Single-Hung Impact Windows Miami: Complete Guide
The most popular impact window in South Florida — reliable hurricane protection, excellent weathersealing, and the best value per opening.
The single-hung window is the most common impact window style installed in South Florida homes, and for good reason. Its straightforward design delivers reliable hurricane protection, excellent weathersealing, and lower costs compared to more complex window configurations. If you are replacing windows in a typical Miami-Dade or Broward County home, there is a strong chance that single-hung impact windows will make up the majority of your order.
This guide covers how single-hung impact windows work, what makes them the preferred choice for Florida's High Velocity Hurricane Zone, the models and frame materials available from top manufacturers, realistic Miami-area pricing, and exactly what to look for before you buy. Whether you are building a new home or upgrading aging windows, this page will help you make a confident decision.
How Single-Hung Impact Windows Work
A single-hung window has two sashes stacked vertically inside a single frame. The upper sash is permanently fixed in place and does not move. The lower sash slides up along vertical tracks to open the window for ventilation, and slides back down to close. A cam-lock mechanism at the meeting rail locks the two sashes together when the window is closed, creating a tight seal against wind, rain, and air infiltration.
In an impact-rated single-hung window, both sashes contain laminated glass made from two panes of tempered or annealed glass bonded to a tough interlayer, typically polyvinyl butyral (PVB) or the stronger SentryGlas Plus (SGP) ionoplast material. If wind-borne debris strikes the glass during a hurricane, the outer pane may crack, but the interlayer holds the shattered fragments together. The window remains sealed in its frame and continues to protect the building envelope.
The frame itself is engineered to withstand sustained positive and negative pressure cycling that simulates hurricane conditions. Reinforced aluminum or multi-chambered vinyl frames include heavy-duty sash guides, stainless-steel or zinc-coated hardware, and integrated weatherstripping on all four sides of each sash. The entire assembly is tested and certified as a complete unit under Florida product approval protocols.
Benefits of Single-Hung Impact Windows
A combination of advantages that make them the default choice for residential installations throughout Miami-Dade, Broward, and Palm Beach counties.
Hurricane Protection
Laminated impact glass withstands large and small missile impact testing per Miami-Dade protocols TAS 201, 202, and 203. Your home stays sealed even after a direct hit at 170+ mph.
Lower Cost Per Opening
Fewer moving parts and less hardware than casement, awning, or double-hung windows reduces manufacturing cost and installed price.
Reduced Maintenance
Only one operable sash means fewer balance mechanisms, fewer lock points, and less weatherstripping to inspect and maintain over the life of the window.
Excellent Weathersealing
The fixed upper sash and single meeting rail create a tight seal that resists air and water infiltration, contributing to better energy efficiency.
Insurance Savings
Installing impact windows qualifies you for significant windstorm insurance savings. Many homeowners see 25–30% reductions on windstorm premiums.
Security
Laminated glass resists forced entry. Burglars cannot quickly break through impact glass the way they can with standard glass units.
Noise Reduction
PVB or SGP interlayers dampen exterior noise significantly — noticeable improvement near highways, airports, or busy areas.
UV Protection
The interlayer blocks over 99% of ultraviolet radiation, protecting furniture, flooring, artwork, and interior finishes from fading.
The Most Versatile Window for South Florida Homes
Single-hung impact windows fit the widest range of standard openings and work well in nearly every room of a typical home — bedrooms, living rooms, hallways, stairwells, bathrooms, and multi-story installations.
Best Applications for Single-Hung Impact Windows
Bedrooms and Living Rooms
Standard bedroom and living room window openings in Miami homes are typically taller than they are wide, which matches the vertical orientation of a single-hung window perfectly. For larger living room walls, you can install multiple single-hung units side by side or pair them with a fixed picture window in the center for a combination that maximizes both views and ventilation.
Hallways and Stairwells
The vertical sliding action requires no interior clearance, unlike casement windows that swing outward. This makes single-hung units practical in tight spaces where an outward-opening sash would conflict with walkways, landscaping, or adjacent structures.
Bathrooms
Bathrooms commonly have smaller window openings, and single-hung impact windows are available in compact sizes to fit. For privacy, many homeowners choose obscure or frosted laminated glass options. If your bathroom opening is wider than it is tall, a horizontal roller impact window may be a better fit.
Multi-Story Homes
For second- and third-floor windows that are difficult to access from the outside, single-hung impact windows eliminate the need for storm shutters entirely. Once installed, they provide permanent hurricane protection with no pre-storm preparation.
Impact Rating and Code Compliance
Every impact window installed within the HVHZ must carry a valid Miami-Dade County Notice of Acceptance (NOA) and comply with the current Florida Building Code, 8th Edition (2023).
Frame Material Options
Single-hung impact windows are available in two primary frame materials in the South Florida market.
Vinyl Frames
Pros
- Excellent thermal insulation (multi-chambered)
- Corrosion-resistant — no painting required
- Lower cost (10-25% less than aluminum)
- Will not rot or warp
Cons
- Bulkier profiles, less glass area
- Limited color options without lamination
- Not ideal for very large openings
Best for: Most single-story and two-story homes seeking value and energy efficiency
Aluminum Frames
Pros
- Narrower profiles — more glass, more light
- Higher strength for large openings
- Wide range of finishes (anodized, powder-coat)
- Thermally broken options available
Cons
- Higher cost than vinyl
- Conducts heat without thermal break
- Requires thermal break for best efficiency
Best for: Modern architecture, slim sightlines, large openings, or high DP requirements
Single-Hung Impact Window Costs in Miami
Pricing typically ranges from $400 to $900 per window, fully installed. This includes the window unit, removal and disposal of the old window, installation labor, caulking, interior and exterior trim work, and basic clean-up. Permit fees are separate.
Standard Vinyl (36×48")
Most common residential size
Large Vinyl (48×72")
Standard Aluminum
Large/High-DP Aluminum
Thermally broken, premium finishes
What to Look For When Buying Single-Hung Impact Windows
Not all single-hung impact windows are created equal. Here is what you should evaluate before signing a contract.
For a broader look at all impact window styles, including horizontal rollers, picture windows, casement windows, and custom shapes, return to our main impact windows guide. For entry point protection, see our impact doors guide and hurricane protection resource.
Ready to Protect Your Miami Home?
National Glass & Construction has been installing impact-resistant doors and windows across South Florida for over 35 years. Get your free, no-obligation estimate today.