[Cob] roof suggestions wanted

[Damon Howell]

"Anyone have an idea what I can use (for waterproofing my flat roof)? "

Carrie,
	You could just do like they used to with flat roofs; lay down felt  
then put tar and gravel over it.  Tar and gravel weigh a lot though  
and you'd have to build adequate support underneath. But a sturdy  
power pole in the middle should do the trick.

Damon in GA