Impact windows are usually purchased in Florida for storm protection, but homeowners often ask a second question: do impact windows also make a home harder to break into?
They can add a more resistant glazed barrier than ordinary annealed glass, especially because impact systems commonly use laminated glass that is designed to remain bonded to an interlayer after the glass cracks. But that does not make an impact window burglar-proof, and hurricane-impact approval should not be presented as a separate forced-entry or security certification.
The most accurate way to think about security is as a complete system: glass, sash, frame, locks, anchors, adjacent doors, and the rest of the home’s security measures.
Why laminated impact glass behaves differently
A typical impact-rated glazing system uses laminated glass: two or more layers of glass bonded to an interlayer.
When a severe impact cracks the glass, the interlayer is intended to help hold fractured glass together instead of allowing the opening to immediately fall away. That behavior is important in hurricane testing because maintaining the building envelope after windborne-debris impact is part of the protection strategy.
Florida law also requires products marketed as hurricane, windstorm, or windborne-debris impact protection to use an approved product path. The approval belongs to the tested system and configuration, not to a generic statement that any laminated glass is “impact glass.”
For a homeowner, that means the security benefit starts with verifying that the actual window system is approved, not simply asking whether the glass contains laminate.
Read our guide to Florida Product Approval if you want to understand what the approval number represents.
Does laminated glass stop a burglar?
It can make glass penetration more difficult, but there is no honest universal promise that an impact window will stop every forced-entry attempt.
A determined intruder can attack more than the center of the glass. Real-world security can be affected by:
- Lock quality and engagement
- Sash or panel condition
- Frame strength
- Installation and anchorage
- Accessible hinges or hardware
- Adjacent doors
- Garage openings
- Tools, time, noise, and repeated impacts
A cracked laminated lite may remain together longer than ordinary glass, which can delay creation of an open hole. Delay can be useful in a layered security strategy, but delay is not the same as guaranteed prevention.
If a proposal uses terms such as “burglar proof,” ask what separate forced-entry test or certification supports that claim for the exact product.
Is hurricane-impact testing the same as forced-entry testing?
No.
Miami-Dade and Florida product-approval processes evaluate building-envelope products for code-related performance, including impact and wind-pressure requirements when applicable. Those are not the same thing as a dedicated burglary-resistance test.
A product can legitimately be hurricane-impact approved without carrying a separate security rating.
That distinction matters because homeowners should not take one certification and stretch it into a claim it was never designed to prove.
What role do locks play?
A strong glass package does not compensate for a poorly functioning lock.
For operable impact windows, make sure the unit:
- Closes fully
- Latches normally
- Uses the correct manufacturer hardware
- Has no loose or damaged keepers
- Has no sash movement that prevents proper engagement
For sliding glass doors, locks, interlocks, rollers, panel alignment, and the meeting stiles are especially important because the opening is large and frequently used. See our impact sliding glass door buyer guide for those details.
Do not drill into an approved frame or install unrelated aftermarket locks without first confirming the product manufacturer’s guidance.
Can security film turn a regular window into an impact window?
No generic film application should be represented as converting an ordinary window into a Florida-approved impact window.
Impact approval applies to a tested and approved assembly. Adding film to a non-impact window does not automatically reproduce the tested glass, frame, anchorage, hardware, and installation conditions of an approved impact system.
Aftermarket films may have legitimate uses, but they should be evaluated for the purpose actually claimed. They can also affect manufacturer warranty terms on some products.
If hurricane protection is the goal, verify an approved impact system or another code-compliant opening-protection method.
What about old impact windows?
Age alone does not tell you whether a window is secure, but condition matters.
Have a window evaluated when you notice:
- Cracked impact glass
- Loose or damaged locks
- Sashes that do not close correctly
- Frame distortion
- Corrosion around hardware
- Previous field modifications
- Missing identification labels or unknown replacement glass
- Storm damage
Our guide to impact window repair explains why service should be product specific.
Should security be part of the buying decision?
Yes, but compare it realistically.
When evaluating impact windows, ask for:
- Exact manufacturer and product series
- Current Florida Product Approval or Miami-Dade NOA where applicable
- Glass construction offered in the quote
- Lock and hardware configuration
- Frame material and operating style
- Installation method and anchorage requirements
- Warranty and service information
- Any separate security or forced-entry test documentation if security claims go beyond hurricane-impact approval
That creates a much better comparison than relying on slogans such as “unbreakable” or “burglar proof.”
Frequently asked questions
Are impact windows burglar-proof?
No. Impact windows can create a tougher glazed barrier, but hurricane-impact approval is not a guarantee against burglary or every forced-entry method.
Can a burglar break impact glass?
Impact glass can crack and can be damaged. Laminated construction is designed to remain bonded after breakage, which can make rapid penetration more difficult than ordinary glass, but it should not be described as impossible to defeat.
Do impact windows need locks?
Yes. Operable windows still rely on appropriate locks and hardware as part of normal operation and security.
Is laminated glass the same as impact glass?
Not automatically. Laminated glass is a glass construction. A Florida impact-rated window is an approved complete system with specific glass, frame, hardware, size, pressure, anchorage, and installation conditions.
Does a Miami-Dade NOA mean the window is burglar-resistant?
A Miami-Dade NOA documents approved building-envelope performance for the product described in the NOA. Do not treat that approval as a separate burglary-resistance certification unless the product also has documentation for that specific claim.
Authoritative sources
- Florida Statutes §553.842 — Product evaluation and approval
- Miami-Dade County — Product Approval
- Miami-Dade County — Product Testing Inquiries
- Florida Building Commission — Product Approval Search
The bottom line
Impact windows can contribute to a stronger exterior opening because laminated glazing, approved frames, locks, and anchorage work together as a system. But hurricane-impact approval should not be marketed as a burglar-proof guarantee.
Use impact windows as one layer of a broader security plan that also addresses doors, locks, lighting, alarms, and everyday habits.
AA Glass & Windows can help you compare approved impact-window options for your Florida property. Request a free estimate to review your openings and priorities.
