Impact glass,
clearly explained.
Straightforward answers to common questions about impact windows, entry doors and sliding glass doors for Southwest Florida homes.
Know what you're buying.
Impact products come with a lot of terminology. Our goal is to make the important parts easier to understand before you make a decision for your home.
Every home and opening can be different. Product approvals, permitting requirements, installation details and pricing should be confirmed for your specific project.
What are impact windows?
Impact windows are window systems designed and tested to resist wind pressure and impacts from wind-borne debris when used in an approved assembly. The glass commonly uses a laminated construction that helps hold broken glass together instead of leaving the opening immediately exposed.
Do I still need hurricane shutters if I install impact windows and doors?
When an opening is protected by a properly approved and installed impact-rated product for the applicable conditions, separate shutters are generally not used over that opening for hurricane protection. Your specific product approval, installation and local requirements still matter.
Can impact glass still break?
Yes. Impact-resistant does not mean unbreakable. The glass can crack when struck. Its laminated construction is designed to help the glass remain together and maintain a protective barrier rather than behaving like ordinary annealed glass.
What's the difference between impact glass and regular glass?
The biggest difference is the complete tested system and the laminated impact-resistant glazing. Impact products are evaluated as assemblies—including the frame, glass, anchoring and other components—for specific performance requirements.
Will impact windows reduce outside noise?
They can. Laminated glass and a better-sealed modern window system may noticeably reduce outside sound compared with older windows, although the result varies with the home, glass configuration and source of the noise.
Do impact windows and doors add home security?
Yes—impact-rated windows and doors can add another physical barrier at vulnerable openings. Laminated impact glass is designed so that, even when the glass cracks, the interlayer helps hold the broken glass together rather than immediately leaving an open hole. That can make forced entry through the glazing more difficult than with ordinary glass.
Impact products should be viewed as one layer of home security, not a burglar-proof guarantee. Locks, doors, alarms, lighting and other security measures still matter. A commonly cited home-security statistic says about 23% of break-ins use a first-floor window as the entry point; because the statistic is widely repeated but is not a current FBI entry-point table, we prefer to present it with that qualification rather than as a definitive current national figure.
Can impact windows make my home more energy efficient?
They can improve energy performance when replacing older, inefficient windows, but impact resistance and energy efficiency are separate characteristics. Glass coatings, frame design, U-factor, solar heat gain coefficient and installation all affect energy performance.
What are Low-E glass, U-factor and SHGC?
Low-E refers to a low-emissivity coating used to manage heat transfer through glass. U-factor describes the rate of heat transfer through the product; lower values generally indicate better insulating performance. SHGC, or Solar Heat Gain Coefficient, describes how much solar heat enters through the product; lower numbers mean less solar heat gain.
What does HVHZ mean, and is Southwest Florida in it?
HVHZ stands for High-Velocity Hurricane Zone. Under the Florida Building Code, the HVHZ consists of Miami-Dade and Broward counties. Englewood, Rotonda West, Port Charlotte, Placida, Cape Haze and Charlotte County are outside the HVHZ.
That does not mean Southwest Florida is exempt from hurricane or wind requirements. Homes here are still subject to applicable Florida Building Code requirements, including wind and opening-protection requirements based on the property, location and project conditions.
You may still see products advertised as “Miami-Dade approved” or “HVHZ approved.” Those terms describe product approvals or eligibility for use under HVHZ requirements; they do not mean every Southwest Florida project requires an HVHZ-approved product. The exact product approval, impact rating, design pressure and installation requirements should be checked for the specific opening and project.
What is a Florida product approval or Miami-Dade NOA?
These are documentation used to show that specific building products or systems meet defined requirements. A Miami-Dade Notice of Acceptance (NOA) is one type of approval commonly encountered with windows and doors. The correct approval and installation details depend on the product and project location.
What does DP mean on a window or door?
DP commonly refers to design pressure. It relates to the pressure a particular product configuration has been tested or rated to withstand. The required design pressures are project-specific, so a higher number should not be treated as the only measure of whether a product is appropriate for a particular opening.
Do impact windows help protect against UV fading?
Laminated glass and certain glass configurations can reduce transmission of ultraviolet radiation, which may help reduce fading of flooring, furniture and fabrics. Performance varies by glass package, so specifications should be checked for the product you're considering.
Can you replace only a few windows instead of the whole house?
Many projects can be completed in phases. Whether replacing one opening or planning a whole-home upgrade, the individual openings, desired products and project requirements should be reviewed first.
Can sliding glass doors and entry doors be upgraded to impact-rated products?
Yes. Impact-rated options are available for windows, entry doors and sliding glass doors. The correct configuration depends on the size of the opening, product approval, design requirements and the home's construction.
How long does an impact window and door installation take?
There isn't one accurate timeline for every project. The number and type of openings, site conditions, permitting, product availability and required work around the openings can all affect the schedule. We review the expected process for your particular project before work begins.
Will my project need a permit?
Window and exterior-door replacement work commonly requires permitting in Florida. The exact requirements depend on the scope and local jurisdiction, so permitting requirements should be confirmed for the property and project.
Will impact windows lower my homeowners insurance?
Impact protection may affect wind-mitigation features considered by an insurer, but an insurance discount is not automatic and the amount varies by carrier, policy, home and documented mitigation features. Ask your insurance agent how a proposed upgrade could affect your specific policy.
How much do impact windows and doors cost?
Pricing varies considerably by opening size, product series, glass package, configuration, installation conditions and project scope. That's why we prefer to measure the actual openings and prepare a written proposal rather than advertise a one-size-fits-all price.
What areas do you serve?
Our current website lists Englewood, Rotonda West, Port Charlotte, Cape Haze, Placida and Charlotte County. If you're nearby and aren't sure whether you're in our service area, call 941-224-6759 and we'll give you a quick answer.
Do you offer free estimates?
Yes. You can request a free in-home estimate for impact windows, impact entry doors and impact sliding glass doors. Call 941-224-6759 or use the estimate form on our homepage.
Let's talk about your home.
Tell us what you're considering and we'll help you understand the options for your openings and project.