How High Chimney Above Roof Line

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.

How high chimney above roof line.

The 10 foot rule explains the clearance you need. Taller chimneys make more draft but chimneys exposed to outside cold don t. Flues need to be 600mm higher than the highest part of the roof within 3 metres. 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.

Other factors can influence the necessary height of the chimney such as house stack effect and high altitude. 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. For most small structures like small cabins and tiny homes the tallest part of the structure is within 10 of the chimney. Homes built on varying terrain have their own set of chimney and flue regulations.

They intend to make sure that the chimney draws properly and that a fire hazard does not occur. Anon the chimney outlet needs to not only be proper height above the roof surface but proper distance from any opening that could take flue exhaust. Specifications aren t there to merely cause you problems. And at least 2 higher than any portion of a building within 10.

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. This means that below 38 degree roof pitches that the height of the flue outlet should be at least 1800mm above the roof when not close to the ridge and above 38 degree roof pitches the flue outlet height should be 2300mm horizontally back to the roof flue height figures are given in the table above where the flue is 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. 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.

If the pipe is farther than 10 feet from the roof. Two things determine chimney draft. 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. Degrees the height of flue or chimney stack will need to be at least 1800mm above the roof when not close to the ridge.