Flat roof

All chimney terminations must extend a minimum of 3 ft. above the roof line. If the chimney will be within a horizontal distance of 10 ft. of the parapet wall, the chimney must extend at least 2 ft. above the wall. This same rule must be followed if the chimney will be within 10 ft. of an air conditioning unit or another chimney.

If you have a chimney chase, a 2 in. minimum horizontal distance from the chimney must be maintained on all sides. Also, the chimney must extend a minimum of 1 ft. above the chase.

Pitched roof

All chimney terminations must extend a minimum of 3 ft. above the roof, and must be at least 2 ft. above the peak of the roof if within a horizontal distance of 10 ft. from the peak. This same rule must be followed if the chimney will be within 10 ft. of an air conditioning unit or another chimney.

If you have a chimney chase, a 2 in. minimum horizontal distance from the chimney must be maintained on all sides. Also, the chimney must extend a minimum of 1 ft. above the chase.