Went to a costumers home (about 35 years old) to estimate some work. Noticed that nearly all the ceiling drywall sags. A 5 foot straight edge across the ceiling drywall showed 3/4 gaps in many places. On entering the rooms and looking up it was quite obvious. The funny thing was that along the long tapered edges the drywall looked tight against the ceiling joists but in the middle of the tapered edges was the maximum sag. Enough fasteners along the edges but not enough in the middle?
The costumer is trying to get the house ready for sale. If I was looking at the house the sagging drywall would be a big question mark. What can be done in this situation short of new ceiling drywall? Would you try and stabilize the drywall with extra fasteners, spackle, and paint?
Thanks for any help or suggestions.