Roofing Nails vs. Screws: Florida Wind Code Explained

When a hurricane or tropical storm tears through New Smyrna Beach, the fasteners holding your roof together are often the difference between minor repairs and a total loss. Most homeowners never think twice about whether their roofer used nails or screws — but Florida's building code does, and so should you.

Understanding the fastener rules isn't just an academic exercise. With Florida's notoriously tight insurance market, carriers are increasingly scrutinizing how a roof was installed, not just how old it is. Getting the details right during installation can affect your claim outcome, your premium, and your peace of mind for the next 20 years.

Why Fasteners Matter So Much in Florida

Florida sits in one of the most demanding wind-load environments in the world. The Florida Building Code (FBC) is updated on a roughly three-year cycle and sets specific requirements for how roofing materials must be attached based on your local wind speed design zone. In coastal areas and South Florida, design wind speeds can reach 160–180 mph or higher. Inland areas of Florida typically fall in lower zones, but "lower" still means 110–130 mph in many counties.

The core question the code is trying to answer: how much upward pull (uplift force) can a fastener resist before it lets go? Wind doesn't just push sideways on a house — it creates negative pressure (suction) on the roof surface that tries to peel it apart from the top down.

Ring-Shank Nails: The Florida Standard for Shingles

For asphalt shingle roofs — by far the most common material in New Smyrna Beach — the Florida Building Code generally requires ring-shank nails (also called annular-ring or deformed-shank nails) rather than smooth-shank nails. Here's why that distinction matters:

• Smooth-shank nails pull out of wood decking relatively easily under uplift. Think of pulling a regular wire brad out of a board — it slides.
• Ring-shank nails have ridges machined around the shank. Those rings lock into wood fibers as the nail is driven, and pulling the nail back out can require two to three times the force of a smooth-shank equivalent.

The FBC, along with the manufacturer's installation requirements (which are legally binding in Florida because manufacturer specs are incorporated by reference), typically calls for ring-shank nails of a specific diameter — commonly 11- or 12-gauge, 1¼ to 1½ inches long for standard three-tab and architectural shingles on 7/16-inch or ½-inch OSB decking. Your contractor must also meet the shingle manufacturer's minimum nail count per strip, which is often six nails per shingle in high-wind zones, rather than the four nails that suffice in lower-wind areas.

Nail depth matters too. A pneumatic nail gun set at the wrong pressure can over-drive or under-drive nails. An over-driven nail breaks through the shingle mat and loses holding power. An under-driven nail leaves a protruding head that can cause cracking. A licensed inspector can check nail depth and pattern on a sample of removed shingles during a tear-off.

Where Screws Come Into Play

Screws are not the standard fastener for asphalt shingles, but they are the code-required or preferred fastener for several other common Florida roofing systems:

Metal Roofing Panels

Standing-seam and exposed-fastener metal roofs rely on self-tapping screws with neoprene or EPDM washers. The screw's threaded shank provides dramatically higher pull-out resistance than any nail in the same substrate. For 5V-crimp or corrugated metal panels — common on agricultural and older Florida homes — the screw spacing pattern across the field and at the perimeter and corners is tightly regulated because corners and eaves experience the highest uplift forces.

Tile Roofing

Concrete and clay tile in Florida are almost always secured with a combination of adhesive foam and tile screws or hurricane clips, depending on the tile profile and the local wind zone. Florida's Product Approval system (found on the state's Building Product Approval database) lists exactly which fastener type, size, and pattern each tile product is approved for in each wind zone. A tile job done with the wrong screw length into aging, delaminated decking is a serious liability.

Roof Decking Itself

Before any finish material goes on, the decking (OSB or plywood) must be fastened to the trusses or rafters. Post-Hurricane Andrew reforms led Florida to require ring-shank nails or screws at 6-inch spacing in the field and 4-inch spacing at the perimeter and edges for most wind zones. This is why a "nail pattern inspection" is now a standard milestone inspection during re-roofing — a building inspector physically checks the nail pattern before underlayment is applied.

Nails vs. Screws: A Side-by-Side Summary

• Pull-out resistance: Screws are generally superior; ring-shank nails are the minimum code-compliant option for shingles.
• Installation speed: Nails are faster; screws take more time and labor cost.
• Removability: Screws can be backed out without damaging surrounding material — useful for repairs.
• Corrosion requirement: Both must be hot-dipped galvanized, stainless steel, or aluminum in coastal Florida environments. Electro-galvanized (bright) fasteners corrode quickly in salt air and are not code-compliant for roofing in most Florida coastal counties.
• Code documentation: Your contractor should provide the Notice of Commencement and permit paperwork showing which fastener system was approved for your specific project.

What to Verify With Your Contractor

Before signing a roofing contract in New Smyrna Beach, ask your contractor these questions:

• What gauge and shank type of nail will you use on the decking and on the shingles?
• What nail spacing pattern will you use at the perimeter versus the field?
• Is this project being permitted, and will it receive a nail pattern inspection?
• Which Florida Product Approval number covers the fastener-and-material combination you're installing?
• Are all fasteners hot-dipped galvanized or stainless steel?

A reputable, licensed contractor should be able to answer every one of these questions without hesitation. If they can't — or wave them off as unnecessary details — that's a red flag worth taking seriously.

You can also read more guides on what to look for before, during, and after a roofing job, or learn about your options for a roof replacement and storm damage claims.

Get Connected With a Licensed New Smyrna Beach Roofer

Fastener choices sound like a small detail, but in a Florida wind event, they're the difference between your roof staying put and your attic becoming the sky. The roofers New Smyrna Roof Co works with understand the Florida Building Code, pull the proper permits, and use fastener systems approved for your specific wind zone.

Call us today and New Smyrna Roof Co will connect you with a licensed local roofer for a free inspection — so you know exactly what's holding your roof together before the next storm season arrives.