[Cob] Cob on a reciprocal roof

[Jill Hogan]

Hi Matt I built my roof of cob and lime rendered it.I live in the Karoo 
a semi desert arid area in South Africa and the huge variance of temp 
from night and day and summer and winter there is expansion and 
contraction so we get cracking. We take our lime render water it down 
with prickly pear juice and then use it as a paint once a year before 
the rains and it seems to be working. This year we have had unsual 
amounts of rain and we have had to do it more regularly, but am still 
testing you can see pics of the roof on www.mat.org.za
Regards Jill


On 2011/07/01 01:30 AM, Matthew Caswell wrote:
> Hi,
>
>          I'm building a cob house in the structure of a honeycomb
> (hexagonal rooms) and for each room I was planning on having
> individual roofs.  These roofs would be reciprocal, for the strength
> (and ease of construction).  However, I do not plan on having
> electricity in my home and am instead hoping to use cob oven(s),
> torches, and the sun for light (reciprocal roofs have holes in the
> middle so that would be my smoke hole).  I would be more comfortable
> slapping cob on the roof frame (instead of wood) to help counter
> possible roof burning scenarios.  Could cob stay on the roof while
> drying, and would it survive the rain (I live in a rainy climate and
> would probably have to attach wooden shingles)?
>
> Thanks,
>    Matt
>


-- 
*Jill Hogan*
McGregor Alternative Technology Centre "MAT"
PO Box 365
McGregor
6708

www.mat.org.za <http://www.mat.org.za>
Phone: 023 625 1533

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