Thanks “Roadboss” for the quick reply. The question of the flashing for the flat roof… There is an adjacent wall.
Contract 1 reads…base (“L”) flashing where necessary.
Contract 2 reads…"Flash wall and applicable details with one modified bitumen cap sheet, install and seal termination bar and metal counter flashings as needed.
You want to go with option 2. Contractor’s that use L-flashing are more interested in doing the job quickly, not necessarily doing it right. With that said, there are some instances where you have to use L-flashing, but since someone gave you another option I have to assume your job isn’t one of those situations.