The answer to 'average cost of flashing' is that the cost can vary widely depending on several factors. Flashing is a critical roofing component that seals the edges and joints of a roof to prevent leaks, and the cost to install or replace it can range from a few hundred dollars to over a thousand dollars or more.
The main factors that influence the cost of flashing include the size and complexity of the roof, the type of flashing material used (such as aluminum, copper, or stainless steel), the accessibility of the roof, and the labor rates in your local area. Homeowners should always get multiple quotes from reputable roofing contractors to get an accurate estimate for their specific project.