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Kiko Denzer on Art

[Cob] Paper? Won't solve shrinkage problem!!!

Ocean Liff-Anderson ocean at
Fri Mar 14 03:28:22 CDT 2008

sorry joe r dupont, but paper-crete also depends on adequate sand-to- 
clay ratio, just as cob adding paper won't solve the  
original poster's problem with a fissure above the oven door!!!

only adequate sand-to-clay ratio will solve the problem!

anyone disagree?  then post your rebuttal and let's hash this out!

ahimsa sanctuary
fireworks restaurant

On Mar 12, 2008, at 4:32 PM, joe r dupont wrote:

> mix in some paper!!! paper pulp will help dry the unit.
> On Wed, 12 Mar 2008 13:48:36 -0700 Ocean Liff-Anderson
> <ocean at> writes:
>> The main reason I can see such a fissure appearing is the lack of
>> adequate sand, and hence excess shrinkage as the cob dries.  You
>> might need to pull down all the cob, incorporate more sand into the
>> mix and rebuild the oven!
>> Sorry!
>> Ocean
>> On Mar 12, 2008, at 11:17 AM, Muddy Toenails wrote:
>>> Hi to everyone on the list-
>>> i'm struggling quite a bit with this oven that i'm building...
>>> Since we started laying the cob, two large sections of the oven
>>> have fallen.
>>> we have fixed and rebuilt those two sections (luckily, we were
>>> still in the
>>> building stage so the cob didn't dry too much between the old and
>>> the new
>>> cob), but a new problem has arisen;
>>> a long, deep fissure has appeared over the oven mouth. There is
>>> maybe a
>>> foot's worth of material that looks like it is in danger of
>> falling.
>>> We have not yet pulled out the sand from inside the oven. i'm
>>> wondering what
>>> i can do to prevent this section from falling away from the oven!
>>> Thanks in advance for your advice,
>>> h.
>>> _______________________________________________
>>> Coblist mailing list
>>> Coblist at
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