How High Should Your Chimney Be Above The Roof

The 10 foot rule explains the clearance you need.

How high should your chimney be above the roof.

A chimney should be at least two feet above. 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. 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. Many people mistakenly think that the pipe always has to be 2 feet above the roof peak.

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. This is why the rule calls for the chimney to extend 2 feet above any structure within 10 feet of the chimney. Knowing the pitch of the roof is extremely helpful in determining the height the chimney pipe must be above the roof. However in most cases it will be around 3 metres.

This doesn t necessarily mean the pipe must be above the tallest part of the roof which is known as the ridge. If the pipe is farther than 10 feet from the roof. 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. 0 60m above the tip highest point of the roof but as long as it is above the roof it will work ok and not smoke how high should a chimney top be.

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. For 18 feet of run you would have a rise of 72 inches. 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. The maximum freestanding stack height above the roof for a traditional masonry chimney is 4 5 times the narrowest horizontal part of the chimney.

Easy calculation for chimney pipe height. This can cause draft problems. Let s look at a couple of examples. 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.