This will depend on the size of your overhang.
How to frame a roof overhang.
To do this first make sure you cut your ridge board to a length that includes the length of the shed s rakes.
Attach both sides of your over hang to posts angle posts into the house.
Get up on your roof or scaffolding.
Apply a two by six wood ledger to the exterior of the home above the door right under the roof.
Slide the flashing in and line it up so that the bent angle runs parallel to the overhang.
If you are making a smaller overhang you may be able to skip the posts and use two by four.
Next cut two additional sets of rafters for each gable end.
Or less you might try a technique that bob syvanen wrote about in dummy rafter tails way back in 1985.
Attach small wooden block to the house studs and fasten your posts to the block with nails.
Slide your first sheet of flashing under the first layer of shingles.
Step 7 paint your frame optional.
This article focuses on framing.
Again have the helper hold the rafter extension in place and gauge the distance of the overhang while you hold the extension against the rafter and the roof sheathing and nail it to the existing rafter with a framing nailer.
To create an overhang on the gable ends of your shed you ll need to construct something called a gable ladder.
Take the longer flat side of the flashing and gently slide it in between the first row of shingles and the roof.
If narrow overhangs are all you need say 8 in.
Attach six metal.