the chimney is one of the first spots on your house to require masonry repair. The main reason for this is because it protrudes above the roof line is exposed to the elements. In addition to being exposed above the roof line at all so is venting warm and hot gases out the flue liner. In the winter months the combination of warm gases venting out of a cold masonry structure allows for condensation and moisture to come by and with the freezer and thaw cycles causing extreme damage. most chimneys meant either a furnace or a fireplace some chimneys vent both the furnace and the fireplace. On larger chimneys a dummy flu or a fake flu may be included to balance out the lows of a chimney. When it comes to chimney repair the majority of the work may be involved in the scaffold set up.
