How Tall Chimney Above Roof Line

Don t try this at home and certainly not when there are people below or when the flue is in use or probably any other time.

How tall chimney above roof line.

For most small structures like small cabins and tiny homes the tallest part of the structure is within 10 of the chimney. If your peak to penetration distance is 7 feet you would have a rise of 28 inches. However in most cases it will be around 3 metres. A 20 foot tall chimney draws twice as well as a ten foot tall chimney.

Bottom line the height. The chimney must extend at least 3 above the highest point where it passes through a roof. Pushing gently on a tall flue like this should not produce easy movement. 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.

What is the 2 foot 10 foot 3 foot rule. So 28 inches plus 24 inches is a chimney height of only 52 inches. The chimney in our photo above left rocked and nearly fell over when we leaned on it a bit while climbing onto this roof. Inside the flue each cubic foot of which is lighter than a cubic foot of cooler ambient air.

Code requires that a chimney be three feet above the roof where it exits and two feet higher than any part of the roof within ten feet. Positing a chimney on the home relative to the rest of the home may cause it to draw better. The maximum freestanding stack height above the roof for a traditional masonry chimney is 4 5 times the narrowest horizontal part of the chimney. This will generally cause you fewer problems as a homeowner.

If the pipe is farther than 10 feet from 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. 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. In the case of stainless steel system chimneys the manufacturer s installation instructions should be consulted.

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. Prompted by a question from a csia certified chimney sweep ashley eldridge in his 21st year as the chimney safety institute director of education talks ab.