how much does it cost to have a chiney flashed
1 On average, flashing a chimney can cost anywhere from $250 to $1,000. 2  The size of the chimney and the geographical location will play a rather large factor in the overall price tag.3  A sloped asphalt chimney job could cost anywhere from $250 to $600, while a flat built-up chimney could cost $400 to $900.he price for flashing a chimney depends on the type of flashing that will be done to the chimney, the type of metal sheet used, and the contractor that will perform the job. How much is it? 1  On average, flashing a chimney can cost anywhere from $250 to $1,000.