Jacksonville, FL Hurricane Preparedness: Roof Standards (2026)

The Florida Building Code (8th Edition, 2023) establishes rigorous roof standards for hurricane resistance in Jacksonville. Roof covering materials must pass wind resistance testing under ASTM D3161 Class F (for asphalt shingles) or TAS 107 (Test Application Standard for roof coverings). All roof-to-wall connections must use approved hurricane straps or clips (Simpson Strong-Tie H2.5A or equivalent) rather than simple toenailing, which is prohibited in high-wind zones. Roof decking (typically plywood or OSB) must be attached using an enhanced nailing schedule (8d ring-shank nails at 6 inches on-center at edges and 6 inches in the field for roof sheathing in the wind-borne debris region). Underlayment must be peel-and-stick (self-adhering polymer modified bitumen) for the first course from the eave, with approved synthetic underlayment for the remainder. When re-roofing, if more than 25% of the roof covering is replaced within a 12-month period, the entire roof must be brought into compliance with current Florida Building Code wind resistance standards. Secondary water resistance (SWR) is required under roof coverings. Jacksonville's 130 mph design wind speed requires Enhanced protection level.