Hanging Drywall on a Ceiling
Snap chalk lines or draw the location of the joists on the sheets before you hoist them into position. Use 5/8-inch drywall if the joists are more than 16 inches OC. Many drywall T-squares have holes in their blades to ease marking. If yours doesn't, drill some on 16-inch (or as needed) centers.
Adding a layer of 3/8-inch drywall is an excellent way to restore a cracked or discolored plaster ceiling. Poke nails through the old ceiling until you locate all the joists (work carefully, there may be pipes or wires), then snap lines along their length. Apply construction adhesive to the back of the sheet. Use about half a tube of adhesive per sheet, applying it in S-shape beads about 1 foot apart. Fasten with 2-1/2-inch drywall screws into the joists.