Remove interfering shingle nails around the perimeter of
the opening. Slide top and side flanges of the vent up and under
shingles. Allow the bottom vent flanges to lay on top of shingles.
Care should be taken in keeping the vent properly aligned.
Nail in place using 1-1/4" coating roofing nails spaced approximately 6" -
12" on center and1-1/2" from each end. Roofing cement should be applied
to all shingle edges and nail heads to prevent water leakage. In severe
weather coastal construction zones, caulking around entire perimeter,
under vent flanges and near outer edges is recommended.
Off Ridge Roof Vent Installation
Florida Building Code 11100.4