Cob:

[Amanda Peck]

In the Nashville area there is a round straw-bale chapel.  It has a round 
grain bin roof.  It was insulated, as I recall, by putting bags of straw 
above the ceiling, and it did have a ceiling.

Higher tech than that, and sprayable, is Icynene.  It's supposed to be 
pretty green.
http://www.icynene.com/index.asp

I used to know where there was a picture of the chapel on-line. Someone said 
it looked remarkably like a squat mushroom.  Cute, and nice inside.  
Unfortunately a) the ISP went out of business and b) the owner of the web 
site is currently completely off line.



Terry mentions (snipped)

my wife and i are going to use a metal grain ben roof, they go up to 40 feet 
around.  But our cabin is circular. I read about this on another web site 
where they were trying to build sustainable inexpensive housing for a Native 
American group in Canada. We are not sure how we are going to insulate 
though.  The sandwich board sounds good but what about the outgasing from 
the foam and the OSB.  Terry


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