Old 03-21-2005, 01:36 PM
Join Date: Mar 2005
Posts: 239
Default Chimney options

> hi everybody,
> since i just finished the dome this last saturday, i myself too, feel
> that i am done building my breadoven and are now able to start
> cooking......


> i have another question however, concerning the vent and chimney?
> can i get the steel vent and flue at home depot or do i have to get it
> custom made? i know some of you just did it yourselfs, cutting steel
> and welding it together. it looks easy enough, but i don't know how to
> welt yet. (learning to weld is a project for some other time).

Yep. Home Depot carries stove pipe & chimney toppers that will work.
Get a 3' or longer pipe section (the stainless steel double-walled one
will last years & years) and a chimney top that fits on top. The
chimney top will provide a spark arrestor function.

> would a chimney of 2 feet lenght be enough or would 3 feet be better? i

3 is better as it will draw more. In fact if you can get it a foot
taller than the roof will be (within 2 feet) that's best. (The "within
2 feet means you measure out 2' from the chimney location and mark the
highest part of the roof you hit. Make the chimney at least 1' taller
than that -- it helps provide room for the draft to exit the chimney.
So in the case of mine where I've got a steeply pitched A-frame roof,
it really only had to just come out the roofing but it actually sticks
up about 10".)

> am intending on using a 8inch steel round chimney.
> also, can i use the same portland/fireclay/sand mix to cement the steel
> vent & chimney in?

Good size. I've got a 9x12 rectangular one that draws like a champ.
Any smaller than 8" may not draw quite as well so you'd want to have
more of a baffle in front of it to force the smoke up the chimney
(which will lower the front door).

> has anyone some piece of advise? what i should avoid?

Avoid the plain galvanized pipe sections. They'll outgas some nasty
stuff because this will get *hot*. They will also corrode over time
with the effect of the acidic smoke & burning galvanization...probably
only last a couple/three years. The single-wall black chimney pipe is
better (next best to clay flue liners & stainless steel double-wall).

> any advise is very much appreciated!
> thanks to all of you to get me so far
> simone
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Old 10-01-2010, 06:09 AM
mn8tr's Avatar
Join Date: Sep 2010
Location: Pearland,Texas
Posts: 116
Default Re: Chimney options

Any ideas what type of store will carry terra cotta pipe? I have been burning up google and so far no luck.
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Old 10-01-2010, 10:00 AM
dmun's Avatar
Join Date: Jul 2005
Location: New Jersey USA
Posts: 4,216
Default Re: Chimney options

Terra cotta pipe? Like drain tile? It's become increasingly obsolete since the introduction of perforated plastic pipe. There was also a glazed clay sewer pipe that's disappeared for the same reason.

Since this is an oven blog, you may be talking about refractory flue tile, which is a standard masonry item, and should be available at any brickyard.
My geodesic oven project:
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Old 10-01-2010, 10:18 AM
Tscarborough's Avatar
Il Pizzaiolo
Join Date: Oct 2009
Location: Ausitn
Posts: 3,292
Default Re: Chimney options

They still make and use clay pipe, glazed and unglazed, but neither is suitable for the chimney on a WFO. Just ask for "clay flue liner".
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