This structure supports all roof sheathing materials such as plywood sheathing underlayment and of course shingles.
Roof return framing.
Run both boards long and cut in place.
The run or half the building span is the base of the triangle.
The rise or height of the roof at its peak is the altitude of the triangle.
Finish the eaves framing after ripping the top of the subfascia with a circular saw set to 26 5 degrees i flushed the top ripped edge with the top of the plumb cut on the rafters and screwed the subfascia to the rafter tails.
And the line length measurement from the roof peak to the building wall is the hypotenuse.
Rafters start at the top of the roof and go down to the eaves but not exceeding the exterior walls of the house.
Notches under the rafters allow the ledger stock to be full dimension on the ends to better support the return framing.