Cob: Fw: Insulation

[Patricia L. MacKenzie]

>From: "Sarah Kopp" <kopp at kinneret.co.il>
>Reply-To: "Sarah Kopp" <kopp at kinneret.co.il>
>To: "Coblist" <coblist at deatech.com>
>Subject: Cob: Fw: Insulation
>Date: Sun, 27 Aug 2000 08:19:02 +0200
>
>
>-----Original Message-----
>From: Sarah Kopp <kopp at kinneret.co.il>
>To: Russel Johnsen <wpgweb at yahoo.com>
>Date: ë"å àá úù"ñ 08:18
>Subject: Re: Insulation
>
*********************Sarah wrote:
> >
> >Straw like cob wants to be protected from wetting and to have a very 
>vapor
> >permeable coating.  Even if you were to build a strawbale wall and a cob
> >wall inside that and outside of it - a straw sandwich, the moisture that
>the
> >cob would pick up inside and outside would transpire out those respective
> >surfaces before it would move through the straw, because although
> >evaporation will occur toward the warmer surface experience with earth
> >plastered straw walls indicates that the earth holds moisture better than
> >straw, preventing wicking of moisture into the straw until the sun dries 
>it
> >out again.  This is dependent on the thickness of the plaster, 
>too............
> >Sarah
> >Tsfat, Israel
> >*********************

To all,
What Sarah has suggested about a sandwich of cob sounds to me like some of 
the brick I had been reading about - the two layers with a filling between - 
and that it sounds as if the moisture itself from condensation would be kept 
away from the interior walls, solving the moisture, mildew problem I just 
wrote about.....
However, given time constraints, it sounds as if it would be possible only 
if the actual time existed to double construct.
P.
ruanmackenzie at hotmail.com

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