Every masonry, metal, or other chimney shall remain adequately supported and free from obstructions and shall be maintained in a condition which ensures there will be no leakage or backup of noxious gases. Every chimney shall be reasonably plumb. Loose bricks or blocks shall be rebonded. Loose or missing mortar shall be replaced. Unused openings into the interior of the structure must be permanently sealed using approved materials.
City Code Section