How High Should Chimney Be Above Roof

Taller chimneys make more draft but chimneys exposed to outside cold don t.

How high should chimney be above roof.

There are strict codes that govern chimney placement for fire safety reasons. The height of the chimney above the roof surface measured at the up slope side of the chimney from the roof surface to the chimney top should be at least three feet the green line in our photo. Specifications aren t there to merely cause you problems. This is a bit of an odd measurement and chimney clearance case because the chimney side is actually about 8 away from the roof edge.

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. The chimney should extend at least 3 feet above the roof surface it penetrates and 2 feet higher than any roofline or other obstacle within a horizontal distance of 10 feet. For most small structures like small cabins and tiny homes the tallest part of the structure is within 10 of the chimney.

Two things determine chimney draft. A chimney should be at least two feet above the highest roof point. They intend to make sure that the chimney draws properly and that a fire hazard does not occur. 2 build the chimney taller than the tallest part of the house.

The chimney must extend at least 3 above the highest point where it passes through a roof. Flues that are more than 3 metres away from the highest part of the roof need to be 1000mm above the flue penetration. Flues need to be 600mm higher than the highest part of the roof within 3 metres. Brace the chimney if necessary.

If the pipe is farther than 10 feet from the roof. Chimney height may need to be increased by 2 3 per 1000 feet of elevation although added height generally equates to stronger draft there is a point where the system can become too long and over drafting might occur. Homes built on varying terrain have their own set of chimney and flue regulations.