How Far Above Roof Does Chimney Pipe Need To Be

The chimney must extend at least 3 feet above the highest point where it passes through the roof and be at least 2 foot higher than any part of the building within a horizontal distance of 10 feet figure 2.

How far above roof does chimney pipe need to be.

The chimney must extend at least 3 above the highest point where it passes through a roof. If you ve been researching class a chimney pipes you ve probably heard of the 3 2 10 foot rule numerous times. They intend to make sure that the chimney draws properly and that a fire hazard does not occur. Exactly code dictates but here 3 foot is safe or less remember the chimney must be blocked off other than the stove pipe on the interior as well as the roof.

The top of the chimney should be at least 3 ft 0 92 m above the roof surface. Specifications aren t there to merely cause you problems. Vertical blue line along the left side of the chimney in our photo. Determine the number of chimney pipe lengths required.

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. This rule refers to the proper height of the chimney pipe above the roof. The top of a chimney pipe must extend at least 2 feet above the peak of the roof if the pipe is within 10 feet of the peak.

And at least 2 higher than any portion of a building within 10. Other factors can influence the necessary height of the chimney such as house stack effect and high altitude. 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. Keep in mind that there is generally a minimum chimney height requirement for the overall system usually 15 feet which sometimes includes connector pipe that can affect the finished height of your chimney system.

If the pipe is farther than 10 feet from the roof peak it must be 2. If not since the brick is hard to heat youll get a reverse draft and wake up dead.