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Types of windows: styles, frames and how to choose — Genie

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Buyer's guide

Types of windows: styles, frames and how to choose

Windows affect your home's light, ventilation, energy bills, security and curb appeal. Choosing the right styles and frames for each opening makes a real difference. Here are the main window types and how to choose.

Key takeaways

What to consider before you choose

Ventilation and operation

Some windows open fully (casement, double-hung), others partially (sliding, awning). Match to how you'll use the room.

Energy efficiency

Look for double or triple panes and low-E coatings; casement windows seal tightest. Good frames and installation prevent drafts.

Frame material

Vinyl is affordable and low-maintenance; fibreglass is durable and stable; wood is classic but needs upkeep; aluminum is strong but conducts heat.

Cleaning and maintenance

Tilt-in sashes make cleaning easy; some styles are harder to reach, especially upstairs.

The main window styles, compared

1. Double-hung

Two sashes that slide up and down; many tilt in for easy cleaning — the versatile classic.

ProsCons
  • Classic look
  • Good ventilation
  • Easy to clean (tilt-in)
  • Less airtight than casement

Best for: Most homes and traditional styles

2. Casement

Hinged on the side and cranked open — seals tightly for excellent efficiency and airflow.

ProsCons
  • Best energy seal
  • Great ventilation
  • Unobstructed view
  • Crank hardware can wear
  • Opens outward

Best for: Energy efficiency and hard-to-reach spots

3. Sliding

Sashes glide horizontally — simple, wide views and easy operation.

ProsCons
  • Easy to operate
  • Wide views
  • Low maintenance
  • Only half opens
  • Tracks need cleaning

Best for: Wide openings and modern looks

4. Awning

Hinged at the top and opening outward — lets in air even during light rain.

ProsCons
  • Ventilation in rain
  • Good seal
  • Works up high
  • Partial opening
  • Opens outward

Best for: Bathrooms, basements, paired with picture windows

5. Bay / bow

Projecting window groups that add space, light and a focal point.

ProsCons
  • Adds space and light
  • Striking look
  • Panoramic view
  • Expensive
  • Complex install

Best for: Living rooms and statement walls

6. Picture / fixed

A large non-opening window that maximizes light and views.

ProsCons
  • Max light and view
  • Very energy-efficient
  • Low cost per size
  • No ventilation

Best for: Views, paired with operable windows

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FAQ

What's the most energy-efficient window style?

Casement windows seal tightest when closed, making them among the most energy-efficient. Pair any style with double/triple panes and low-E glass.

What window frame material is best?

Vinyl is affordable and low-maintenance; fibreglass is durable and stable; wood is beautiful but needs upkeep. Choose based on budget and maintenance tolerance.

Does window installation affect performance?

Hugely — poor installation causes drafts and leaks even with great windows. It's skilled work best left to vetted pros, bookable on Genie.

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