I had a roof leak; the water came in through a moderately sloped ceiling, right at the joint between two pieces of drywall. The damaged area is about 18" long by about 4 wide. I'll have to remove the old tape and dig out the damaged stuff; I don't yet know whether I'll have to put any backing in but I'm hoping not. Do I also need to re-tape the area or just patch it? (FWIW, I got a roofer in to do a repair; it's been more than two months now and no leaking, so I'm taking the chance that it's OK to patch now.

I'm getting estimates to drywall a garage with vaulted ceiling (2:12 pitch, 12' at peak) and one company in particular is more than twice what another company quoted because they said they would need to build scaffolding and rent a lift to do the ceiling. This sounds a little overkill for a 12' ceiling. Can't two guys lift a 4x8 sheet of 1/2" drywall into place safely using a couple 8' step ladders? How high do those manual lifts raise? Isn't there a trick to hanging drywall on a vaulted ceiling without scaffolding and a lift? E.g. installing a temporary furring strip on the downhill side to hold half the sheet as you hang each successive coarse? They quoted nearly 10k to drywall a 325 sq ft garage. Insane.