Casement vs fixed windows
James Elston

James Elston

Published March 16, 2025

Last Updated on March 17, 2025

Casement vs Fixed Windows: Pros, Cons, & Which One to Choose

When replacing or installing new windows, choosing between casement and fixed windows is a crucial decision. Both window types offer distinct advantages, and understanding their features, benefits, and limitations will help you make an informed choice.

This expert comparison guide covers everything you need to know about casement vs fixed windows, including materials, security, insulation, ventilation, maintenance, the cost of new windows and installation.

Casement vs Fixed Windows: Which Is Better?

How Casement Windows Work

Casement windows are hinged on the side or top and open outward using a crank, lever, or push-out mechanism. Their design allows for full ventilation and an airtight seal when closed.

Key Features of Casement Windows

  • Hinged Design: Can be side-hung or top-hung (awning style).
  • Full Ventilation: Opens completely for maximum airflow.
  • Secure Closure: Creates a tight seal, reducing heat loss.
  • Varied Materials: Available in uPVC, timber, aluminium, and composite.
  • Multi-Locking Systems: Enhanced security for homes.

Casement windows are highly versatile and can be used in both modern and traditional homes. They are ideal for areas that need good ventilation, such as kitchens and bathrooms.

Pros and Cons Casement Windows

Pros
  • Excellent Ventilation – Can open fully for maximum airflow.
  • Energy Efficient – Provides a strong seal when closed, reducing heat loss.
  • Secure – Multi-point locking systems enhance security.
  • Versatile – Available in various materials and styles.
Cons
  • Wind Vulnerability – Can be affected by strong winds when open.
  • Hardware Maintenance – Hinges and cranks require upkeep.
  • Limited Size – Large casement windows may be difficult to operate.

How Fixed Windows Work

Fixed windows, also known as picture windows, are designed for unobstructed views and maximum natural light. Unlike casement windows, they do not open, making them highly energy-efficient.

Key Features of Fixed Windows

  • No Moving Parts: Fully sealed, reducing maintenance needs.
  • Large Glass Panels: Maximises natural light intake.
  • Superior Insulation: Eliminates draughts and air leakage.
  • Aesthetic Appeal: Clean, modern appearance for contemporary homes.
  • Wide Range of Glazing Options: Available in double, triple, or Low-E glass.

Fixed windows are perfect for rooms that do not require ventilation, such as stairwells, hallways, and living rooms with scenic views. They are also commonly used in commercial buildings for their sleek and modern aesthetic.

Pros and Cons Fixed Windows

Pros
  • Maximum Light Intake – Provides unobstructed outdoor views.
  • Highly Energy Efficient – No air leaks due to its sealed design.
  • Low Maintenance – No moving parts mean minimal wear and tear.
  • Modern Aesthetic – Suitable for contemporary homes and commercial buildings.
Cons
  • No Ventilation – Cannot be opened to allow airflow.
  • Cleaning Challenges – Exterior cleaning can be difficult in high places.
  • Limited Functionality – Only serves as a light source, no operational use.

Which Property Types Are Best for Casement & Fixed Windows?

Casement Windows Are Best For:

  • Detached & Semi-Detached Houses – Ideal for homes needing good airflow.
  • Period & Traditional Homes – Available in heritage styles like timber casement windows.
  • High-Rise Apartments – Enhanced security with locking mechanisms.
  • Coastal Properties – Secure against strong winds when closed.

Fixed Windows Are Best For:

  • Modern & Contemporary Homes – Clean, minimalist aesthetics.
  • Commercial Buildings & Offices – Maximises natural light without ventilation needs.
  • Loft Conversions & Extensions – Adds daylight to enclosed spaces.
  • Energy-Efficient Homes – Provides insulation with no air leaks.

View & Light Intake

  • Casement Windows: Allow ample light but can have obstructing frames, especially in multi-pane designs.
  • Fixed Windows: Offer maximum natural light and uninterrupted outdoor views, making them ideal for scenic locations.

If your priority is unobstructed views and maximum daylight, fixed windows are the superior option. If you want a balance between light and ventilation, casement windows are better suited.

Insulation & Energy Efficiency

  • Casement Windows: When closed, they create an airtight seal, preventing heat loss and reducing energy bills.
  • Fixed Windows: Offer superior insulation as they do not open, eliminating any risk of air leakage.

Glazing Options for Insulation

Glazing TypeInsulation LevelNoise ReductionCost Factor (Avg. Price)
Double GlazingHighGood£300 – £600 per window
Triple GlazingVery HighExcellent£500 – £1,000 per window
Low-E GlassExcellentGood£350 – £700 per window
Toughened GlassModerateHigh£400 – £800 per window

  • Double glazing is the standard in the UK due to its balance of insulation, noise reduction, and cost-effectiveness. It consists of two glass panes with an insulating gas layer in between, reducing heat loss and improving energy efficiency.
  • Triple glazing provides even better insulation and noise reduction, making it ideal for colder climates or noisy urban areas. However, it comes at a higher cost and may not always provide a significant improvement over double glazing in temperate regions.
  • Low-E (Low Emissivity) glass has a special coating that reflects heat back into the room, improving energy efficiency while allowing natural light to pass through. It’s a great option for energy-conscious homeowners.
  • Toughened glass is designed for safety and strength, making it a preferred choice for high-rise buildings and areas prone to breakage. While it does not provide as much insulation as Low-E or triple glazing, it is highly durable and offers good noise reduction.

Ventilation & Draughts

  • Casement Windows: Offer superior ventilation as they can open fully. Great for rooms that require airflow.
  • Fixed Windows: No ventilation since they are permanently sealed, which prevents draughts.

Security Features

  • Casement Windows: Can be locked securely, but if left open, they can be a security risk.
  • Fixed Windows: Highly secure as they cannot be opened.

For maximum security, casement windows with multi-point locking systems are recommended.

Maintenance & Longevity

FactorCasement WindowsFixed Windows
CleaningRequires regular cleaning of hinges & framesEasier to clean due to no moving parts
Wear & TearHinges & seals may need repairs over timeMinimal wear & tear
LongevityCan last 20-30 years with maintenanceCan last 30+ years due to fewer components

Fixed windows generally require less maintenance and have a longer lifespan.

Costs & Installation

Generally, fixed windows are cheaper than casement windows because they lack moving parts, hinges, and locking mechanisms. 

The cost of casement windows varies based on material and size. They require additional hardware and framing, making them more expensive to manufacture and install.

When comparing materials, uPVC is the most affordable, while timber and composite options tend to be pricier due to their aesthetic appeal and durability. 

Aluminium windows offer a balance between durability and cost, making them a popular mid-range option.

Casement Window Prices (Supply Only)

Window SizeuPVCTimberAluminiumComposite
600mm x 900mm£250 – £400£400 – £650£500 – £750£600 – £900
1200mm x 1200mm£350 – £550£650 – £900£750 – £1100£850 – £1300

Fixed Window Prices (Supply Only)

Window SizeuPVCTimberAluminiumComposite
600mm x 900mm£150 – £300£300 – £500£400 – £600£500 – £750
1200mm x 1200mm£250 – £400£500 – £750£650 – £900£750 – £1100

Installation Requirements & Timeframes

  • Casement Windows: Require frame alignment and hinge installation. Typically takes 2-4 hours per window.
  • Fixed Windows: Easier to install since there are no moving parts. Installation takes 1-3 hours per window.

How to Choose Between Casement and Fixed Windows

Selecting the right window type depends on several factors:

  • Ventilation Needs: If airflow is a priority, casement windows are the best choice.
  • Aesthetic Preference: Fixed windows provide a sleek, modern look with uninterrupted views.
  • Security Concerns: Fixed windows offer better security as they cannot be opened.
  • Energy Efficiency: Both options provide insulation, but fixed windows have no potential for air leakage.
  • Maintenance Requirements: Fixed windows require less maintenance over time.
  • Budget Considerations: Fixed windows are generally more cost-effective.

If you need both ventilation and natural light, consider a combination of casement and fixed windows for the best of both worlds.

Which Window Style Should You Choose for Your Home?

When choosing windows for your home, you may find yourself comparing various options. If you’re already considering casement vs fixed windows, you might also be wondering how other styles compare in terms of functionality and style. 

For example, if you’re interested in a design that blends functionality with a sleek appearance, you might want to explore how flush windows compare to casement windows.

In addition, if you’re torn between casement vs sash windows, it’s important to weigh the different benefits they offer, such as ease of operation and traditional appeal. Similarly, casement vs double hung windows might be something to consider if you’re looking for windows that provide a balance between ventilation and aesthetics in a classic design.

If you’re leaning towards more modern window solutions, comparing casement & sliding windows could help you understand the difference in how these windows open and their suitability for your space.

If you’re drawn to the elegance of traditional designs, you might want to check out how French windows stack up against casement windows—both offer excellent ventilation but have distinct looks.

Another comparison worth exploring is awning windows vs casement windows. These windows open outward similarly but differ in design and functionality, making one a better fit depending on your space requirements.

Finally, if you’re interested in windows that offer both practicality and style, you may want to read about the differences between casement windows & tilt and turn windows, which provide the flexibility to open in multiple ways, offering unique benefits for ventilation and ease of cleaning.

Get a Free Quote for Casement or Fixed Windows

Choosing between casement and fixed windows depends on your property’s requirements. If you’re unsure, our window specialists can help!
Request a free quote for casement or fixed windows today!

FAQs

Are casement windows more expensive than fixed windows?

Yes, casement windows are typically more expensive than fixed windows. This is because casement windows have moving parts, such as hinges and a crank mechanism, which increase manufacturing and installation costs. 

Fixed windows, on the other hand, do not open and have a simpler design, making them more affordable.

What is the purpose of a fixed window?

A fixed window is designed to provide natural light and an unobstructed view while maintaining energy efficiency. Since it does not open, it offers better insulation and security compared to operable windows, making it a great option for areas where ventilation isn’t a priority.

Can you remove a fixed window?

Yes, you can remove a fixed window, but it requires more effort than a standard operable window. Since fixed windows are securely sealed into place, removing them involves cutting through the sealant or fasteners holding the glass and frame. 

It’s recommended to hire a professional to prevent damage to the surrounding structure.

What is the difference between a fixed window and a casement window?

The key difference is that a fixed window does not open, while a casement window is hinged on the side and can swing outward for ventilation. Fixed windows are generally more energy-efficient since they have no moving parts, whereas casement windows provide better airflow and can be opened for fresh air.

James Elston

James Elston

Boiler Expert

James Elston is the top boiler replacement and heating expert at Eco Happy. He has over 20 years of experience in the industry, focusing on Gas Safe boiler installations and offering home-heating and energy-saving solutions to homeowners across the UK. From sourcing the most energy-efficient combi boiler to providing specialist heating advice, James ensures that Eco Happy maintains the highest standards and best customer service.

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