Impact-resistant windows use laminated glass — two or more layers of tempered or heat-strengthened glass bonded to an interlayer of polyvinyl butyral (PVB) or ethylene-vinyl acetate (EVA). When struck, the glass cracks but the interlayer holds the broken pieces in place, maintaining the weather seal and preventing debris penetration. The frames are also reinforced and engineered to resist higher structural loads.
No window is truly "hurricane-proof." The correct term is impact-resistant or hurricane-rated. They're designed to withstand flying debris and sustained wind pressure without breaching the building envelope — a critical distinction, because once a home is breached, internal pressure can cause catastrophic roof failure.
| Window Type | Installed Cost (per sq ft) | Installed Cost (per window, avg) |
|---|---|---|
| Standard double-pane | $25–$50/sq ft | $300–$800 |
| Impact-resistant (basic) | $55–$80/sq ft | $700–$1,500 |
| Impact-resistant (premium) | $80–$115/sq ft | $1,200–$3,000+ |
For a 2,000 sq ft home with 15–20 windows, a full impact-resistant window installation typically runs $15,000 to $45,000 depending on window count, size, and product tier. Premium brands like PGT, CGI, and Andersen 400 Series Impact sit at the higher end.
PGT Innovations and CGI Windows are the dominant Florida-based manufacturers with the broadest distribution in coastal markets. Andersen's 400 Series Impact and 200 Series offer impact options with broader national availability. WinGuard by PGT and SierraTM by CGI are frequently specified products in high-wind zones. For whole-house projects, work with a contractor who is a certified dealer for your chosen brand — warranty coverage often depends on it.
Design Pressure (DP) rating measures a window's structural resistance to wind load. DP50 means the window is rated for 50 pounds per square foot of pressure — sufficient for winds around 130 mph. Most Florida building codes require DP50 or higher in coastal areas. The Impact rating (shown as "DP50+") confirms the window has passed both structural load and impact debris testing per ASTM E1886/E1996 standards.
Florida's building code requires impact-resistant protection (windows or storm shutters) for openings in wind-borne debris regions, which cover most — though not all — of the state. Confirm what applies at your address with your county building department. The HVHZ designation in Miami-Dade and Broward counties has the most stringent requirements. Texas Gulf Coast counties, coastal North and South Carolina, Louisiana coastal parishes, and Hawaii also have wind-borne debris region requirements. Always check your local building department — requirements are updated after major storm events.
In eligible coastal zones, yes — typically 10 to 20 percent reduction on the wind/hurricane portion of your premium. Florida homeowners with full impact-resistant openings (all windows and doors) receive the maximum wind mitigation discount on their Citizens or private windstorm policy. The savings compound over time and contribute meaningfully to the ROI calculation for the upgrade cost.
Window film applied to standard glass is not equivalent to impact-resistant glass and is not accepted as a code substitute in wind-borne debris regions. Film can help hold broken glass together and slow penetration, but it does not meet the structural and impact resistance standards of true laminated glass. It's a low-cost improvement for non-code areas, not a code-compliant replacement in hurricane zones.
If you're in a High Velocity Hurricane Zone, don't take a contractor's word that a window qualifies. Verify the Miami-Dade NOA approval yourself before it's installed; that paperwork is what actually protects you and your insurance discount.
These are the questions homeowners ask most often before starting this project - what it costs, how long it takes, what a fair quote looks like and which details change the price. Each answer below is written to stand on its own, so you can read just the one you need.
