Impact Window Installation in South Florida

Impact windows do the job of storm shutters with nothing to put up when a hurricane is on the way, and they make a house quieter and more comfortable the rest of the year. National Glass & Construction installs them in homes across Miami-Dade, Broward and Palm Beach counties, matching each opening to an approved product and carrying the job through permit and inspection.

White-framed window wall with fixed lower panes and sliding upper windows on a stucco building
Planning Your Windows

Picking the Right Window for Each Opening

  • Window Styles: Single-hung windows suit bedrooms and baths in traditional homes, horizontal rollers work well in wide, short openings, casements crank fully open to catch a breeze, awnings vent while shedding light rain, and fixed picture windows and custom shapes bring in light where nothing needs to open. Most houses end up with a mix, chosen opening by opening.

  • Bedrooms and Egress: A window in a sleeping room has to work as an emergency exit, so its style and clear opening matter as much as its rating. Casements are a common answer when a single-hung unit would not open wide enough. We check egress on every bedroom window before recommending a product, which avoids a failed inspection later.

  • Frames, Colors and Grids: Aluminum frames are widely used in South Florida because they carry heavy laminated glass well, and some product lines are also offered in vinyl. Finishes include white, bronze and black, and grids set between the glass can echo a Mediterranean or colonial facade. On a partial project, we check how closely new frames can match the windows that stay.

Black-framed glass partitions separating treatment chairs in a dental office
How We Install

What Happens on an Installation Job

  • Ratings Matched to Your Address: Miami-Dade and Broward are in the High-Velocity Hurricane Zone, where windows need a Miami-Dade NOA or an HVHZ-valid Florida Product Approval; Palm Beach County projects usually rely on a Florida Product Approval. In any county, the required design pressure changes with building height, exposure and the window's position on the wall, and openings near the ground generally call for a large-missile rating. Every unit is sized to those requirements.

  • Anchoring and Waterproofing: A window performs only as well as its installation. Each approval document spells out the fasteners, spacing and substrate the unit was tested with, and our installers follow it. Openings are checked for rot or damaged concrete before the window goes in, and the perimeter is sealed so wind-driven rain stays outside.

  • Permits and Inspections: Every installation runs under a building permit. We prepare and submit the application with the approval documents, coordinate the inspections, and handle any corrections the inspector asks for. As a licensed, insured and bonded contractor founded in 1986, National Glass & Construction treats the inspection as part of the job, not an afterthought.

Frequently Asked Questions

Can impact windows go into a home that still uses hurricane shutters?

Yes. Impact windows serve as the opening protection on their own, so once they are in, shutters or panels are no longer needed on those openings. Many owners have the old tracks and hardware taken down during the project and the wall patched. If you plan to switch some openings now and others later, the work can be phased.

What is the difference between large-missile and small-missile ratings?

Both describe the impact test a window passed. Large-missile testing simulates heavy debris such as a piece of lumber striking the glass, and it is generally required for openings near ground level. Small-missile ratings, tested against smaller debris like roof gravel, are acceptable only on openings high enough above grade where the code allows. For houses and low-rise buildings, large-missile products are the norm.

Is new construction or an addition handled differently from existing openings?

New openings are built to the window's size, so units can be ordered from the drawings, verified on site, and installed once the walls are ready, in step with the builder's schedule. Existing openings are measured in the field after we see how the old frames were set. In both cases, the product approval and the permit dictate how each window is anchored.

What drives the cost of an impact window installation?

The main factors are the number and size of windows, the style of each one, the glass you choose, the frame color, and the design pressure and missile rating required, since heavier systems cost more. Site conditions add to it: upper-floor access, openings that need repair, removing old shutters, and stucco or interior finishing. Ask us to walk you through the proposal and we will explain what each line covers.

Which window brands do you install?

We work with manufacturers including ES Windows, ECO Window Systems, MR-Glass Doors & Windows and Aldora, and on commercial glazing we also source from Trulite, Oldcastle, CRL and Viracon. We recommend a product based on the opening, the rating it needs and your budget rather than steering every job to a single line.

Do impact windows keep the house cooler?

The laminated glass in every impact window blocks most ultraviolet light and reduces outside noise, but on its own it does little about heat. The difference comes from the glass package: a Low-E coating reflects much of the sun's heat, and an insulated laminated unit slows heat moving through the glass. For hot, sun-facing rooms, those options are worth comparing.

Ready to Retire the Shutters?

Call (305) 599-0909 or request a free estimate, and we will measure every opening and recommend windows rated for your address.

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