How Far Above Roof Should Chimney Be

And at least 2 higher than any portion of a building within 10.

How far above roof should chimney be.

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. Vertical blue line along the left side of the chimney in our photo. The top of the chimney should be at least two feet higher than a level point ten feet away from a level line to the roof. Specifications aren t there to merely cause you problems.

This rule refers to the proper height of the chimney pipe above the roof. If you ve been researching class a chimney pipes you ve probably heard of the 3 2 10 foot rule numerous times. The chimney must extend at least 3 above the highest point where it passes through a roof. 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.

If the pipe is farther than 10 feet from the roof peak. They intend to make sure that the chimney draws properly and that a fire hazard does not occur. Distance matters 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. This specification makes sure steep roof slopes are cleared.

The 10 foot rule explains the clearance you need. For gas vents or a type l vent this distance above the roof surface must be at least 2 ft 0 61m. Explained the chimney pipe must be a minimum of three feet above the roof but also two feet taller than anything within ten feet.