The answer to 'how to repair flashing repair' is to properly inspect, clean, and reseal roof flashing to prevent leaks and water damage. Flashing is the thin metal or plastic material installed around roof penetrations, edges, and joints to create a waterproof seal. Over time, flashing can become damaged, worn, or loose, allowing water to seep in and cause problems.
To repair flashing, first locate any areas where the flashing is cracked, lifted, or not properly sealed. Clean the area thoroughly with a stiff brush and degreasing cleaner. Apply a high-quality roofing sealant or roofing cement to the edges and joints of the flashing to create a new waterproof seal. You may also need to replace any severely damaged flashing pieces. Be sure to follow the manufacturer's instructions carefully and allow the sealant to fully cure before inspecting your work.