Remove the broken shingle.
How to patch a shed roof.
Patching shed roof felt 1.
Lay the entire first row one at a time nailing each down with one inch roofing nails.
You ve got to get the old nails out that held the damaged shingle in place.
The shed prior to repair looked in a pretty sorry state the acrow prop holding up the roof is a bit over the top but definitely needed with repair of the roof rather than replacing the whole shed as duncans preferred option the first step was to determine the extent of the damage.
When you reach the other end of the roof trim any excess off the last shingle with a utility knife.
Cut away a square or rectangle of the felt directly around the damaged area so that you have nice.
A shingle ripper is a marvelous tool.
Use a hammer and chisel or flat head screwdriver to break up the shingle.