Flat Roofs
Problem:
Because no gravel stop was installed,
the asphalt flood coat and the roofing gravel are migrating down the face of the shingle roof.
Solution:
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.
Problem:
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.
Solution:
Don’t forget to fasten the flashing
to the sheathing or nailer with nails or screws.