A few weeks ago I had a leak in my roof which I had repaired. The problem started before the roof was fixed and I had water damage in the ceiling of one of the bedrooms. I used my Ryobi recip saw today to cut out the damaged drywall (5ft x 4 ft) and install a new piece. The problem popped up when the new piece was installed, I noticed that some of the old drywall is visibly sagging lower than the new piece. It's way more than can be covered with a simple mud job. Any recommendations?
I figure worst case scenario is that I gut the whole piece across and call a general contractor to install a new ceiling (the room is about 8' x 10'). Any advice you could give me about fixing my leak damaged ceiling would be welcome.