How High Should Your Chimney Be Above The Roof

But the pipe will require a 10 horizontal clearance from the roof.

How high should your chimney be above the roof.

This doesn t necessarily mean the pipe must be above the tallest part of the roof which is known as the ridge. This can cause draft problems. The maximum freestanding stack height above the roof for a traditional masonry chimney is 4 5 times the narrowest horizontal part of the chimney. For 18 feet of run you would have a rise of 72 inches.

A chimney should be at least two feet above. 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. 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. Knowing the pitch of the roof is extremely helpful in determining the height the chimney pipe must be above the roof.

The current code states that chimney openings need to be at least 300mm higher than the highest part of any roof within 3 6 metres of the chimney. If your home is at a particularly high altitude i recommend consulting a professional in your area when it comes to these particular specifications. Many people mistakenly think that the pipe always has to be 2 feet above the roof peak. In the case of stainless steel system chimneys the manufacturer s installation instructions should be consulted.

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. If the pipe is farther than 10 feet from the roof. The 10 foot rule explains the clearance you need. Easy calculation for chimney pipe height.

You are close to your eave and you find that your measurement is 18 feet from peak to penetration on a 4 12 pitch see figure 3. However in most cases it will be around 3 metres. 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. Chimneys need to be high enough to ensure that smoke is directed away from where it might be harmful to your neighbours.

This is why the rule calls for the chimney to extend 2 feet above any structure within 10 feet of the chimney.