Slide the split ends of the hammer under and around the nail.
Flush house roof.
Attach the horizontal beam by using a nail gun.
Although roof flashing is occasionally fabricated from plastic roofing felt or rubber it is usually made of rust resistant metal galvanized steel aluminum or copper.
Attach a sill plate to the house between the two side supports of the porch.
Galvanized sheet metal is most common but aluminum and copper find occasional use in specialty situations.
Refrain from pulling out the structural nails that are not flush to the surface.
In sum single piece roof wall flashing is a bad idea in the hands of typical residential roofers and re roofers and this approach has been found by home inspectors to be unreliable in practice.
Step 4 position the rafters on top of the sill plate.
After that to make it flush with the roof of the existing house cut the two outer rafters.
Use the split end of a claw hammer to pry out nails still holding bits of shingles onto the roof.
Roof flashing is a thin material usually galvanized steel that professional roofers use to direct water away from critical areas of the roof wherever the roof plane meets a vertical surface like a wall or a dormer.
You have to do it thoroughly so that the rafters sit flush on it.
The sill plate or piece of wood that secures the supports to the roof should sit flush to the top edges of the roof support columns.
This article is an addendum to flashing roof wall details live link just below.