Lifting and holding the roof
The wall is now high enough to be considered close to the ceiling. I want to have the cob walls do some of the load bearing of the roof system, and so I've come up with the idea of having wedges made of 4x4s jammed in now, when there's about a foot of space left. We'll then cob them right in.
In this photo, you can see that I'm using the farm jack to lift the rafter up about a quarter inch, and then I stick the wedge in, and lower the jack. Seems like a nice easy way to have the roof extra supported - even though it already supports itself.