The answer to 'how often to replace flashing' is that flashing should typically be replaced every 10-20 years, depending on the material and weather conditions. Flashing is the thin metal or plastic material used around chimneys, vents, and roof edges to prevent leaks. Over time, flashing can deteriorate, rust, or become damaged, compromising the integrity of the roof system.
Regularly inspecting the flashing and replacing it when needed is an important part of roof maintenance. Signs that flashing may need to be replaced include cracks, holes, or missing sections. Homeowners should also replace flashing if they are getting new roofing installed or making other major roof repairs.