I’m a newbie, constructing a “lean to”. Here’s my plan. I’m going to bolt a 2x6 stringer to the side of my garage and run rafters out to the end of my concrete pad to another stringer on 6x6 posts. After I do the framing and install “barn metal” corrugated sheets on the roof I’m not sure how to flash by the building edge. I’m not sure if I should cut the vinyl siding back all the way to the top edge of the stringer so it sits recessed and flat against the building or just trim the step out of the siding so it sits flat. Either way I don’t know how to keep water from blowing up the roof and leaking behind the stringer and down into the building. Does anyone have some recommendations as to what methods of flashing/sealing can be used. Any advice would be appreciated.