The last roof I got on that was any steeper than that was in Florida about 5 years ago. It was a two story. I put the extension ladder up got to the roof and scampered right up to the peak to check out the chimney cap and and ridge of the roof. I did not realize how steep it was until my feet were stradling the ridge. Both feet were pointed down at a very steep angle. When I looked back at the ladder where I came up a certain part of me tightened up that I think you all know what it was. With out any exaggeration it took me twenty minutes, looking like a frozen squirrel on that slope back down to my ladder. A fire ambulance was in the driveway of the home next door. Of course going back to the ladder I was on the granules that I loosened up on the way up. Every time I removed a foot or a hand I slid slightly. When I got to the ladder I was scared to death at that moment trying to figure out how to get back on to the ladder without slipping off the edge of the roof. I looked back at the ambulance next door and started laughing so hard to myself about the situation I had tears in my eyes, saying, well at least the ambulance driver might hear the thudddddddd. I finally got the b___s up to finally get to the ladder. My entire body, every muscle, every brain cell was sore for a couple of days by being so horrified as to that thuddddddd and what could have been the ramifications from it. I do not even get on an 8 inch rise unless there are valleys to go up. I do not know the height of that particular roof I was on but the first and second floors had 10 foot ceilings and there was a crawl space under the home. Tall enough. Please, I worked in construction, business owner or not and have been in so many stupid situations all my life, I know what the out come could have been. Just think clearly about your next move Ted