The answer to 'signs of flashing repair damage' is that there are several key signs that indicate your roof flashing needs repair or replacement. Flashing is the thin metal or plastic material used to seal and waterproof the joints and edges of your roof, and when it becomes damaged, it can lead to leaks and water damage.
Some common signs of flashing repair damage include cracks, splits, or holes in the flashing material, loose or missing flashing around chimneys, vents, or skylights, and visible rust or corrosion on the flashing. You may also notice water stains, mold, or rotting wood around the areas where the flashing is installed, which can be a sign that the flashing is no longer effectively sealing those joints.