cables that are the problem. It’s the anchor screws that mount the panels to the roof. If you’ve ever installed shingles on a roof you would know that you have to be careful to cover all of the nail heads with the next row of shingles and preferably use roofing tar as well to get a good seal. The anchor screws for solar are supposed to only go into the rafters below the roofing but anyone can tell you that is hard to do 100% of the time on an existing roof even if you are being meticulous and judging from the installs I’ve seen most solar installers aren’t.