How To Calculate Fireplace Chimney Height Above Roof - Building Code Tips

Here's a reference for similar building code.

R1003.9 Termination. Chimneys shall extend at least 2 feet (610 mm) higher than any portion of a building within 10 feet (3048 mm), but shall not be less than 3 feet (914 mm) above the highest point where the chimney passes through the roof.

[willbass]

Very timely video.
I'm sure lots of folks are considering wood stoves/fireplaces in face of escalating cost for electric & nat gas.
Thanks for posting this.
Definitely going to 👍 & save for my reference.

[khalidhasan]

I love videos like this! Makes Architectural-life much more simplified, no doubt!

[ttfweb]

I know “2 feet above 10 feet out, minimum 3 feet” has been around since I did masonry in the 80’s. We always ran the brick to this, then the cap and flue were extra - as you said, good for draw.

[ruphleswyatt]

Thank you sir taking a test tomorrow this helps me understand 503.5.4 in the IFGC

[Paul-wrfk]

@jimb4050 UL has determined a 15 ft. minimum height above the top of the firebox. Also so the flue pipes area should be at least 1/12th of the firebox opening for round pipe. 1/10th of square pipe. 1/8th of rectangular pipe. (Pii) 3.14 x 4.25squared =56.71625 sq. Inches of area for your 8.5" pipe. So check your total flue height. And your openings sq. Inch area. Hope that helps!

[carlwighton]

So regs for UK are 2300mm outlet horizontal to meeting the roof. If it's within that it needs to be 600mm higher. Same principle for twinwall flues.

[BlumpkinSpiceLatte]

So is there a maximum reasonable height for the chimney? If I were to, for instance, put a chimney 10 feet from the ridge of a 12/12 roof, the standard formula says it would be a 12 foot chimney, needing a bracket at 60". I haven't seen anywhere about a bracket higher up than 5", but I'd be more than doubling it so would I need a bracket and is there an upper limit to this formula's application? 12 feet above the roof sounds crazy tall...

[jimb]

My fireplace smokes into the house. The chimney is 5' high and farther from the ridge than 10'. It has a metal chimney, double wall, but the inside wall is 8 1/2 inches. Could that be the problem? thanks, Jim

[gurtwuf]

Appreciate the video. Question. I have seen pellet stove exhausts that protrude directly out of a houses siding. However my pellet stove exhaust has to comply with chimney codes as shown in your video. Is there a reason for that? Apologies if this is a dumb question

[nakosmiltiadis]

Hello and thank you for your videos .Is there a rule that tell us in what distance, a tree or taller buildings next to us, starts to effect our chimney?

[claytonroberts]

So if you make it 4'6" higher then the ridge of the roof you should be all good ?
But I still have smoke going into the neighbor's house. What to do?

[SonFIower]

my neighbor converted their garage and installed a woodturning stove. the chimney does not rise above my roof making the smoke from the chimney enter my house. how do I find out if there is a building code? this shouldn't be allowed!