[Cob] light clay

[dirtcheapbuilder-Charmaine Taylor]

at the CASBA  straw meeting last year a  commercial builder in Nevada 
City did a presentation on the 12" thick LSC walls he  handled for a 
couple.

He quited R25 for a 12" wall..the walls had larson trusses, and there 
was little thermal brisging as I recall.. but I still think R25  is 
high...

  my guestimate would be R20- R22 or so... if NOT too much clay is used.


view the  www.casba.org page and they may have more info there

>
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On Jun 21, 2005, at 6:06 PM, Amanda Peck wrote:

>
> more than single pane glass?
>
> quite a bit more if you put a couple of inches of styrofoam in the 
> middle--with a layer of wattle on each side?  (I'd guess highly 
> variable amounts of thermal mass--but almost certainly less than cob, 
> depending on how you did it.)
> ...................
>
> Ian wrote--he may deserve better than my answer, too:
>> Hi all,
>>
>> Does anyone know what the insulation values of light clay walls are?
>>
>> Thanks,
>> Ian Marcuse
>
>