Building codes require a minimum of 3 above the roof penetration and at least 2 higher than any portion of a building within 10.
How high above hip roof should duravent stove pipe be.
Measure the roof pitch.
In the photo below you can see where the braces currently attach 41 inches above the collar.
The chimney must extend at least 3 feet above the highest point where it passes through the roof and be at least 2 foot higher than any part of the building within a horizontal distance of 10 feet figure 2.
Determine the number of chimney pipe lengths required.
This will bring the total height of the pipe not including the cap to 85 inches.
If chimney is more than 4 above the roof penetration an extended roof bracket is required.
Minimum chimney height at sea level of straight vertical chimney is 10 to 15 above the appliance outlet.
A snorkel termination may be used if height restrictions prevent adequate rise above the appliance.
Subtract 1 1 4 per joint of durablack stovepipe.
Also you ll need the horizontal distance between the peak and the edge of the high side of the pipe see figure 1 where you plan your roof penetration.
Measure the roof pitch.
Hopefully this will be enough.
The termination cap is installed above that point.
To calculate the installed per length of 6 8 duraplus chimney pipe subtract 1 1 2 per joint.
This specification makes sure steep roof slopes are cleared.
The termination cap is installed above this point.
If the pipe is farther than 10 feet from the roof peak.
For gas vents or a type l vent this distance above the roof surface must be at least 2 ft 0 61m.
Determine the minimum height above the roof.
Roof pitch is easily calculated and if you don t know how read my article understanding and calculating roof pitch.
The top of the chimney should be at least 3 ft 0 92 m above the roof surface.
First you ll need to know the pitch of your roof.
The extended roof bracket consists of the pipe band the adjustable legs and the roof brackets.
Vertical blue line along the left side of the chimney in our photo.
Currently the pipe is 6 inches above the roof peak.
Distance matters 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.
For horizontal installations check the appliance manufacturer s instructions for minimum rise and maximum horizontal run.