The level line has been attached to the top peak of the new roof joists.
Then, we added another level line at the point on the joists where the slope ends.
View of the area where the new wall is being built.
I then used a circular saw set to the exact depth of the siding to cut out a section where the new front Breezeway wall stud will connect to the sheathing of the Main House wall. I think this will give it a more stable and weather-proof connection.