With roofing you again have a couple of choices.
How to extend or add a roof overhang to building.
This is a super simple project and requires just a f.
Attach the facia board and install the same size roof sheeting mine was 1 inch boards and the drip edge.
First nail the subfascia and fascia to the rafter tails next match the thickness of the existing roof sheathing as best as you can within 1 8 in.
Cut rafter tail extensions three times the length of the overhang that you want to add using lumber the same size as the existing rafters.
New sheeting on extention.
You do not need more than 2 feet 0 61 m of total overhang for your building to stay safe and avoid water damage.
4 choose to extend the preexisting rafters to add 2 9 inches 5 1 22 9 cm.
If you only have 1 2 inches 2 5 5 1 cm of overhang you likely need to go with this option.
You will need to buy some new drip edge because the sides of the overhang are longer than the ole drip edge and will require extensions.
Position the rafter extensions against the existing.