Flue Height Above Roof Line

Degrees the height of flue or chimney stack will need to be at least 1800mm above the roof when not close to the ridge.

Flue height above roof line.

Flues need to be 600mm higher than the highest part of the roof within 3 metres. 11 12 to 12 12 4 0 feet above the roof surface continues to 21 12 pitch at 8 0 feet vent caps larger than 12 must be located at least 2 feet above the highest point and 2 feet higher than any portion of the building within a horizontal distance of 10 feet. If the pipe is farther than 10 feet from the roof peak it must be 2. For a gas vent or type l vent this height must be 2 ft 0 61m or more.

Flues that are more than 3 metres away from the highest part of the roof need to be 1000mm above the flue penetration. This is for masonry chimneys. The top of the flue opening should be 3 ft 0 92 m above any roof surface. Back to our example over a run of 10 feet the roof would rise 40 inches.

Additionally per our rule we need to add 2 feet or 24 inches giving us a total height of 64 inches. 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. The distance between the cowl of the flue and the adjacent roof wall structure should be higher than 2 3 mtr. A vertical line drawn along the up roof side of the chimney from the roof surface to the top of the chimney flue opening shall be at least 3 ft in height.

Homes built on varying terrain have their own set of chimney and flue regulations.