One of the most important steps you can take in preparing for a windstorm is to make sure that your "building envelope" is sealed. That means tightly covering all windows and doors to prevent wind from entering. If you can keep the wind outside, you and your possessions will be safer inside.
Garage doors are one of the most vulnerable areas to hurricane force winds for two reasons: the relatively long span of opening that they cover and the weak materials they are built with. Many garage doors are constructed of lightweight materials to conserve weight and expense. Although their lighter weight makes them easier to raise and lower, it often makes them less resistant to the wind and impact forces of a hurricane.
You can reinforce a garage door by adding girts (usually wooden boards) across the back of the door and by strengthening the glider wheel tracks. If your existing door is old or damaged, you might want to replace it with a stronger door and tracks. Even if you decide to buy a new door, reinforcing it is still a good idea. Hardware and home supply stores, as well as companies that specialize in overhead door sales and installation, can advise you about stronger doors and track systems.
Keep these points in mind when you reinforce or replace your garage doors:
Benefits of Using This Mitigation Strategy
If you hire a contractor to reinforce an existing two-car garage door, you can expect to pay about $300. The cost of replacing a door, including installation, can vary greatly depending on the size and type of door.
Technical Information Provided by FEMA