Residential Chimney Height Above Roof

Specifications aren t there to merely cause you problems.

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. The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures. And at least 2 higher than any portion of a building within 10. Degrees the height of flue or chimney stack will need to be at least 1800mm above the roof when not close to the ridge.

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. For most small structures like small cabins and tiny homes the tallest part of the structure is within 10 of the chimney. They intend to make sure that the chimney draws properly and that a fire hazard does not occur. 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.

This specification makes sure steep roof slopes are cleared. 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. For gas vents or a type l vent this distance above the roof surface must be at least 2 ft 0 61m. The 10 foot rule explains the clearance you need.

The top of the chimney should be at least 3 ft 0 92 m above the roof surface. Vertical blue line along the left side of the chimney in our photo. 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. 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.

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.