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Impact Windows and Hurricane Season: What South Florida Homeowners Should Know

Impact glass is both a building-code requirement and a practical choice in Miami-Dade and Broward. Here is what it does, what homeowners without it can do, and how it fits the seasonal routine.

By Nanci Gilbert, PA September 28, 2026
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Hurricane season in South Florida runs from June through November, and the most expensive damage after a storm often starts with a broken window. When wind gets inside a home, it pressurizes the structure and can push a roof off its walls. That is why impact glass exists: to keep the envelope of the home sealed when debris is flying.

A code requirement in Miami-Dade and Broward

Since the building-code reforms that followed Hurricane Andrew, new construction and major renovations in Miami-Dade and Broward have been required to use impact-resistant windows or approved permanent shutters on every exterior opening. The two counties are Florida's High-Velocity Hurricane Zone, and the code is specific about what a window must survive: large-missile impact, tested and certified, with a Miami-Dade notice of acceptance. For homeowners with an older house, the requirement explains the upgrade you keep hearing about from contractors.

What impact glass actually does

The benefit starts with debris: laminated glass holds together when something hits it, so the wind stays outside. That keeps water out too, because wind-driven rain has no way in through broken panes. Impact glass also makes the home quieter, blocks a meaningful share of UV rays, and runs a little cooler at the edges, all of which matter in a climate where sun and noise are constant.

If your home does not have it yet

Not every South Florida home was built after the code changed, and impact glass is an investment with its own timeline. Until it is installed, permanent shutters or code-approved panels close the same gap. The practical checklist each season: test every window and door seal, confirm shutters and panels are accounted for and stored where you can reach them, and photograph the interior before a storm so claims are easier to file. After the season, inspect the seals and frames for wear.

The seasonal rhythm

Impact glass does not end hurricane preparation. It removes the weakest link in it. The storms still get decisions made in advance: supplies, documents, an insurance policy review, and a plan for the family. Homeowners who treat the windows as part of a prepared home walk into the season with fewer worries, which is exactly what the calm weeks before a storm are for.

A conversation worth having before the season peaks

If impact windows are on the list for your home, the useful questions are about timing and value: could the home qualify for a wind mitigation discount, does the upgrade matter if you plan to sell in the next few years, and what does the current window setup actually protect? Those answers come from a licensed contractor and an agent who has walked through the condition of hundreds of South Florida homes.

Nanci Gilbert, PA is a South Florida realtor who guides growing families, sellers, and buyers across Miami-Dade and Broward. Questions about this topic? She answers every message within one business day.