Differences Between uPVC and Aluminium Windows

To Summarise

• uPVC windows are the more affordable choice; they’re often selected by those on a budget who also prioritise energy efficiency.
• Aluminium windows look very modern, have a longer lifespan, and greater design flexibility.
• Aluminium is stronger and more sustainable, perfect for large windows or minimalist frames that let in more light.
• AGS offers both uPVC and aluminium windows, each fully customisable to suit your home’s style and performance needs.

uPVC and aluminium are two of the UK’s most popular window frame materials, with both offering unique benefits.

Truth be told, the best option for your home often depends on your unique preferences, budget, and priorities – we would recommend both uPVC and aluminium for homes in Essex and London!

We’ll delve into why this is below, and hopefully help you to make an informed decision by looking at various factors to figure out which frame material is right for you.

What is uPVC?

uPVC stands for unplasticised polyvinyl chloride.

It’s a rigid, weather-resistant plastic commonly used in window frames, doors, and pipes throughout Europe.

Because it’s easy to mass-produce, uPVC is often the most affordable window frame material on the market. You’ll also find it used in cladding, fascia boards, and even conservatories.

What is Aluminium?

Aluminium is a lightweight, strong metal used widely in construction, aerospace, and transportation.

In the window world, aluminium is valued for its slim profiles, long lifespan, and modern aesthetic, perfect for lighting up spaces with natural light.

Unlike some metals, aluminium windows are powder-coated or anodised for excellent resistance to corrosion, making them well-suited to bipolar weather and coastal areas.

Comparing uPVC vs Aluminium Windows

Here’s a quick summary looking at how uPVC and aluminium windows compare across several key attributes.

Feature	uPVC Windows	Aluminium Windows
Material	Unplasticised polyvinyl chloride (rigid plastic).	Lightweight, powder-coated metal.
Appearance	Larger frame profiles, woodgrain effects available.	Slim frames, sleek modern appearance, wide colour range.
Durability	Good – more hard wearing against light scratches and stains.	Excellent – highly resistant to corrosion and warping.
Maintenance	Very low maintenance. General cleaning and lubrication of moving parts every six months is recommended.	Low maintenance – General cleaning and lubrication of moving parts every six months is recommended.
Thermal Performance	Excellent thermal insulation (standard A-rated). It’s slightly stronger than aluminium in this regard.	Excellent, especially with thermal breaks.
Weather Resistance	Excellent.	Excellent – Ideal for coastal and extreme conditions due to marine grade powder coating available in a range of colours.
Longevity	30 years plus.	30 years plus.
Price	Lower upfront cost.	Higher initial price tag.
Sustainability	Recyclable but less eco-efficient to manufacture.	Highly recyclable, lower carbon footprint over lifetime.
Best For	Ideal for a wide range of projects, especially homes looking to maintain a traditional timber appearance, our Flush Sash profiles offer the perfect solution.	Modern designs, large windows, premium projects.

The Benefits of uPVC Windows

Low Maintenance and Long-Lasting

uPVC exploded onto the market as a low-maintenance alternative to time-consuming timber frames. Just like aluminium, you only need to clean them with a damp cloth to keep them looking good. Expected to last for around 30 years.

Excellent Thermal Efficiency

Standard double glazing combined with insulated uPVC frames offers A-rated thermal performance, helping reduce heating bills as you’ll reduce heating bills as the property will have greater heat retention.

Versatile Styling

Available in a wide choice of colours and finishes, including woodgrain effects like golden oak and rosewood, uPVC windows can complement any home style.

Cost-Effective

uPVC frames are usually the cheapest window option, making them ideal for budget renovations or rental properties.

The Benefits of Aluminium Windows

Modern Aesthetic

Slim sightlines and sleek frames give aluminium windows a contemporary look, perfect for larger windows and open-plan designs.

Durability and Strength

Thanks to its inherent strength, aluminium is perfect for larger glazing units and high-traffic areas. It’s also non-corrosive, making it the best choice for coastal homes.

Energy Efficiency

Modern aluminium windows include thermal break technology and high-performance glazing, offering excellent thermal insulation properties that rival uPVC.

Sustainability

Aluminium is 100% recyclable and has one of the lowest life-cycle impacts of any window material, making it a great eco-conscious choice.

Verdict: Which Is Better?

In a direct comparison of uPVC and aluminium windows, the decision often comes down to budget vs design.

• Aluminium windows are potentially longer lasting, allow more natural light, and are a sustainable solution – especially suited to modern properties, commercial buildings, and harsh or coastal environments.
• uPVC windows still offer fantastic performance at a lower price, with minimal maintenance and wide design flexibility.

At AGS, we supply both aluminium and uPVC windows – helping you choose the right frame for your home and budget.

Choose Aluminium If…

• You want a modern look with slim frames
• You live in a coastal or exposed area with harsh weather
• You prefer stronger materials with a potentially longer lifespan
• You’re installing larger windows or specific window types (e.g. tilt & turn)
• Sustainability and recycling are a priority for you

Choose uPVC If…

• You’re working with a limited budget
• You want excellent thermal efficiency at a great price
• You prefer a traditional look with woodgrain finishes
• You want a low-maintenance option
• Your windows are of a standard size and type

Aluminium Windows from AGS

At Advanced Glazing Systems, we offer bespoke aluminium windows that deliver style and performance in equal measure. Available in casement, bay, and tilt & turn designs, our aluminium windows are made to measure, fully Part L compliant, and PAS 24:2022 security approved.

Features at a glance:

• Fully customisable in every RAL colour
• Slim profiles and wide glazing areas
• Excellent resistance to corrosion, rust, and warping
• Discreet head cover designed to conceal trickle vents for a cleaner finish.
• A perfect fit for both residential and commercial buildings

uPVC Windows from AGS

Our uPVC windows are an affordable, energy-efficient, and stylish option. Choose from casement, tilt & turn, bay, or sliding sash styles – all available in a wide palette of colours and finishes.

Key highlights:

• A-rated energy efficiency
• Low maintenance with long-lasting performance
• Noise-reducing double glazing
• Customisable designs with modern or heritage styles
• Popular colours include: anthracite grey, chartwell green, golden oak, and many more

FAQs

Which window material is better for coastal areas?

Aluminium is the clear winner here. Its excellent resistance to rust, corrosion, and warping makes it the ideal choice for extreme weather conditions and sea air.

Do aluminium windows get cold or cause heat transfer?

Not anymore. Modern aluminium profiles mitigate heat transfer and offer excellent thermal insulation comparable to uPVC.

Is uPVC suitable for larger window types?

Standard uPVC windows work best for smaller and medium sizes. For larger windows, aluminium frames offer better structural strength.

Are aluminium windows worth the higher price tag?

Yes – aluminium windows can offer greater longevity, low maintenance requirements, and a more premium aesthetic, giving you better value over time.

Can I get aluminium windows in traditional styles?

Absolutely. While known for their modern appeal, aluminium windows from AGS can be styled with heritage hardware like monkey tail or teardrop handles for a classic look.

How do uPVC windows hold up in extreme weather?

uPVC performs very well in the UK’s varied weather, but over time, intense sun or frost may lead to slight warping or fading – aluminium fares much better in extreme conditions.

Who Are AGS?

Advanced Glazing Systems (AGS) is a trusted name in window and door solutions, offering expert installations and premium products across the region. With years of experience in the industry, we pride ourselves on helping homeowners make informed choices with honest advice, custom options, and high-performance products.

We supply and install:

• Aluminium and uPVC windows and doors in every style
• Fully accredited products, including PAS 24 and Part L compliance
• Custom colours, finishes, and hardware
• Expert advice tailored to your property

Contact AGS today to speak to our friendly team, book a consultation, or visit our showroom. Let’s find the perfect windows for your home.