Cob: Cob insulation idea

[lightearth at onebox.com]

Yea, Darel, you're right we put the insulation between the walls...what was 'plastered over' was the ends of the scrap wood on both the inside and out and the cob mortar in between....it's led to the most handy attachment spots for screws if hanging cabinets etc. as the 24 inch wood piece's ends are just below the surface!


-----Original Message-----
From:     Darel Henman <henman at it.to-be.co.jp>
Sent:     Mon, 16 Dec 2002 16:16:10 +0900
To:       lightearth at onebox.com
Cc:       jwalker at magma.ca; tms at northcoast.com; coblist at deatech.com
Subject:  Cob: Cob insulation idea



lightearth at onebox.com wrote:
> 
> Hey Jen,
> 
> ....,,24 inches of dry wood doesn't present much of a thermal break.

It presents a thermal break of R-val 30.92 for white pine to 31.44 for
spruce or yellow pine.  What does your clay panel R-value per inch?


> We plaster over the whole thing
I though you were putting it between walls.

.. ending up with about a 24 inch wall with thermal mass, insulation (R
value?) and a durable/load bearing wall...
> 
The mass is already there in the cob, it has its own R-value as well.  
Which might not be necessary depending on the area.   For areas with
long cold spells and little sunlight energy this would be good. Earth
does not conduct heat quickly, but it can store and sink a lot.

> Marlin
> --

Darel