A sagging ceiling rarely shows up overnight. Most of the time, it builds slowly while water works its way through your roof deck, insulation, and drywall until the weight becomes too much for the structure to hold. By the time you notice the dip or bow, the damage above it has usually been developing for…

If you walked outside after a storm and spotted bare patches on your roof where shingles used to be, that gap is not only a cosmetic problem. Each missing shingle exposes the underlayment underneath, which is built to handle short-term water contact, not ongoing exposure to rain, sun, and wind. Once that layer starts breaking…