Aluminium windows have become one of the most popular choices for homeowners, architects and developers. Once associated mainly with commercial buildings and contemporary buildings, today’s aluminium windows are very much in the minds of homeonwers looking for new windows and doors, compared to years ago, when uPVC was considered the only option.
Aluminium windows available today are safe, secure, very thermally efficient, and come in a substantial range of styles, designs and opening configurations. They are therefore suitable for virtually every type of property.
Whether you are replacing existing windows, building an extension, renovating a period property or designing a contemporary new-build home, aluminium windows provide excellent durability, slim sightlines, low maintenance and outstanding long-term performance.
The strength of aluminium allows larger areas of glass, wider and taller opening windows, slimmer frames and more design flexibility than many other window materials.
Here, we explain the different styles of aluminium windows available and what makes aluminium such a popular material for modern glazing.
Who makes the best aluminium windows?
Find out which aluminium windows are the best in terms of brand, quality, traditional and contemporary designs, opening options and more.
Aluminium windows buying guide
Everything you need to know about buying aluminium windows to replace old ones, a new build home or an extension.
Aluminium Window Styles Explained
One of the biggest misconceptions about aluminium windows is that they are only suitable for modern homes. In reality, aluminium can be manufactured into traditional, contemporary and heritage-inspired designs.
From slim contemporary casement windows to steel-look glazing, sash-inspired designs and large architectural glazing, there is now an aluminium window solution for almost every property type.
Tilt and Turn Windows
Tilt and turn windows have been popular for decades in European and Scandinavian countries, but were little known in the UK due to limited suppliers and the trend for casement windows in our homes. Today, tilt and turn windows are growing in popularity because they are significantly better than regular
Find out more
Oriel windows and frameless box windows
Oriel windows, also called frameless box windows, are a current architectural trend among homeowners and architects. Their modern features, which seamlessly blend functionality with striking aesthetics, fill a room with more light than a traditional window, adding a contemporary touch to any space. Oriel windows have the added benefits of
Find out more
Slimline Aluminium Windows
When you need new aluminium windows, whether as a replacement for existing windows or for a new building project, slimline aluminium windows can be a top priority for many buyers, over and above other features. Right now, Smart Systems provides the best in slimline aluminium windows. If finding aluminium windows
Find out more
Aluminium Sliding Sash Windows
When it comes to buying aluminium sliding sash windows, there are substantially fewer choices compared with general casement windows. Here we provide some general information about buying aluminium sliding sash windows and the product choices available. Understanding aluminium sliding sash windows With the demise of the Alumatherm product by Clearview,
Find out more
Steel look windows
Steel windows and doors have long captured the imagination with their timeless style, ultra-slim frames, and heritage appeal. Yet genuine steel can be costly, take longer to produce, and can struggle with U-Values. Aluminium steel-look glazing steps in to offer you the best of both worlds—classic design paired with modern
Find out more
Frameless Windows
Frameless windows are aluminium and glass products designed to provide a contemporary modern aesthetic with maximum visible glass and minimum visible window frame. So called ‘frameless windows’ are generally fixed windows or floor-to-ceiling glazing with hidden frames, giving an all-glass appearance to provide architectural glazing features; they can also be
Find out more
Crittall Windows
Do you have a house with old Crittall® windows or other steel casements? The options for replacing Crittall windows with aluminium are now substantial, especially for patio doors, with Alitherm, Aluco, Reynaers and other window brands providing a similar aluminium alternative. You will also benefit from substantially better security and
Find out more
Aluminium Flush Casement Windows
Aluminium flush casement windows are now firmly established in the UK market, with plenty of choice for homeowners and the trade. Flush casement windows differ from regular windows because the opening elements sit within the frame rather than overlapping it. The aesthetic advantage is balanced and symmetrical sightlines with a
Find out more
Floor to ceiling windows
For new extensions and property renovations, floor to ceiling windows are unbeatable for filling a room with light, the best possible views and giving a feeling of space. Look at most modern commercial buildings and even the latest trend in home extensions and the floor-to-ceiling aluminium window will be a
Find out more
Pivot opening and specialist windows
Aluminium allows the creation of specialist window designs that would be difficult to achieve using other materials. these windows have become extremely popular in both period and contemporary properties. Parallel opening windows open using multiple hinges to create a projecting window that is equal on all four sides and is
Find out moreAluminium Casement Windows
Casement windows remain the most popular window style in the UK. These outward-opening windows suit both traditional and modern homes and are available with side-hung or top-hung opening opening vents.
Modern aluminium casement windows offer slim sightlines, excellent security and impressive thermal performance. Available in both chamfered and contemporary square-edged profiles, they provide a clean appearance without compromising practicality.
Casement windows work particularly well for replacement projects where homeowners want a familiar window style combined with the benefits of modern aluminium.
Architectural Gable and Apex Windows
One of aluminium’s greatest strengths is its ability to create large window designs.
Apex windows, gable glazing, and bespoke shaped windows can all be manufactured using aluminium systems.
These products are commonly found in barn conversions, contemporary extensions and modern new-build homes where maximising natural light and making the most of glass is important to the design.
Manufacturing and Installation of Aluminium Windows
Aluminium windows begin life as precision-engineered aluminium extrusions manufactured to strict quality standards.
Modern systems incorporate thermal breaks between the inner and outer sections of the frame. These insulating barriers prevent cold transfer through the aluminium and significantly improve energy efficiency.
Despite advances in manufacturing technology, aluminium windows remain largely hand assembled. Profiles are cut, prepared and assembled to order, allowing virtually unlimited combinations of sizes, colours and configurations.
Most aluminium windows are manufactured specifically for each project rather than supplied in standard stock sizes.
Energy Efficiency of Aluminium Windows
Modern aluminium windows are significantly more energy efficient than many people realise.
Thermally broken frames, high-performance glazing and advanced sealing systems allow many products to achieve excellent U-values and Window Energy Ratings.
Most aluminium windows are supplied with high-performance double glazing featuring low-emissivity coatings, warm-edge spacer bars and argon gas filling as standard.
Triple glazing is also available on many systems where even greater thermal performance is required.
Some of the highest-performing products combine aluminium externally with timber internally, creating hybrid systems that offer excellent insulation while retaining the durability of aluminium on the outside.
Colours and Finishes
One of the major advantages of aluminium windows is the huge range of colours and finishes available.
Most systems are powder coated in a durable factory-applied finish available in more than 150 colours. Textured finishes, metallic colours, dual-colour options and realistic wood-effect finishes are also widely available.
For projects requiring an even more durable metallic appearance, anodised finishes provide exceptional longevity and resistance to weathering.
Homeowners in coastal locations should consider marine-insured to provide additional protection against salt-laden air.
Aluminium Window Security
Security performance is excellent across most modern aluminium window systems.
Multi-point locking systems, high-security handles and reinforced hardware provide substantial protection against forced entry.
Many products are tested to recognised security standards including PAS 24 and Secured by Design requirements. New-build projects may also require compliance with Approved Document Q.
The strength of aluminium itself provides an additional advantage, creating robust window frames capable of accommodating advanced locking systems and security glazing.
Glass Options for Aluminium Windows
Glass specification plays a significant role in the performance of aluminium windows.
Modern glazing options can improve thermal performance, reduce external noise, enhance security, increase privacy and minimise solar gain.
Available glass options include:
- Double glazing
- Triple glazing
- Acoustic glass
- Laminated security glass
- Privacy glass
- Solar control glass
- Decorative glass
Choosing the correct glass specification is often just as important as selecting the window system itself.
Aluminium Windows in Conservation Areas and Listed Buildings
Many modern aluminium window systems aren’t always suitable for heritage and conservation applications, although there are exceptions.
Often you will need to provide drawings or physical windows samples for approval before you can proceed. This may allow some aluminium windows to satisfy planning requirements where conventional contemporary systems may not be suitable.
However, every conservation project is different. Before ordering replacement windows, homeowners should always consult their local planning authority or conservation officer.
Working with an experienced installer familiar with conservation projects can significantly improve the likelihood of securing the necessary approvals.
Why Choose Aluminium Windows?
Aluminium windows combine contemporary engineering with exceptional design flexibility.
Their slim sightlines, strength, durability and low maintenance make them suitable for both traditional and modern properties. Combined with excellent security, impressive energy efficiency and virtually unlimited colour options, aluminium windows remain one of the most versatile window products available today.
To learn more, read our Aluminium Windows Buying Guide or explore our reviews of some of the best aluminium window brands currently available in the UK.
Latest Aluminium windows articles
- Alternatives to trickle vents in windows and doors July 16, 2025
- Buying windows and doors online – think twice July 4, 2025
- Planning Permission for Windows: What Homeowners Need to Know March 31, 2025
- Everything you need to know about Cortizo COR 70 Windows January 17, 2025
- Product of the year 2024 December 17, 2024
