It is our policy to clean a fireplace or heating flue only when there is a significant buildup of soot or creosote. When we clean a chimney, a full chimney inspection is part of our service. We check the fireplace mortar, the ash dump, the damper, the smoke chamber, and the flue. We check the outside: the mortar joints, the bricks, the flashing, the crown, the caps, and the flues. We go to the basement and check the ash cleanout door, the vent pipes leading from the heating appliances, and the base of the heating flue.