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What's the most common window type in Australian homes?

Awning windows are the most common type in Australian project homes. They open outward from the bottom (hinged at the top), can be left open in light rain, provide good ventilation, and suit most rooms. Sliding windows are also common, particularly in living areas and for wide openings.

Which window type provides the best ventilation?

Casement windows provide the best ventilation — the open sash acts like a sail, catching breezes and directing them into the room. Awning and double-hung windows also provide good ventilation. Sliding windows provide moderate ventilation (only half the opening is available). Fixed windows provide no ventilation.

Can I mix window types in the same home?

Yes — most homes use a mix of window types. For example, awning windows in bedrooms and bathrooms, sliding windows in living areas, and fixed windows for feature views. The key is to ensure the window styles and frame colours are consistent across the home for a cohesive look. Discuss your preferences with your builder.

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Doors, Windows & Hardware

Window Types Explained: Awning, Casement, Sliding & More

Awning, casement, sliding, double-hung and fixed — which window type suits each room.

6 min read·Compare My Build — Independent Resource· Updated July 2026

Key Takeaways

Awning windows are the most common type in Australian project homes — they open outward from the bottom
Casement windows open outward like a door; provide maximum ventilation but can be obstructed by eaves
Sliding windows are practical for wide openings but provide less ventilation than awning or casement
Fixed windows don't open; used for views and natural light where ventilation isn't needed
Window type affects ventilation, energy efficiency, security and cleaning

Windows affect natural light, ventilation, energy efficiency, security, views and the overall feel of every room. Understanding the different window types — and where each works best — helps you review your house plans and make informed decisions at your selection appointment.

Window Types

Awning — hinged at the top, opens outward from the bottom; can be left open in light rain; the most common type in Australian homes; good ventilation; suits most rooms
Casement — hinged at the side, opens outward like a door; maximum ventilation; can catch breezes; may be obstructed by eaves or narrow setbacks; premium look
Sliding — panels slide horizontally on tracks; practical for wide openings; doesn't protrude outward; less ventilation than awning or casement; suits living areas and alfrescos
Double-hung — two sashes that slide vertically; traditional/heritage style; good ventilation control; less common in modern project homes
Fixed (picture) — doesn't open; used for views and light where ventilation isn't needed; often combined with opening windows; suits living areas with good views
Louvre — horizontal slats that angle open; good ventilation; classic Queensland style; more maintenance (cleaning individual slats)

Where Each Type Works Best

Bedrooms — awning or casement; can be left open for ventilation; awning can stay open in rain
Bathrooms — awning; provides ventilation while maintaining privacy; can be positioned high on the wall
Living areas — sliding or fixed + awning combo; sliding for wide openings, fixed for views, awning for ventilation
Kitchen — awning or sliding; above sinks, awning is easier to reach (opens with a winder)
Laundry — awning; ventilation for moisture; high on the wall for privacy
Alfresco — sliding or bi-fold; for wide openings that connect indoor and outdoor

Ventilation Comparison

Window type affects how much air flows through the room when the window is open:

Casement — best; the open sash acts as a sail, catching breezes and directing them inside
Awning — good; opens from the bottom, allowing air to flow while keeping rain out
Double-hung — good; opening both top and bottom creates convection airflow
Sliding — moderate; only half the opening is available for airflow at any time
Fixed — none; doesn't open

Energy Efficiency Considerations

All window types can be single or double glazed. The frame material (aluminium vs timber vs uPVC) and glass type (single, double, low-E) affect energy efficiency more than the window operating type. However, awning and casement windows generally seal tighter when closed (compression seal) than sliding windows (sliding seal), providing slightly better air-tightness and draught prevention.

Example Window Upgrade Costs

Upgrade	Example Cost
Casement windows (vs awning)	$100–$400 per window
Larger window size	$100–$500+ per window
Feature window shape (circular, arched)	$300–$1,000+
Double glazing upgrade	$200–$600 per window
Timber window frames (vs aluminium)	$200–$800 per window

Real-world examples only. Costs vary by builder, window size, type and specification.

Questions to Ask Your Builder

What window types does the builder include as standard — awning, sliding, or a mix?
Can I change window types in specific rooms (e.g. casement in bedrooms, sliding in living)?
What window sizes are standard, and what's the cost to upgrade to larger windows?
Do the standard windows include fly screens, or are those an upgrade?

Common Mistakes to Avoid

Using fixed windows in rooms that need ventilation — bathrooms, laundries and kitchens
Choosing sliding windows where casement would provide better ventilation and sealing
Not checking window sizes on the house plans — assuming all windows are the same size
Forgetting fly screens — without them, windows can't be opened for ventilation without insects

Builder Tips

Awning windows are the most versatile — they seal well, can stay open in rain, and suit most rooms
Casement windows on the breeze side catch wind; pair with awning on the opposite side for cross-ventilation
Keep window frame colours consistent across the home for a cohesive exterior
Above sinks, awning windows with a winder are easier to reach than sliding windows

Aluminium vs Timber Windows

Compare frame materials before choosing your windows.

Read the Guide