[Cob] why? cob stoves & light straw

[Charmaine Taylor]

Ok Now I am confused..why does a mass heat oven need light insulation?? I was
stuck thinking about addition of the wood ash, which is used for metal and
large drum rocket stoves...to keep the heat to the food, not the metal...

BUT a cob oven cooks by slow  heat radiating to the food inside.... right? so
a thin cob wall would not hold heat as  long, and I don't see a reason to mess
with a basic horno design..did I miss an email somewhere??


Ms. Charmaine  Taylor/ Taylor Publishing
http://www.dirtcheapbuilder.com
http://www.papercrete.com



Kyle Towers wrote:

>  I think the R value of such a
> > wall is as complicated to figure as that of a log wall.  That is, the
> system
> > seems to function much better than simply adding the elements would
> produce.
>
>     There is no reason to think that there are insulation factors for which
> there is no accounting.  That is, there are no additional air gaps or such
> created when applying the plasters.  The synergistic effect you experienced
> was most likely the result of the higher thermal mass inside the envelope,
> which dampens temperature swings.
>
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