The answer to 'flashing leaking' is that flashing is a common source of roof leaks. Flashing is the metal or plastic material used to seal the joints and edges of a roof, like around chimneys, vents, or skylights. Over time, flashing can become damaged, cracked, or come loose, allowing water to seep in and cause leaks.
Some common symptoms of flashing leaks include water stains on ceilings or walls, mold or mildew growth, and visible gaps or cracks in the flashing itself. To fix a flashing leak, the flashing may need to be repaired or replaced, and the surrounding area may need to be resealed. While some minor flashing repairs can be done as a DIY project, it's usually best to call a professional roofing contractor, especially for complex or hard-to-access areas.