In Summary

• Aluminium is a popular material for window frames thanks to its strength, sleek appearance, and excellent corrosion resistance.
• Aluminium frames help improve thermal efficiency, reducing energy bills.
• Aluminium windows are available in a wide range of colours, styles, and finishes for the perfect bespoke match.
• Aluminium is durable, low maintenance, and weather resistant, lasting up to 45 years with minimal signs of wear.
• At Unique Glazing, we offer bespoke aluminium casement and flush sash windows with A++ energy ratings and fast lead times.

Why is Aluminium Used for Window Frames?

Aluminium is one of the most widely used materials in modern window design, with most reputable installers across the country offering the product.

Its popularity largely stems from a useful selection of modern-day benefits, including its ability to invite natural light into the home, strong thermal efficiency, and durability.

In this blog, we’ll take a look at aluminium in detail, examining what makes it such a useful window frame material, and exploring the options available to South East homeowners.

Aluminium frames are slim, meaning more natural light can shine into your living space.

What is Aluminium?

Aluminium is a lightweight metal derived primarily from bauxite ore (a type of rock). It’s the third most abundant element on Earth and is renowned for its versatility, strength-to-weight ratio, and resistance to corrosion.

Used in everything from aerospace and spacecrafts to MPA-certified shopfronts and residential buildings, aluminium has long been appreciated for its durability and performance under pressure. In the world of home improvements, aluminium is processed into aluminium alloy profiles for added strength and shaped into window and door frames using specialist machinery.

What Are the Benefits of Aluminium as a Window Frame Material?

Exceptional Strength & Durability

• One of the greatest benefits of aluminium windows is their sheer strength.
• Aluminium offers incredible support for large glazing panes, all without the bulkiness of timber frames or UPVC window frames.
• The strength of aluminium allows for slim, stylish frames that increase natural light and maximise views.
• With minimal signs of wear, aluminium frames can last up to 45 years

Aluminium windows have a reputation for being low maintenance.

Outstanding Energy Efficiency

Thanks to polyamide thermal break technology, aluminium windows are now more energy efficient than ever before.

• The thermal break acts as a barrier, stopping heat from escaping through the frame
• Helps maintain a comfortable indoor temperature year-round
• Our aluminium windows offer U-values as low as 1.1W/m²K
• All designs come with double or triple glazing options for superior thermal performance

This translates into reduced reliance on central heating, lower energy bills, and a more sustainable home overall.

Low Maintenance Living

Unlike timber or steel frames, aluminium is virtually maintenance-free. It doesn’t warp, rot, or rust, and requires nothing more than an occasional wipe down with warm, soapy water.

• Excellent corrosion resistance makes it ideal for exposed locations
• The powder coating used on our aluminium profiles helps maintain colour vibrancy for decades
• No repainting required

Sleek, Modern Aesthetics

Modern aluminium windows are all about minimalist design. With ultraslim sightlines, they deliver a clean and contemporary look that suits modern and traditional homes alike.

• Available in a range of colours and finishes, including woodgrain effects
• Popular choices include anthracite grey, jet black, and metallics
• Perfect for creating a ‘more glass, less frame’ look

Sustainability & Eco Credentials

Aluminium is one of the most sustainable building materials available:

• 100% recyclable with no loss of quality
• All of our aluminium profiles are sustainably sourced
• Lower carbon footprint over time compared to PVC or timber

If you’re conscious about your impact on the environment, aluminium frames are an excellent choice.

A full set of aluminium windows on a heritage home

What Window Styles Are Available in Aluminium?

At Unique Glazing, we offer two popular aluminium window styles that each offer their own unique appeal.

Aluminium Casement Windows

Casement windows are hinged at the side and open outward. Thanks to the strength of aluminium, our casement frames can support wide glazing areas, allowing for more light and less frame.

• Ideal for modern and traditional homes
• Architectural chamfered frames for a refined finish
• Easy to operate, secure, and energy-efficient

Coloured aluminium casements are particularly popular in contemporary home makeovers, offering sharp lines and panoramic views with minimal fuss.

Aluminium Flush Sash Windows

Flush sash windows sit flush within the frame, creating a streamlined appearance that mirrors traditional timber sash windows – with all the performance benefits of aluminium.

• Available in a wide range of colours and woodgrain finishes
• Suitable for heritage-style properties as well as modern homes
• Fitted with multi-point locking for increased security

Aluminium Windows from Unique Glazing

We design and manufacture our aluminium windows in-house, giving us complete control over quality and customisation. That means we can offer:

• Bespoke aluminium windows made to your exact specifications
• Full range of hardware options, including handles, locks, and hinges
• Matching door frames for seamless home styling
• Products backed by a comprehensive 10-year insurance-backed guarantee

Who Are Unique Glazing?

We’re a family-run business with over 20 years of experience designing and installing high-quality windows, doors, conservatories, and orangeries across the South East. Based in our innovative 6,000 sq ft factory, we manufacture the majority of our products ourselves, including all of our aluminium frames.

Why Choose Us?

• FENSA Approved Installers and Liniar Approved Fabricators
• ICO registered for customer data protection
• Trusted by 1,000s of satisfied customers across London, Slough, Surrey, Oxfordshire, and Berkshire
• A customer-first approach with quick, no-obligation consultations, e-sign contracts, and dedicated aftersales support

To find out more or get a free quote, give us a call on 0800 193 2425 or email us at sales@uniqueglazing.co.uk.

FAQs

Do aluminium windows reduce energy bills?

Yes! Thanks to the thermal break and double/triple glazing, aluminium windows offer impressive thermal efficiency and can help reduce heating costs significantly.

Will aluminium frames rust over time?

No – aluminium is naturally resistant to corrosion, and all our products are powder coated for excellent corrosion resistance and colour longevity.

Are there any disadvantages of aluminium windows?

Aluminium may have a higher initial cost than uPVC, but it offers greater durability, lower maintenance, and a longer lifespan – making it a better long-term investment.

Can aluminium windows be coloured?

Absolutely – we offer a wide range of colours, from bold brights to classic neutrals, plus woodgrain and metallic effects for a truly bespoke finish.