Because no gravel stop was
installed, the asphalt flood coat and the roofing
gravel are migrating down the face of the shingle roof.
Install a 3/4-inch-high sheet-metal
gravel stop, with a flange at least 4 inches wide,
under the edge of the built-up roofing. The stop should also
include a bottom flange, extending at least 4 inches over the
top course of asphalt shingles.
Edge flashing was not
nailed. The installer forgot to attach the edge
flashing to the roof before the built-up roofing was installed.
When the roofing material later contracted, it pulled the
entire flashing away from the edge of the roof.
Don't forget to fasten the
to the sheathing or nailer with nails or