Do Impact Windows Really Work in a Hurricane?

Certified impact windows genuinely protect homes during hurricanes, and their performance has been demonstrated repeatedly in major Florida storms. Homes with properly installed impact windows routinely survive hurricanes with their building envelopes intact, while neighboring homes with unprotected windows suffer catastrophic damage. This is not marketing, it is the documented reality that reshaped Florida's building codes after Hurricane Andrew.

How Impact Windows Actually Work

Impact windows use laminated glass: two or more panes bonded to a tough interlayer of polyvinyl butyral or similar material. When struck by debris, the glass may crack, but it stays bonded to the interlayer and remains in the frame. This keeps your home sealed. The critical danger in a hurricane is not the broken glass itself but the sudden pressurization that occurs when the building envelope is breached, which can lift roofs and collapse walls. Impact windows prevent that breach.

The Testing They Must Pass

Certified impact windows undergo rigorous testing before earning Miami-Dade Notice of Acceptance or Florida Building Code approval. This includes large-missile impact testing, where a nine-pound two-by-four is fired at the window at approximately 34 miles per hour, followed by pressure cycling that simulates the sustained wind loads of a hurricane. Only products that keep the glass in the frame through both tests earn certification.

Real Protection, Real Savings

Because certified impact windows demonstrably reduce hurricane damage, insurers reward them with wind mitigation discounts of 10 to 45 percent, and the state offers up to $10,000 in grant funding to help install them. The protection is real, and so are the financial benefits. A free savings and eligibility report shows exactly how much you could save while protecting your home.

Frequently Asked Questions