Q Am I right that when sections of plaster break away from the lath, an accepted repair technique is to roughly fill in those gaps with drywall and then drywall over the whole wall or ceiling? — M.H., ...

Q: Last spring, my roof sprang a leak and water stained the ceiling in my daughter’s second-floor bedroom. We fixed the leak and repainted the ceiling. However, now the new paint is cracked and, ...

If your ceiling drywall is sagging between joists, sometimes called "pillowing," it's probably on the top floor and attached to the roof trusses. If so, there's a good chance the installers used ...