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Every Nail Counts in a Hurricane
The difference between a roof that stays and one that flies away is often just nail spacing. See exactly where nails go and why ring-shank nails are required in the Keys.
Monroe County Schedule
More Nails at the Edges, Fewer in the Middle
If you have ever watched a piece of paper lift in the wind, you noticed it always starts at the edges and corners. Roofs work the same way. The wind creates the strongest suction at roof edges and corners (Zones 2 and 3), while the middle of the roof (Zone 1) sees much less pressure.
Smart engineers figured this out long ago, so building codes require more nails at the edges where the pulling is strongest. A typical 4x8 sheet of roof sheathing in Monroe County might have nails every 4 inches along the edges but only every 6 inches in the middle where it crosses the intermediate rafters.
Why Ring-Shank Nails Are Mandatory
During a hurricane, wind does not just push and pull once - it pumps the roof sheathing up and down thousands of times. Smooth nails work loose with each pump. Ring-shank nails have ridges that grip the wood fibers like tiny barbs, holding tight even after hours of pounding. In high-wind zones like the Keys, smooth-shank nails are simply not allowed.
The numbers matter: a properly nailed roof panel in Monroe County might have 60+ nails holding it down. That same panel with nails at 6 inches everywhere would only have about 40 nails. Those extra 20 nails at the edges could be the difference between your roof staying on or ending up in your neighbor's yard.
Inspectors check nail spacing carefully during construction. They use a simple grid pattern to count nails and measure spacing. If your nailing pattern does not match the approved plans, you will be re-nailing before you get your inspection passed.
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Complete nailing specifications for each roof zone - sized for Monroe County wind pressures
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