Over the weekend, we had a bit of a situation develop. Apparently, our window AC in the back room was tipped forward slightly such that all the condensation it accumulated while running overnight ended up dripping into the room. From there, the water made its way to the kitchen ceiling, which is made up of 1-foot square fiberboard tiles (aka sponges) made to look like a tin ceiling. Two tiles fell on their own and several others needed replacement (see photo). I have since gotten all the tiles replaced. Next will be caulking the seams and painting. Should look as good as new ...