>If you need to do yearly maintenance on your roof, consider adding ring bolts to the eves, then when you are up there just tie off your ladder. Even a ladder sliding when you are 3 foot high can break a bone I used to do network cabling and I had an assigned apprentice, he was too dumb to know not to fidget, and that was the last time I was dumb enough to trust anyone else with my safety Great thoughts. Thank you.