Double Glazed Casement Windows

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2025 Guide to Double Glazed Casement Windows.



What Are Casement Windows?

 

Casement windows are hinged on one side, allowing them to open outward like a door. This design offers a clean, modern look while providing excellent ventilation. You can find them in a variety of styles, making them a versatile option that suits many home aesthetics—from traditional to contemporary.




The Casement Window’s History

 

The casement window dates back centuries, originally used in medieval architecture. Their popularity has endured through the ages, thanks to their timeless design and functionality. In the UK, casement windows can be seen in homes ranging from historic Georgian buildings to modern new builds.

 

 

replacement casement windows

 

Styles of Double Glazed Casement Windows

 

Casement windows come in various styles to suit the unique character of your home. Here are a few popular options:

 

  1. Single Casement Windows

A single casement window features one hinged sash, providing a simple yet stylish option. This design is excellent for smaller spaces, such as bathrooms or utility rooms.

 

  1. Double Casement Windows

Double casement windows consist of two hinged sashes that open outwards. This style offers a broader view and increased ventilation, making it ideal for larger rooms.

 

  1. French Casement Windows

French casement windows are a pair of casement windows that open outwards without a central mullion. They provide an expansive view and are often used for patio entrances, creating a seamless connection between indoor and outdoor spaces.

 

  1. Bay or Bow Casement Windows

These windows are angled, creating additional interior space and enhancing exterior curb appeal. They often combine multiple casement windows, bringing more light and air into your home.

 

  1. Tilt and Turn Casement Windows

Perfect for modern homes, tilt and turn windows can be opened in two ways—tilting inwards for ventilation or fully turning to swing open like a casement window. This versatility makes them particularly appealing to homeowners seeking flexibility.








Materials used in Double Glazed Casement Windows

 

When it comes to materials, casement windows can be crafted from a variety of options that each offer unique benefits. Here are some of the most common materials used:

 

  1. uPVC

uPVC, or unplasticised polyvinyl chloride, is the most popular choice for casement windows in the UK. It’s affordable, low maintenance, and offers excellent insulation. uPVC windows are available in various finishes and colours, including wood-effect options that mimic traditional timber.

 

  1. Timber

Timber casement windows bring a warm, natural feel to your home. While they require more maintenance than uPVC, modern treatments can help them resist weathering and decay. Timber windows are often chosen for period properties to maintain their authentic character, stained or painted in various hues.

 

  1. Aluminium

Aluminium casement windows are known for their slim frames and modern aesthetic. They are highly durable and resistant to rust and corrosion. While typically more expensive than uPVC or timber, aluminium windows offer excellent performance and longevity.






Colours and Finishes of Double Glazed Casement Windows

 

When it comes to choosing colours and finishes for your casement windows, the options are virtually limitless! Here are some popular colour choices in the UK:

 

  1. Classic White

Timeless and versatile, white casement windows can complement virtually any architectural style. They bright up spaces and create a clean, sharp contrast against coloured walls.

 

  1. Traditional Wood Stains

If you opt for timber frames, a classic wood stain can enhance the natural beauty and grain of the wood, providing a warm, inviting look.

 

  1. Bold Colours

If you’re looking to make a statement, consider bold colours like navy blue, forest green, or deep red. Many manufacturers offer bold shades that can add a distinct character to your home.

 

  1. Muted Tones

Soft tones like lavender, dove grey, or pastel shades can create a serene look that blends beautifully with your surroundings.

 

  1. Dual Colours

For added flexibility, you can choose dual-colour frames, where the exterior colour contrast with the interior. This allows you to match your windows to your home’s exterior while keeping your interior décor in mind.





Costs of Double Glazed Casement Windows

 

Understanding the costs associated with casement windows can help you plan your home improvement budget effectively. Prices can vary widely based on materials, sizes, and custom features.

 

  1. uPVC Casement Windows

Generally, uPVC windows are the most budget-friendly option, with estimated costs ranging from £150 to £800 per window, depending on the size and features. Installation costs usually add another £200 to £500.

 

  1. Timber Casement Windows

Timber windows can be pricier, costing between £500 and £1,200 per window. Installation can run from £300 to £600 due to the extra care required when working with wood.

 

  1. Aluminium Casement Windows

Aluminium frames tend to fall on the upper end of the price spectrum, costing anywhere from £1,000 to £2,500 per window. Installation costs will typically be similar to timber windows.





Additional Costs

Keep in mind that you may incur additional costs for features like custom glazing (e.g., triple-glazing for increased insulation), decorative features, or bespoke sizes. 









Benefits of Double Glazed Casement Windows

 

Still on the fence about whether casement windows are right for your home? Let’s explore some compelling benefits:

 

  1. Outstanding Ventilation

The outward-opening design of casement windows allows for excellent airflow. They can be fully opened to catch breezes, ensuring that your home remains well-ventilated.

 

  1. Energy Efficiency

Casement windows are designed to create a tight seal when closed. This helps to reduce drafts and conserve energy, leading to lower heating bills. Homeowners who choose energy-efficient glazing further enhance these benefits

 

  1. Security

When closed, casement windows are difficult to force open, thanks to their locking mechanisms and tight seals. For added peace of mind, many brands incorporate multi-point locking systems for enhanced security.

 

  1. Easy Operation

Operated with a simple crank mechanism or handle, casement windows are easy to open and close, even in hard-to-reach areas, like above a sink.

 

  1. Aesthetic Appeal

Their clean lines and variety of styles mean that casement windows can enhance a wide range of architectural aesthetics, from traditional to contemporary styles.

 

  1. Low Maintenance

Especially with uPVC and aluminium materials, these windows are designed for durability and require minimal upkeep, leaving you more time to enjoy your home.

 

  1. Increased Natural Light

Since they can be larger than some other window types, casement windows can let in a significant amount of light, brightening up your space.






Is a Double Glazed Casement Window Right for You?

 

As with any home improvement project, it’s important to consider your specific needs and preferences when deciding on casement windows. Think about the style of your home, your budget, and your desired level of maintenance. Discuss your options with a trusted window supplier to explore the possibilities.




Casement windows are a great investment for any homeowner looking to blend style, functionality, and performance. They provide a timeless appeal and are available in various styles, materials, and colours to suit your home’s design. Not only do they offer excellent ventilation and energy efficiency, but they are also known for their durability and low maintenance. 

 

With a variety of options to fit your budget, it’s no wonder that casement windows continue to be a popular choice throughout the UK.

 

 

 

 

 

upvc casement window

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