John C Daley wrote:I help build these homes in Australia.
 I have always recommended creating the roof first, as stated it gives you shade, rain proofs the site and 
 the cob dries at about the same rate because a breeze is the best way to dry them.
 Scorching sun can cause faster drying that creates cracks etc.
 
 It is also a source of water if that is hard to get near the build site.
		
 
 Thanks for confirming my original thought. I haven't gotten to the stage of how to erect the roof yet, i'm still learning how to properly build the walls (plus plastering and painting/finishing). I have a lot to learn, especially how to install solar panels on the roof. But i'll get to it. Thanks for the advice, appreciate it!