Hi,
I was told at the keystone plant not to worry about getting on the roof, I weigh 250 also. They had three guy's up there walking around when they wore working on my roof. I am sceptic about using the ladder though, I use an extention ladder and wrap the meatal parts of the ladder with foam so not to scratch the siding with the ladder. Some spring is normal, I wouldn't worry about it. I wouldn't use WD-40 up there, as the others said. Becareful when your up there washing that roof, it gets slippery, and it's a long way down.
Bill
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