Single Hung vs Double Hung Impact Windows:
Which Is Right for Florida?
Both provide identical hurricane protection. The choice between single hung and double hung comes down to cost, cleaning convenience, and ventilation — here's the complete comparison for South Florida homeowners.
Single hung wins for most Florida homeowners — it costs 15–25% less, has fewer moving parts, and Florida's AC usage means ventilation differences rarely matter in practice. Choose double hung if you have upper-floor windows you want to clean from inside, or if you're doing a high-end renovation where aesthetics and symmetry are priorities.
What Is the Difference Between Single Hung and Double Hung Impact Windows?
A single hung impact window has one operable sash (the bottom one slides up) and a fixed top sash. A double hung has two operable sashes that both slide, and they usually tilt in for cleaning. The impact glass and hurricane rating do not depend on the style. Both types can be NOA or Florida Product Approval certified, so the choice is about price, cleaning, and airflow.
Single Hung vs Double Hung at a Glance
| Factor | Single hung | Double hung |
|---|---|---|
| Operable sashes | One (bottom) | Two (top and bottom) |
| Hurricane protection | Same when certified | Same when certified |
| Typical price | Lower | Higher (see cost table below) |
| Cleaning from inside | Exterior glass needs outside access | Sashes tilt in for cleaning |
| Ventilation | Bottom half opens | Top and bottom can open |
| Moving parts | Fewer | More |
| Availability in stock | Most common size and color combinations | Fewer listings; check current inventory |
Which One Should You Choose? Quick Decision Guide
Choose single hung if
- You are replacing existing single hung windows and want the same look
- Budget matters and you want more windows for the same money
- You run A/C most of the year and rarely open windows
- You want the widest choice in stock
Choose double hung if
- You want to clean upper-floor windows from inside
- You like opening the top sash for airflow
- The window is a feature opening where a balanced look matters
- Your HOA or architect specifies it
Common Mistakes When Choosing a Window Style
- Paying extra for double hung thinking it is stronger. Storm protection comes from the laminated glass and the approved frame, not the number of operable sashes.
- Ordering by style before measuring. Measure the rough opening (width and height in several places) and check the approved size range for the model.
- Ignoring egress. Bedrooms need a compliant escape opening. Confirm the operable area with your installer or building department.
- Mixing frame colors between styles. If you mix styles, keep brand and color consistent so the exterior looks uniform.
Check Real Prices for Your Sizes
Windows Stock Market shows in-stock PGT, ESW, and Mr. Glass windows with a price per item by size, color, and glass. Enter your opening in the instant price tool or browse the marketplace to compare single hung and double hung. For the full cost picture, see our 2026 impact window cost guide and the PGT vs ESW vs Mr. Glass comparison. If you need help with permitting, we coordinate the permit process; read the permit guide first, and the ratings guide explains what to look for on the label.
How Single Hung and Double Hung Windows Work
Single Hung Impact Window
↕ Sliding lower sash
- • Lower sash: Slides up to open
- • Upper sash: Fixed — does not move
- • Ventilation: Bottom half only
- • Cleaning: Exterior from outside; interior from inside
- • Moving parts: One balance system, one set of weatherstripping
Double Hung Impact Window
↕ Sliding lower sash (tilts in)
- • Lower sash: Slides up, tilts in for cleaning
- • Upper sash: Slides down, tilts in for cleaning
- • Ventilation: Top and bottom independently
- • Cleaning: Both sides from inside the home
- • Moving parts: Two balance systems, two tilt latches
Head-to-Head: 8 Key Factors
| Factor | Single Hung | Double Hung | Winner |
|---|---|---|---|
| Hurricane Protection | ★★★★★ Identical — both use the same impact glass assembly | ★★★★★ Identical — sash style doesn't affect glass impact rating | Tie |
| Upfront Cost | ★★★★★ 15–25% less expensive; lowest-cost impact window type | ★★★★★ 15–25% premium over single hung; more hardware = more cost | Single Hung |
| Ventilation Options | ★★★★★ Only bottom sash opens; top is fixed; less airflow control | ★★★★★ Both sashes open independently; more airflow flexibility | Double Hung |
| Cleaning Ease | ★★★★★ Exterior must be cleaned from outside; inconvenient for upper floors | ★★★★★ Both sashes tilt in; exterior glass cleaned from inside the home | Double Hung |
| Maintenance | ★★★★★ Fewer moving parts; simpler mechanism; lower long-term maintenance | ★★★★★ More hardware (two tilt latches, dual balance systems); more to maintain | Single Hung |
| Energy Efficiency | ★★★★★ Slightly fewer potential air infiltration points (only one movable sash) | ★★★★★ Comparable if properly weatherstripped; two sashes = two potential seal points | Slight edge: Single Hung |
| Availability (In-Stock) | ★★★★★ Most common type; widest in-stock selection at Windows Stock Market | ★★★★★ Less common in South Florida; fewer in-stock options; may require longer lead time | Single Hung |
| Aesthetics | ★★★★★ Clean look; slightly asymmetric at rest (sash at bottom) | ★★★★★ More symmetric rail lines; preferred for higher-end and traditional homes | Double Hung (slight) |
2026 Cost Comparison: Single Hung vs Double Hung
Prices below are installed costs at Windows Stock Market's in-stock pricing — 30–60% below retail. Standard retail pricing runs approximately 2× these figures.
| Window Size | Single Hung (WSM Price) | Double Hung (WSM Price) | Cost Difference |
|---|---|---|---|
| 24"×36" (small bedroom) | $260–$400 | $320–$500 | +$60–$100/unit |
| 30"×48" (standard) | $300–$480 | $380–$600 | +$80–$120/unit |
| 36"×60" (large single) | $350–$550 | $440–$700 | +$90–$150/unit |
| 48"×60" (wide format) | $420–$650 | $520–$800 | +$100–$150/unit |
| 12 windows (full home) | $3,600–$7,800 | $4,560–$9,600 | +$960–$1,800 total |
Prices vary by brand, glass package, and installation complexity. Call (754) 303-7130 for a project-specific quote.
Florida-Specific Advice: Why Single Hung Wins Here
The advantages of double hung windows — better ventilation and interior cleaning — matter less in South Florida than in northern climates. Here's why:
Florida homes run AC 10–11 months a year
The #1 advantage of double hung (better ventilation control) barely applies in a climate where windows are rarely opened for extended periods. When you're cooling 365 days a year, the fixed upper sash on a single hung window is a non-issue.
One-story homes don't need tilt-in cleaning
The cleaning advantage of double hung is most valuable for second and third-floor windows where reaching the exterior glass is difficult. If your South Florida home is a single-story ranch, single hung is just as easy to clean — just open the window and wipe the exterior glass from outside.
Single hung is what the market stocks
The overwhelming majority of South Florida impact window inventory — including Windows Stock Market's in-stock selection — is single hung. More options, faster availability, and better price competition. For double hung, you may face longer lead times or fewer size choices.
Insurance discounts are identical
Your wind mitigation inspector and insurance company don't differentiate between single and double hung when calculating your premium discount. Both qualify equally for the 25–45% insurance reduction, because both have the same impact glass and Miami-Dade NOA certification.
When Double Hung Impact Windows ARE Worth It
Two-story homes
Upper-floor windows are significantly easier to clean from inside with double hung. If you have second or third-story bedrooms, double hung pays for itself in convenience.
High-end renovations
Double hung's symmetric rail lines create a more refined appearance. For luxury renovations where aesthetics and resale value are top priorities, double hung is the premium choice.
Winter residents / snowbirds
If you open your Florida windows regularly during winter months (Dec–Feb), double hung's ventilation flexibility is more valuable than for year-round AC users.
New construction with tall ceilings
High-ceiling rooms benefit from double hung windows — opening the upper sash allows hot air to escape while cooler air enters through the lower sash, improving passive cooling.
Available Single & Double Hung Impact Window Brands
PGT WinGuard
- • Single hung vinyl — most popular FL product
- • Single hung aluminum — contemporary style
- • Double hung vinyl — available, premium price
- • Wind rated to 175 mph
- • Miami-Dade NOA certified
ESW (ES Windows)
- • Single hung vinyl and aluminum
- • Double hung available in select sizes
- • Budget-friendly pricing
- • Florida Product Approval certified
- • Good availability for standard sizes
Mr. Glass
- • Primarily single hung aluminum
- • Budget-friendly option
- • Florida-specific manufacturing
- • Florida Product Approval certified
- • Best for cost-conscious projects
Not Sure Which Style Is Right for Your Home?
Vieser Construction installs both single hung and double hung PGT WinGuard, ESW, and Mr. Glass windows throughout Broward, Miami-Dade, and Palm Beach. Call for a free consultation — we'll visit your home, assess your window configuration, and recommend the right style for each opening.
In-stock inventory · 2–3 week installation · Save 30–60% vs retail
Frequently Asked Questions
Can I mix single hung and double hung windows in the same home?
Yes, and it's a practical approach. Many homeowners use double hung on upper-floor windows (for easier cleaning) and single hung on ground-floor windows (for cost savings). For aesthetic consistency, keep the same brand and frame color. The two styles can look visually similar from the exterior.
Is a double hung window more likely to leak air than a single hung?
Potentially, slightly — a double hung has two movable sashes, meaning two sets of weatherstripping that must maintain a seal. However, modern PGT WinGuard and ESW double hung impact windows use high-quality pile weatherstripping that maintains tight seals for years. Properly installed, the energy efficiency difference between the two styles is minimal in real-world conditions.
Do HOAs in South Florida have preferences for single or double hung?
Most HOA architectural guidelines focus on color, frame material, and exterior appearance — not the type of operation (single vs double hung). From the outside, single hung and double hung look nearly identical. Always check your HOA's Architectural Review Guidelines before purchasing, but single vs double hung is rarely a point of restriction.
My existing windows are single hung. Should I replace with the same style?
It's the easiest path — the rough opening dimensions are typically the same for both styles, but staying with single hung means your contractor uses the most-available inventory at the lowest cost. Unless you have a specific reason to upgrade to double hung (upper-floor cleaning access, aesthetic preference), matching your existing single hung style with new single hung impact windows is the most practical and cost-efficient choice.
Which is better in Florida, single hung or double hung impact windows?
For most Florida homes, single hung. Both types can carry the same NOA or Florida Product Approval and the same hurricane rating, so protection is not the deciding factor. Single hung usually costs less and has fewer moving parts. Double hung makes sense when you want to tilt sashes in to clean upper-floor glass from inside, or when you want to open the top sash for ventilation.
Does the window style change the design pressure rating?
It can. Design pressure is tested per product and size, so a specific single hung model and a specific double hung model each have their own approved ratings. Always check the approval for the exact model and size you are ordering against the design pressure your permit requires, rather than assuming one style is stronger.
Can I get real prices for single hung and double hung windows before I call?
Yes. Windows Stock Market shows in-stock windows with a price per item by size, color, and glass. Use the instant price tool for your exact opening or browse the marketplace to compare single hung and double hung listings side by side.