Hello all, hopefully i can explain this so that it makes sense. I will hopefully be building a cob house next spring, and will most likely have a tin roof with roundwood logs for the framing members (8 in. or so). The shape of the house will be circular, so I was wanting to make the roof circular as well to match the shape of the house, with a good overhang. I have been going over a couple ideas and would like to get some second opinions. The roof style will just be a simple sloped shed roof, not too steep of a pitch (something like the picture below). The span from wall to wall would be about 12 ft., plus overhang all around.
This shows just the basic slope of the roof.
With this option, the blue lines represent logs laid underneath the (black) logs for support that way
This would just be running the logs without extra support, then tying in perpendicular on opposing sides.