[Cob] spiral roofs

[Amanda Peck]

I have no clues how to receive instruction in building reciprocal roofs, if 
that is what you want.  I expect that there is some somewhere.  Tony 
Wrench's book gives pretty serious details of how HE went about it.  But the 
man I had working on my barn last year would have had kittens had he been 
asked to use Tony Wrench's advice about anything because Wrench never says 
WHAT TO DO and he ASSUMES that mistakes can be made and corrected somewhere 
along the line.

I think I'd be fairly comfortable using Wrench's advice, even though I know 
I'd be on my own on size of poles and strength required--no deniability on 
my part if it failed.  There seem to be a lot of pictures around of 
reciprocal roofs, though.

I've seen pictures of small models (a foot or so across) made out of 
smallish sticks and people jumping on them, amazed that they are so strong.  
Come to think of it, that was in pictures from some workshop or other.
......................
Aaron wrote:

I love the pictures of "spiral" round wood roofs from
owlswamp.com.  a friend once suggested such a roof for
cob structures but could offer no real advise or
direction.  please tell me where someone might learn
about these roof designs.