Cob Chimney?

[Chuck Learned]

I have the same interest as Mike in building an exposed Chimney. Mike I am
currious why you
have two flue's. I know nothing but it would seem that with all that good
air circulation and linseed
oil that the chimney would ok. I look forward to this reply. Also I am
wondering how high above
the roof the chimney needs to be?

----------
> From: Mike Carter <cobcrew at sprynet.com>
> To: coblist at deatech.com
> Subject: Cob Chimney?
> Date: Sunday, April 26, 1998 2:24 PM
> 
> Has anyone out there built a Cob chimney (above roofline)?
> 
> Our flue is made out of Cob (no straw, high sand mix liner) and is built
> into the wall.  BUT, we need to extend a chimney up above the roof level.
> This means that there will be no "hat" to speak of over the Cob on the
> chimney if we use Cob for the chimney wall (in addition to the flue
liner).
> 
> 1)  Should we do the exposed (7' or so) part of the chimney with Cob or
use
> something else, like brick?
> 
> 2)  If we use Cob, can we use a water-resistant coating (like stucco)
since
> the Cob can breath from the inside of the flue pipes (there are 2 of
these,
> 8" in diameter).  Or should we just use a very thick plaster and plan of
> maintaining the chimney every couple of years?
> 
> Mike Carter
> cobcrew at sprynet.com
> Austin, TX    USA
>