Residential Chimney Height Above Roof

If your chimney is exposed and is greater than 5 tall a roof brace kit is required to keep it supported.

Residential chimney height above roof.

And at least 2 higher than any portion of a building within 10. The minimum chimney height for fire safety is the greater of 3 ft 1 0 m above the highest point where the chimney penetrates the roofline or 2 ft 600 mm higher than any portion of the structure or adjoining structures within 10 ft 3 0 m of the chimney see fig. This specification makes sure steep roof slopes are cleared. For gas vents or a type l vent this distance above the roof surface must be at least 2 ft 0 61m.

Degrees the height of flue or chimney stack will need to be at least 1800mm above the roof when not close to the ridge. Both above the flat roof and 2 feet above the point at which a horizontal line from the chimney would touch the highest portion of the nearest roof. If you draw a horizontal line 10 the chimney will be 6 from the shingles and you need to add 2 from that mark therefore you will have a total of 8 of chimney above your shingles. The top of the chimney should be at least 3 ft 0 92 m above the roof surface.

Chimneys shall extend not less than 2 feet 610 mm higher than any portion of a building within 10 feet 3048 mm but shall be not less than 3 feet 914 mm above the highest point where the chimney passes through the roof. If the pitch of the roof is 38 degrees or greater the termination point of the flue or chimney will need to be 2300mm horizontally from the roof line and roofing material. Specifications aren t there to merely cause you problems. Most wood stove and factory built fireplace manufacturers and local building codes will require that the chimney must extend at least 2 feet above any portion of any structure within 10 feet measured horizontally and must extend at least 3 feet above the highest point of its roof penetration.

The 10 foot rule explains the clearance you need. Vertical blue line along the left side of the chimney in our photo. The chimney opening above the roof of a sticks and bricks house should be 3 feet above the roof line or 2 feet above any part of the building within 10 whichever is higher. They intend to make sure that the chimney draws properly and that a fire hazard does not occur.

The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process.