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Minimum 4/12 pitch required.Cut out the off ridge opening in the roof sheathingas shown in Figure A. Size the opening inaccordance with the correct cutting data modelsand locate the opening 6" minimum off the peak ofthe roof as shown in Figure B. For single ventapplications, install vent as close to the center ofthe roof length as possible. Install multiple vents inevenly spaced areas of the entire roof length.Do not cut into trusses or rafters when cuttinghole in the roof.


Remove interfering shingle nails around theperimeter of the opening. Slide top and side flangesof the vent up and under shingles. Allow the bottomvent flanges to lay on top of shingles.


Care should be taken in keeping the vent properlyaligned. Nail in place using 1-1/4" coating roofingnails spaced approximately 6" - 12" on center and1-1/2" from each end. Roofing cement should beapplied to all shingle edges and nail heads toprevent water leakage. In severe weather coastalconstruction zones, caulking around entireperimeter, under vent flanges and near outer edgesis recommended.

Off Ridge Roof Vent Installation
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Florida Building Code 11100.4