I recently purchased a single-story duplex built in 1951. I will be living in one side, while the other side of the duplex is an occupied rental unit. It needs a new roof. Also, I would like to create cathedral ceilings to open up the living area. (by the way, I can't find any good resources discussing the cathedral conversion project.) I have two questions:
(1) Which job should go first, the re-roof or the ceiling conversion (or both at the same time)?
(2) Does the cathedral ceiling need to extend to the whole building, or can the rental unit stay as-is?