Single-Hung vs. Double-Hung vs. Casement Impact Windows: What's the Difference?

When you start researching impact windows, you’ll quickly discover there are many different types. Single-hung, casement, sliding, awning, picture windows—each type has different costs, ventilation capabilities, and best applications in your home.

The good news: you don’t have to choose one type for your entire home. In fact, the smartest Miami homeowners use a mix of window types strategically throughout their home, choosing the type that works best for each specific room and opening.

This guide breaks down each type so you can understand the differences, see the cost implications, and learn which type works best for different areas of your home.

Single-Hung Impact Windows

What It Is: A single-hung window has two sashes (the movable parts)—a bottom sash that slides up and a top sash that remains fixed. Only the bottom sash opens.

Cost: $350-$700 per unit installed (most affordable impact window option)

Pros:

• Most affordable option
• Simple, reliable mechanism with fewer moving parts
• Easier to maintain (less hardware to fail)
• Very common in older Miami homes (easy retrofit)
• Excellent security (bottom sash opens only 4-6 inches when locked in position)
• Good for rooms where you primarily need minimal ventilation
• Easiest to clean from inside on lower floors (bottom sash comes all the way down)

Cons:

• Limited ventilation (only half the window opening area)
• Less aesthetically appealing to modern homebuyers
• Cleaning the exterior of the top (fixed) sash requires a ladder
• Not ideal if you want full airflow through the window

Best For:

• Bedrooms (security, adequate ventilation, low cost)
• Secondary rooms and closets
• Rental properties where affordability is priority
• Homeowners who prioritize cost savings and don’t need maximum ventilation
• Lower floors where exterior cleaning isn’t a major issue

Example Cost: 15-window home with all single-hung impact windows:

• 15 windows × $525 average = $7,875 total

Casement Impact Windows

What It Is: A casement window is side-hinged and opens outward like a door, using a hand crank (manual) or electric opener. One or both sides can operate depending on configuration.

Cost: $500-$1,100 per unit installed

Pros:

• Best ventilation: Opens fully, no obstruction, maximum airflow
• Excellent seal when closed (hinge design creates tight weatherstripping)
• Unobstructed views (no center mullion like single-hung windows)
• Very effective for catching breezes
• Modern, elegant appearance
• Both sashes clean easily from inside
• Outward opening means interior space isn’t blocked (important for small rooms)
• Best for corner installations and larger openings

Cons:

• Most expensive impact window type
• Outward opening means you can’t place furniture or window planters outside the window
• Crank handles require periodic cleaning and maintenance
• Not ideal directly adjacent to patios or walkways (outward swing is a hazard)

Best For:

• Kitchens (outstanding ventilation for cooking)
• Bathrooms (moisture management, best ventilation option)
• Master bedrooms (premium feel, excellent airflow)
• Rooms prioritizing airflow and modern aesthetics
• Locations where you want maximum views (unobstructed)
• Upper-story rooms and corners

Example Cost: 15-window home with all casement impact windows:

• 15 windows × $800 average = $12,000 total

Awning Impact Windows

What It Is: An awning window is top-hinged and opens outward and upward, like an awning. The bottom stays inside the frame, while the top edge swings out 45-90 degrees.

Cost: $400-$900 per unit installed

Pros:

• Allows ventilation even during light rain (bottom edge stays inside, water can’t blow in)
• Good for bathrooms and kitchens
• Space-efficient (doesn’t swing out as far as a casement)
• Lower cost than casement
• Modern appearance
• Good safety profile (no crank handle to pinch fingers)

Cons:

• Limited ventilation compared to casement
• Outward swing still requires clearance
• Less common than other types (fewer product options)
• Not ideal for large openings

Best For:

• Bathrooms with ventilation needs
• Kitchen windows over sinks (allows rain-proof ventilation)
• Homes in rainy climates prioritizing moisture management
• Smaller openings where casement is overkill

Example Cost: 10 bathrooms/kitchens with awning windows:

• 10 windows × $650 average = $6,500 total

Picture/Fixed Impact Windows

What It Is: A picture window (also called fixed or stationary) doesn’t open at all. It’s a large pane of glass in a frame, designed to frame a view.

Cost: $300-$700 per unit installed (lowest cost option)

Pros:

• Most affordable impact window option
• Excellent for maximizing views and light
• Minimal frame obstruction
• No moving parts, extremely low maintenance
• Best energy efficiency (no operable seals to degrade)
• Excellent for views and aesthetics
• Simplest installation

Cons:

• No ventilation (completely fixed)
• Can’t be used as a fire escape route
• Cleaning requires exterior access (ladder for large windows)

Best For:

• Large openings where views are priority (oceanfront, scenic locations)
• Rooms with excellent natural light needs
• Lobbies, hallways, dramatic living spaces
• Mixed with operable windows for views without sacrificing all ventilation
• High-rise condos where balcony windows should frame views

Example Cost: 5 large picture windows:

• 5 windows × $500 average = $2,500 total

Horizontal Sliding Impact Windows

What It Is: A horizontal slider has one or both sashes that slide horizontally—like a sliding glass door but smaller.

Cost: $500-$1,200 per unit installed

Pros:

• Great for wide openings
• Easy operation (sliding is intuitive)
• Very popular in Florida
• Good ventilation when opened (though not as good as casement)
• Can use both hands to open (easier for elderly or mobility-challenged users)
• More elegant than single-hung for contemporary homes

Cons:

• More expensive than single-hung
• Cleaning the exterior sash in position is tricky
• Weather stripping requires more maintenance
• Not as energy-efficient as casement (sliding seal isn’t as tight)

Best For:

• Wide openings that don’t fit other window types
• Florida rooms and lanais
• Contemporary homes prioritizing clean lines
• Large living room windows where easy operation is important

Example Cost: 10 large sliding windows:

• 10 windows × $850 average = $8,500 total

Strategic Window Type Combinations: Maximize Value and Function

The smartest Miami homeowners don’t choose one window type for the entire home. Instead, they mix types strategically to optimize cost, ventilation, aesthetics, and function.

Example: Comprehensive Home Strategy

Bedrooms (8 windows): Single-hung impact windows

• Cost: 8 × $450 = $3,600
• Rationale: Affordable, secure, adequate ventilation

Kitchen (3 windows): Casement impact windows

• Cost: 3 × $800 = $2,400
• Rationale: Maximum ventilation for cooking, modern look, easy to clean

Master Bedroom (2 windows): Horizontal sliding impact windows

• Cost: 2 × $850 = $1,700
• Rationale: Contemporary look, easy operation, good ventilation

Living Room (2 large picture windows): Picture impact windows

• Cost: 2 × $550 = $1,100
• Rationale: Maximize oceanfront or scenic views, minimal frame obstruction

Bathrooms (4 windows): Awning impact windows

• Cost: 4 × $700 = $2,800
• Rationale: Rain-proof ventilation, moisture management

Patio/Lanai (2 large sliding windows): Horizontal sliding impact windows

• Cost: 2 × $1,000 = $2,000
• Rationale: Wide opening coverage, easy operation

Total for 21 windows: $13,600

If this homeowner had chosen single-hung for everything: $10,500 If they’d chosen casement for everything: $16,800

The mixed strategy saves money on lower-priority rooms while upgrading premium spaces where the window type matters most.

Cost Comparison Table: Quick Reference

Window Type	Cost Per Unit	Total (15 windows)	Best Use	Ventilation
Single-Hung	$350-$700	$5,250-$10,500	Bedrooms, secondary rooms	Fair
Casement	$500-$1,100	$7,500-$16,500	Kitchens, bathrooms, premium spaces	Excellent
Awning	$400-$900	$6,000-$13,500	Bathrooms, rain-proof ventilation	Good
Picture/Fixed	$300-$700	$4,500-$10,500	Views, light, aesthetics	None
Sliding	$500-$1,200	$7,500-$18,000	Wide openings, patios	Good

Room-by-Room Recommendations

Primary Bedrooms: Casement or horizontal sliding (balance of aesthetics, ventilation, and cost)

Secondary Bedrooms: Single-hung (most affordable, adequate ventilation)

Master Bathrooms: Casement or awning (excellent ventilation for moisture management)

Secondary Bathrooms: Awning or single-hung (good ventilation, more affordable than casement)

Kitchen: Casement or awning (ventilation for cooking, easy to clean)

Living Room: Mix of picture and horizontal sliding (views with operational flexibility)

Dining Room: Picture or single-hung (aesthetics, some ventilation)

Office/Study: Single-hung or horizontal sliding (focus on cost and basic ventilation)

Florida Room/Lanai: Sliding or casement (wide openings, maximum light)

Entry Doors: Impact doors (casement-style or single-swing doors with glass)

How Window Style Affects Energy Efficiency

Beyond ventilation, different window types have different energy profiles:

Best Energy Efficiency (rated by seal quality): 1. Fixed picture windows (no moving parts, perfect seal) 2. Casement windows (exceptional seal when closed) 3. Awning windows (good seal, outward opening) 4. Single-hung (adequate seal, fewer moving parts) 5. Sliding windows (sliding seal less tight than hinged)

This is why pairing casement windows in your primary living space with single-hung windows in secondary rooms is smart: you get efficient cooling costs where you spend the most time, while still keeping overall costs reasonable.

FAQ: Choosing the Right Impact Window Types

Q: Can I mix different window types in the same room? A: Absolutely. This is very common. You might use fixed picture windows for views with smaller casement or single-hung windows for ventilation. Mix types based on functional needs and aesthetics.

Q: Which window type is most popular in Miami? A: Single-hung and casement are the most popular impact window types in South Florida. Horizontal sliding windows are also very common, especially in contemporary homes. Each is appropriate depending on the home’s style and your ventilation needs.

Q: Do I need operable windows if I have air conditioning? A: Yes. You might need ventilation during mild weather (November-April) to save on AC costs. Operable windows allow you to take advantage of cooler outdoor temperatures. Even one or two casement windows in your master bedroom or living room provides this benefit.

Q: What’s the best window type for security? A: Single-hung windows with locks that limit opening to 4-6 inches are excellent for security. Casement windows with keyed locks are also very secure. Picture windows can’t be opened at all (most secure but least flexible). All impact windows are security upgrades over standard windows because the glass can’t be broken easily.

Q: Should I choose operable windows or picture windows for maximum views? A: Picture windows block absolutely nothing if you prioritize framed views. If you want both views AND occasional ventilation, pair a large fixed picture window with smaller operable windows on either side. This gives you 80% view with 20% functional ventilation.

Q: Are casement windows worth the extra cost? A: In Miami’s hot climate where you use AC most of the year, casement windows are worth the upgrade in high-traffic areas (kitchens, master bedrooms, living rooms). In secondary bedrooms or bathrooms, single-hung or horizontal sliding offer better value. Many homeowners use casement in 4-6 key windows and single-hung elsewhere.

Q: How do I clean the outside of high windows without a ladder? A: Many modern impact windows feature removable sashes or exterior-accessible designs that simplify cleaning. Casement and awning windows swing outward, making both sides easy to reach. For single-hung windows on upper floors, professional cleaning or extending tools may be needed. Ask your contractor which windows offer easy-clean features when getting quotes.

Q: What window type is best for hurricane protection? A: All impact-rated windows provide hurricane protection regardless of type. The protection comes from the laminated glass and reinforced frame, not the operating mechanism. A fixed picture window and a casement window both protect equally well—the difference is functionality and ventilation, not hurricane protection.

Making Your Final Decision

The best impact windows for your home depend on: 1. Budget: Are you cost-conscious or willing to invest in premium options? 2. Ventilation needs: Do you want maximum airflow or minimal? 3. Aesthetics: Which style matches your home’s architecture and your personal preference? 4. Functionality: What will you use each window for day-to-day? 5. Energy efficiency: Do you want to minimize AC costs with tight-sealing windows?

Most homeowners benefit from a mixed approach: premium windows in high-traffic areas (kitchens, master bedrooms, living rooms) and more affordable options in secondary spaces.

Ready to choose the right window types for your home? We’ll assess your needs room-by-room and recommend the best types and styles for your budget and lifestyle.

Call us at [PHONE] orrequest your free estimate today. We’ll show you samples, explain the differences, and help you create a strategy that maximizes value throughout your home.