Hurricane Prep: Reinforcing Your Garage Door for South Florida Storms

Your garage door is the largest opening in your house

It's also the weakest. Standard residential doors are rated for about 30 mph wind loads — Florida HVHZ zones require 150 mph or higher. If your door blows in during a hurricane, the pressure spike inside the house frequently lifts the roof off.

Three options, ranked

Replace with an HVHZ-rated impact door

The best long-term choice. Modern impact doors are rated 150 to 180 mph, come pre-reinforced, and qualify for wind-mitigation insurance discounts that often pay back the cost within five years.

Add a retrofit reinforcement kit

If your existing door is in good shape and only a few years old, vertical steel braces can be added to bring it up to roughly 130 mph. Cheaper than full replacement, but adds weight that requires re-balancing the springs.

Plywood as a last resort

Only consider this if a storm is imminent. Cut 5/8" plywood to fit each panel and anchor it on the inside with 3" deck screws into the frame studs — not into the door itself. This is a 60 mph upgrade at best.

What to inspect every June

• Track bolts — should be wrench-tight, no rust.
• Rollers — nylon rollers handle wind loads better than steel; replace if cracked.
• Hinges — heavy-duty hinges spread storm loads across the panel.
• Weatherstripping — gaps along the bottom seal funnel wind under the door.
• Wind code sticker — required on every door installed in Broward, Dade, and Palm Beach. If yours doesn't have one, the door is likely not rated.

Insurance and permits

A permitted, HVHZ-rated installation produces a Florida Wind Mitigation Form (OIR-B1-1802) that your insurer uses to apply discounts — often 20-40% off the wind portion of your premium. Without the permit, you don't get the discount. Always insist on a pulled permit.

FAQs

Will my old opener work with an impact door?

Usually yes, but impact doors are heavier — older 1/2 HP openers may struggle. We recommend upgrading to a 3/4 HP DC motor when the door is replaced.

How long does HVHZ installation take?

One day for a standard two-car door, including hauling away the old door and pulling the permit.

Are wood doors hurricane-rated?

Some custom wood doors can be HVHZ-rated, but they cost roughly 3-4x a comparable steel impact door and need more maintenance in Florida humidity.