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Published on December 6, 2023 9:23 AM
If you’re in the market for new windows, you might be exploring various window frame materials as an alternative to the popular uPVC type. Each material possesses its own unique properties, influencing the appearance of your house and factors like cost, insulation, and noise control.

In this guide, we’ll delve into the world of aluminium windows, covering different styles, available glazing options, pros and cons, and, importantly, pricing. So, let’s get started.

What Are Aluminium Windows?

Aluminium windows stand out due to their lightweight nature and enhanced durability when compared to other popular materials like uPVC windows and timber windows.

Aluminium Flush casementAluminium window
Casement window Heritage aluminiumHeritage window
Homeowners favour aluminium frames for their low-maintenance qualities, strength, and longevity, all while adding a sleek and modern aesthetic to their homes.

The inherent strength and lightness of aluminium allow for the creation of thinner window frames without compromising structural integrity. These frames also resist rot and rust, making them ideal for properties near the sea or exposed to extreme weather conditions.

Aluminium windows are often chosen for their contemporary appearance, blending seamlessly with modern architectural styles. Their design versatility extends to the ability to be powder-coated in nearly any colour and offering various finish options to complement most property designs. Now, let’s explore the different styles of aluminium windows available.

Styles of Aluminium Windows

Aluminium windows come in a range of styles, with some of the most popular including:

1. Casement Windows
2. Sash Windows
3. Bay Windows
4. Bow Windows
5. Tilt-and-Turn Windows
6. Fixed Windows
7. Flush Casement Windows
8. Heritage Windows

Let’s take a closer look at the key features of each style:

Aluminium Casement Windows

Aluminium casement windows are minimalist and open outward like a door, with hinges on either the left or right side. They offer unobstructed views and excellent ventilation.

Aluminium Sash Windows

Aluminium sash windows suit both modern and traditional properties, featuring vertically sliding windowpanes that can be configured in various ways.

Aluminium Bay Windows

Aluminium bay windows extend from a property’s main wall, often with three windowpanes at varying angles to create an angular or rectangular shape, offering additional space and panoramic views.

Heritage fixed window ref. Newform - Morley development-fixed heritage auminium windowFixed heritage window
Aluminium Flush Agate Grey window

Aluminium Bow Windows

Similar to bay windows, aluminium bow windows protrude from the wall but typically have four to six windowpanes, creating a curved shape and providing additional space and panoramic views.

Tilt-and-Turn Aluminium Windows

Tilt-and-turn aluminium windows offer two inward-opening options: an inward swing like a door and a tilt option for tilting in at the top for smaller openings, providing both ventilation and security benefits.

Fixed Aluminium Windows

Fixed or picture windows have no openings and are used to provide uninterrupted views and maximize natural light in combination with other window styles.

Aluminium Flush Casements

Aluminium flush casement windows are suitable for the replacement of old timber windows as well as a contemporary buildings.

Heritage Windows

Alitherm Heritage windows are inspired by the aesthetics of traditional Steel windows, Alitherm Heritage features signature slim sightlines and attractive contours making it the ideal choice for heritage building conservation areas where building regulations demand a like-for-like replacement. In this range there is also one of the most popular French door options available – Alitherm Heritage doors.

When selecting the right style of aluminium window for your home, consider factors such as opening options, ventilation, views, and specific design requirements.

Glass Options for Aluminium Windows

Aluminium windows offer various glass options, including:

1. Double Glazing
2. Triple Glazing
3. Decorative Glass
4. Frosted Glass
5. Tinted Glass
6. Low Emission Glass

Here’s a summary of each option:

Double-Glazed Glass

Double-glazed windows consist of two panes of glass separated by an air-sealed space. They enhance energy efficiency, reduce exterior noise, and improve indoor comfort by limiting heat transfer.

Triple-Glazed Glass

Triple-glazed windows have an extra pane of glass and an additional air-sealed space, offering even greater energy efficiency and noise reduction, but at a higher cost and potentially less natural light.

Decorative and Frosted Glass

Decorative glass adds aesthetic appeal and can be customized to meet design preferences. Frosted glass, often used for bathroom windows, provides privacy while allowing natural light.

Tinted Glass

Tinted glass reduces light and heat transmission, making it suitable for areas with intense sunlight and glare, protecting against UV rays.

Low Emission Glass

Low-emission glass features a thin film that reflects heat back into the property, improving energy efficiency and reducing UV rays’ impact.
When choosing glass for your aluminium windows, consider factors like privacy, design, energy efficiency, noise reduction, and UV ray protection.

Cost of Aluminium Windows

Several factors influence the cost of aluminium windows, including window type, glass choice, manufacturer, location, design features, security requirements, and the number and size of windows.
Window style significantly impacts the cost. For instance, in the UK, an aluminium casement window averages between £450 and £650, while an aluminium bay window costs between £1,500 and £1,700
Bespoke design features, added security, and window hardware will increase costs.

Pros and Cons of Aluminium Windows: Aluminium windows have several advantages and disadvantages:


1. Durability and Strength: Aluminium windows offer slim profiles with structural integrity, resisting rust and rot, making them suitable for coastal and extreme weather areas.
2. Design Options: They come in various styles, colours, and finishes, suiting most home designs.
3. Low Maintenance: Aluminium windows require minimal upkeep and can last up to 40 years.
4. Eco-Friendly: Aluminium is recyclable, making it an environmentally friendly choice.


1. Upfront Cost: Aluminium windows are more expensive initially but may save money in the long run due to their longevity.
2. Thermal Efficiency: In general aluminium is less thermally efficient than uPVC windows and timber windows but all modern aluminium windows now have thermal breaks that mitigate this issue.
3. Noise Transmission: Aluminium windows transmit more noise compared to other materials, which can be a concern in noisy areas.

Consider your specific window needs and weigh the pros and cons when deciding if aluminium windows are the right choice for your home.

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Colin Greenslade
Written by Colin Greenslade
I'm the founder of Colin's Sash Windows. I disrupted the sash windows market in the UK in 2014 by introducing fixed prices for uPVC sash windows in the UK. Before this they were generally only available at very high prices through window installers. Today our business is one of the market leaders in supply only windows, doors and roofs in the UK.

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