[Cob] light clay

[Amanda Peck]

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