[Cob] Metal and Cob

[Kata Polano]

We are currently building a cob shop framed entirely with metal. We are
using reclaimed water pipes, rebar, and galvanized fencing. We have been
asking the same questions and getting different answers as well. Being that
fire is the main concern where this building is, we decided to go for it. We
will update the results after a year, or less if we see results. I would
think that the wetter the climate, the more risk of rusting out.

What are you thinking of using the metal for anyway??
Kata
Keep it Beautiful


On Sun, Mar 14, 2010 at 3:12 AM, Shannon Dealy <dealy at deatech.com> wrote:

> On Sun, 14 Mar 2010, David Anderson wrote:
>
>  I was wondering if we could get a consensus on metal objects in cob.  I
>> think this has been talked about here in the past so, in that case, someone
>> could just summarize what was said.  In my mind I have conflicting ideas
>> that I have read in different places saying both that metal will rust out in
>> cob and others saying that it will be fine as the cob will keep it dry.
>>
>
> Hi David,
>
> I doubt there is a single right answer, probably depends on your soil. One
> case that I am aware of had metal embedded in a connection and it completely
> corroded away in less than a year.  My recollection (which is rather fuzzy)
> is that they were nails of some sort, and that it turned out the soil used
> in the wall was somewhat acidic.
>
> FWIW.
>
> Shannon C. Dealy      |               DeaTech Research Inc.
> dealy at deatech.com     |          - Custom Software Development -
> Phone: (800) 467-5820 |          - Natural Building Instruction -
>   or: (541) 929-4089 |                  www.deatech.com
>
>
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