Use a putty knife to force the filler inside the hole making sure to fill in.
How to fix woodpecker hole in siding.
Sand the filler.
Insert the shim edgewise into the hole.
Repeat this step if the glue did not hold.
Scoop out a golf ball size glob.
Use the nail to pull it flush against the interior of the siding.
To hold the shim in place for drying hang the hammer from the nail by its claw so that the weight of the hammer is gently pulling the shim tight against the hole.
Chisel out the back interior of the holes.
Fill the siding holes with wood filler.
Smear a generous layer of the epoxy putty over the holes.
Repairing small woodpecker holes 1.
Allow at least 1 hour of drying time.
Mix up a batch of lightweight structural adhesive epoxy putty on a scrap board.