Aluminium and uPVC both make secure, energy efficient and long lasting windows and doors. That is the first thing to understand.
This is not the old argument it once was. Modern uPVC windows are vastly better than the plastic windows many people still remember from the 1980s and 1990s. Modern aluminium windows are also very different from the cold, basic aluminium frames fitted to older homes and commercial buildings decades ago.
First written in 2012 when aluminium windows were still less familiar to many homeowners, this guide has been fully updated for 2026. Aluminium awareness is now much higher, uPVC flush and timber look products have improved, aluminium steel look glazing has grown rapidly, and the sustainability discussion has become more complicated than it used to be.
However, the basic question when choosing aluminium or PVCu remains the same and the answer is now more interesting.
Quick answer. Aluminium or uPVC, which is better?
Aluminium is usually better for slim frames, larger panes of glass, contemporary styling, patio doors, colour choice, steel look glazing and long term appearance.
uPVC is usually better for lower budgets, standard replacement windows, timber look styles, woodgrain finishes and sliding sash windows in the period style.
Neither material is automatically right. The wrong choice usually happens when homeowners compare price before they compare the product. For example:
- Frame Style
- Sightlines
- Glass Specification
- Colour
- Hardware
- Trickle Ventilation
- The installer
- What your new windows will look like in ten years.
In 2026 all of these questions now matter. And because both aluminium windows and uPVC are now so up to date, the benefits of both materials are closer than you might think.
Quick Comparison Overview
Here’s a quick overview comparing key performance areas — from cost and lifespan to insulation and maintenance — to help you quickly see how uPVC and aluminium windows differ.
| Feature | UPVC Windows | Aluminium Windows |
| Price Range (per window) | £300 – £950 | £500 – £1200 |
| Energy Efficiency | Excellent (U-value: 1.2-1.4) | Excellent (U-value: 1.0-1.4) |
| Maintenance | Very Low | Low |
| Lifespan | 20-25 years | 30-45 years |
| Aesthetic Style | Traditional/Flush | Modern/Sleek |
| Strength | Good | Excellent |
| Noise Reduction | Excellent | Excellent |
Aluminium vs uPVC windows at a glance
| Requirement | Better choice |
| Lowest purchase price | Usually uPVC |
| Slimmest frames | Aluminium |
| Largest panes of glass | Aluminium |
| Contemporary extensions | Aluminium |
| Standard white replacement windows | uPVC |
| Timber look windows | Usually uPVC or timber |
| Sliding sash windows | Usually uPVC or timber |
| Steel look windows and doors | Aluminium or steel |
| Large patio doors | Aluminium |
| Architect designed homes | Usually aluminium |
| Conservation areas | Usually timber, but check first |
| Long term appearance | Usually aluminium |
| Colour choice | Usually aluminium |
| Woodgrain finishes | Usually uPVC |
| Commercial Doors and Windows | Aluminium |
This table gives the simple answer and the rest of this guide explains why.
Why choosing between aluminium and uPVC still matters
The window industry often makes this subject too simple in their marketing. Some companies lean towards uPVC, so it tells you uPVC is best.
Another company sells aluminium, so it tells you aluminium is best. That does not help you, because if your house suits both, or you are not in the luxury windows and doors bracket, the right answer depends on what you are trying to achieve.
If you are replacing eight white casement windows in a typical house and want a practical, cost effective result, uPVC may be absolutely fine.
If you are building a contemporary extension with large openings, dark frames, slim sightlines and sliding doors, aluminium is usually the better direction.
If you own a period home and want timber style flush casements or sliding sash windows, uPVC or timber are materials that are easier to make in in the timber-alternative style and often may make more sense than aluminium.
For steel look windows and doors, internal screens, large bifold doors, minimal sliding doors or commercial style entrance doors, most professional installers would agree that uPVC is not the right choice. That is why material choice still matters, not because one material is good and the other is bad. Because each material does different things well.
The mistake is not choosing uPVC. The mistake is choosing uPVC when the project clearly needs aluminium. And the reverse is also true.
There are plenty of homes where aluminium adds cost, but not much else.
Are aluminium and uPVC windows similar in performance?
In many important ways, yes. Both aluminium and uPVC windows can provide good security, modern locking systems, double or triple glazing, low emissivity glass, warm edge spacer bars, weather protection, low maintenance finishes, Building Regulations compliance and long product guarantees. Most recognised aluminium and uPVC systems are properly designed, tested and documented.
In our view, both materials when property made and correctly installed, will serve you well. It is poor surveying, poor manufacturing. soor reinforcement. Weak hardware choices. Cheap glass specifications. Bad installation. Wrong product for the opening. Poor advice at the point of sale. The system itself is rarely to blame, given the investment both aluminium and uPVC systems companies make in testing, design and bringing their products to market.
A bad window is rarely a bad system. It is often a bad decision somewhere in the chain between the systems company and your structural opening. That is one of the most important points when comparing aluminium and uPVC. You are not only buying a material. You are buying a finished window, made by a fabricator, surveyed and installed by a company, using a particular glass specification, hardware choice and installation method. That is where good products become bad ones.
Where aluminium windows are better than uPVC
Aluminium is usually better when the design, size, strength and appearance of the glazing matter.
That is why aluminium is widely used on extensions, contemporary homes, architect designed properties, commercial buildings and higher value renovation projects. It gives you design options that uPVC usually cannot match.
Aluminium gives slimmer frames
This remains one of the biggest reasons to choose aluminium. Aluminium is stronger than uPVC, so the frames can usually be made much slimmer while still supporting the glass and hardware properly. The result is more visible glass, cleaner sightlines, less visible frame and better proportions. No uPVC window comes close to the frame sightlines of a slim aluminium window.
The gap has narrowed in some areas because uPVC systems have improved. Liniar Slim Sash windows are a good example. But if you want more glass and less frame, aluminium remains the better material.
This matters most on larger windows, fixed glazing, feature windows, sliding doors and bifold doors. It also matters on smaller windows where bulky frames can reduce the amount of daylight. Presented with both materials side by side, and told honestly what they are looking at, most homeowners prefer the aluminium profile on contemporary projects.
It is therefore essential for windows that you get to see both products together, side by side.
Aluminium is better for larger window and door sizes
Aluminium usually allows larger opening sashes and larger door panels than uPVC. This matters on large fixed windows, wide side hung windows, tall tilt and turn windows, bifold doors, sliding doors, French doors, gable glazing, large screens and contemporary extensions. With uPVC, larger openings often need extra mullions, transoms, sidelights or toplights to keep the product within its limits. That can make the glazing look busier.
Aluminium often allows cleaner designs, larger glass areas and fewer interruptions. This does not mean aluminium has no limits. Every system has maximum sizes and weight restrictions. Wind loading, glass weight, access, handling and installation all matter. But for larger glazing, aluminium is usually the more capable material.
A big opening is usually where the difference stops being theoretical. That is where uPVC starts needing compromises and aluminium starts making sense.
Aluminium is better for contemporary homes and extensions
Aluminium has become the natural choice for modern extensions and contemporary renovation projects. That is partly because of the slimmer frames. It is also because aluminium works well with flat roof extensions, rendered homes, brick and glass designs, large sliding doors, minimal windows, steel look glazing, rooflights, modern colours and flush threshold designs. A modern extension often uses glazing as part of the architecture. In that situation, the window is not just filling a hole in the wall. It is part of the design.
That is where aluminium usually makes more sense. uPVC can fill the opening. Aluminium usually does more for the architecture. There is a difference.
Aluminium is better for patio doors
For patio doors, aluminium is usually the better material.
This is one of the clearest differences between aluminium and uPVC. It applies especially to sliding doors, bifold doors, lift and slide doors, large French doors, open corner doors and slimline patio doors.
uPVC patio doors exist and can work perfectly well on smaller or lower budget projects and more standard 2m x 2m structural opening sizes up to around 3.5m wide.
But when the patio door is the feature of the room, not just the way out to the garden, aluminium is in a different league.
Modern aluminium sliding doors can offer large panels, slim interlocks, smooth running hardware and better design flexibility. uPVC sliding doors are generally more limited in size, appearance and long term feel. They also feel less refined when you open and close the doors.
For bifold doors, aluminium also remains the stronger choice for most serious projects. uPVC bifolds are available, but aluminium bifolds are usually slimmer, stronger, better looking and better suited to regular use.
Patio doors are moving products. They are not just windows with bigger glass. They need good rollers, hinges, locking, adjustment and installation. Aluminium is generally better suited to this type of product.
There is nothing wrong with a smaller uPVC patio door where budget is the priority. There is something wrong with pretending it will deliver the same result as a well specified aluminium one.
Aluminium is better for steel look windows and doors
If you want steel look glazing, aluminium is usually the realistic alternative to genuine steel.
Original steel remains the most authentic product. Nothing in aluminium or uPVC is genuine steel.
But aluminium can create very good steel inspired windows, doors and internal screens when properly designed. uPVC is much less convincing in this area.
The problem is usually frame bulk, corner detailing, bar size and overall appearance. Steel look glazing depends on slim, crisp lines. uPVC normally struggles to deliver that convincingly.
We have yet to see a uPVC steel look window or door that genuinely convinces us.
Steel look products such as Aluco, Alitherm Heritage, Aluk 58BW ST HI and other brands all deliver a better overall slimline steel-inspired aesthetic that uPVC just cannot get to.
Aluminium gives better colour flexibility and long term appearance
Aluminium is powder coated, giving a very wide choice of colours and finishes. Standard colours such as white, black and anthracite grey are widely available. Many systems also offer special RAL colours, textured finishes, metallic finishes, anodised style finishes and dual colour options.
uPVC colour choice has improved through foils and painted finishes. Modern uPVC windows are no longer limited to white. But aluminium still usually gives broader colour flexibility, especially on contemporary projects where exact colour, texture and consistency matter. Aluminium also tends to look better in darker colours because the frame shape and slimmer profiles suit modern finishes particularly well.
Both materials can last well when correctly made and installed. But aluminium usually has the edge for long term appearance. Good powder coated aluminium gives a hard, crisp and consistent finish. It suits dark colours well. It avoids the bulky look that can affect uPVC frames, especially as styles change.
Good uPVC foils have improved. There are now far more colours and finishes available than there used to be. But aluminium still tends to look better long term on contemporary projects. This is not just about material. It is about proportion. And aluminium often has better proportions.
Aluminium is better for commercial doors and high traffic use
Commercial doors should usually be aluminium, steel or another appropriate commercial system. uPVC doors are not normally the right choice for shops, offices, schools, communal entrances, public buildings or high traffic locations.
Aluminium commercial doors are designed for heavier use and can accommodate heavy duty hinges, door closers, access control, panic hardware, electric locking, low thresholds, accessibility requirements, wider door leaves and commercial glass.
You may see uPVC doors fitted to small shops, takeaways or industrial units. That does not make them the correct product. For dwellings, uPVC doors can be fine. For non dwelling and high traffic applications, aluminium is usually the fit-for-purpose product.
In many commercial and public access settings, a uPVC door is unlikely to be the correct specification, particularly where accessibility, durability, traffic levels, threshold design and compliance with standards such as BS 8300 and and Approved Document M need to be considered.
Where uPVC windows are better than aluminium
uPVC still has a very strong place in the UK window market. It is not just the cheaper option. In some areas, uPVC genuinely does things better than aluminium. This is particularly true where the aim is traditional styling, timber like detail, sash windows, woodgrain finishes or lower cost replacement windows.
uPVC is usually cheaper
uPVC is usually cheaper than aluminium. That is not a criticism. For a lot of projects, uPVC is exactly the right product and the price difference for aluminium is not justified by the design requirements.
For example a landlord with an investment propertly that needs new windows and doors can comfortably choose uPVC windows and doors as in this case, it is purely a must-do window replacement. What complicates the comparison is that uPVC varies enormously in price. Basic white uPVC is usually much cheaper than aluminium. Premium flush uPVC, coloured foiled uPVC and timber look uPVC can bring the cost much closer to aluminium.
So when comparing aluminium or PVCu, the question is not just aluminium versus uPVC. It is which aluminium and which uPVC.
As a broad guide, expect aluminium to cost more than equivalent uPVC on a typical residential project. The gap narrows if you are comparing premium uPVC with entry level aluminium. It widens if you are comparing basic white uPVC with a well specified aluminium system.
| Property type | Typical uPVC window cost, fully fitted | Typical aluminium window cost, fully fitted |
|---|---|---|
| Small flat or maisonette | £2,500 – £5,000 | £3,300 – £6,400 |
| Two-bedroom terraced house | £3,500 – £6,500 | £4,500 – £8,500 |
| Three-bedroom semi-detached house | £6,000 – £11,000 | £8,800 – £16,400 |
| Three-bedroom detached house | £7,500 – £13,000 | £9,800 – £17,000 |
| Four-bedroom detached house | £9,800 – £16,000 | £11,800 – £18,000 |
| Larger detached home | £18,000+ | £24,000+ |
These are broad market guide figures, not fixed prices. Regional labour rates, installer overheads, window style, colour, glass specification, access and survey details can all change the final cost significantly.
A cheap uPVC window and a premium aluminium window are not two versions of the same thing. They are two different products. Sometimes that is obvious. Sometimes it is hidden inside the quote. One important point about price is that aluminium and uPVC are rarely quoted like for like. A basic white uPVC casement and a coloured aluminium flush casement are not equivalent products. Neither are a premium timber-look uPVC window and a basic aluminium casement. Before deciding one material is too expensive, make sure the style, colour, glass, hardware, ventilation and installation detail are genuinely comparable.
uPVC is very good for standard replacement windows
If you are replacing older white windows in a typical house, uPVC may be the most practical choice. It is widely available. It is familiar to installers. It performs well. It comes with good guarantees. It is usually cost effective. For many homes, that is enough.
Not every property needs aluminium. A simple replacement window project does not always need a premium material, especially where the design of the house does not benefit from slimmer frames or larger glass sizes. This is where some aluminium companies overstate the case. Aluminium may be better. But that does not mean it is necessary. There are homes where aluminium improves the project. There are also homes where it simply produces a more expensive final invoice.
uPVC is often better for timber look windows
This is one of the strongest areas for uPVC.
Premium uPVC timber look windows can now replicate many details of traditional joinery very well.
Flush casement styling, mechanical joints, timber style corners, deep cills, woodgrain foils, period colours, traditional handles, dummy peg stays, run through sash horns and heritage style glazing bars are all available on the right products.
Aluminium by design and manufacturing methods as well as lack of foiling is rarely as good.
But uPVC still often has the advantage when the goal is to create the look of painted timber. Timber itself is still the most authentic material for this type of work. But where timber is not wanted, premium uPVC can be a better traditional style option than aluminium.
This is where the uPVC market deserves more credit than it sometimes gets. Products such as Evolution Windows, The Residence Collection, Rehau Rio and others demonstrate just how far the sector has moved from the basic plastic casement window. Some of these products are not cheap. Nor should they be judged like cheap windows.
Flush casement windows have become one of the biggest improvements in the uPVC market. A flush casement has an opening sash that sits level within the outer frame, rather than overlapping it like a standard casement window. This gives a cleaner, flatter appearance. uPVC flush casements are now available in a wide range of styles, colours and timber look finishes. Many are aimed directly at homeowners replacing old timber windows or wanting a more traditional appearance.
That said, Aluminium flush casements are now much better than they used to be, and there are several good systems on the market. But for traditional styling, uPVC still has a strong argument. For contemporary flush styling, aluminium may be better. Again, it depends what you want the window to look like.
uPVC is better for sliding sash windows
Another area where uPVC creates the better product. For replacement sliding sash windows, uPVC usually offers more choice than aluminium. There are specialist uPVC sash window products that recreate the look of traditional vertical sliding windows very well. These can include slim meeting rails, run through horns, deep bottom rails, woodgrain finishes and period style hardware.
Aluminium sash windows exist, but the market is more limited, especially where the aim is to replicate traditional timber sash windows. For period homes, conservation areas and architecturally sensitive buildings, genuine timber may still be the best answer.
But between aluminium and uPVC, uPVC often gives the better sash window solution.
This is a good example of why “aluminium is better” is too lazy. Sometimes it is. Here, often it is not. Masterframe, Roseview, Spectus and other brands create uPVC traditional and period sash windows in premium uPVC that are virtually indistinguishable from the real thing.
uPVC has better woodgrain options
If you want a woodgrain finish, uPVC usually gives you more choice. Foiled uPVC windows are available in white woodgrain, cream, Irish oak, rosewood, golden oak, Chartwell Green, black, grey and many other traditional colours and finishes.
Aluminium can also be finished in wood-effect coatings, but these are less common in the residential window market and are not always offered by every manufacturer or installer. For homeowners wanting the look of painted or stained timber without choosing real wood, uPVC usually offers more options. This is one of the few areas where uPVC does not just compete with aluminium. It often beats it.
That said, woodgrain aluminium is available from specialist manufacturers and some aluminium systems companies. The challenge is usually finding an installer and manufacturer willing and able to offer it properly. If you are trying to source wood-effect aluminium windows and doors, get in touch. We can usually point you in the right direction.
Which is warmer, aluminium or uPVC?
Both aluminium and uPVC windows can meet current thermal requirements when correctly specified. uPVC has a natural advantage because plastic is a poor conductor of heat. Aluminium is a metal, so modern aluminium windows use thermal breaks to reduce heat transfer through the frame.
In simple terms, uPVC often has the easier route to strong thermal performance. But that does not mean aluminium windows are cold. Modern thermally broken aluminium windows can achieve very good U values, especially when combined with the right double or triple glazing.
The glass specification usually matters more than homeowners realise. A window is not just a frame. It is frame, glass, spacer bar, gas fill, seals, installation and overall design. If thermal performance is important, ask for the whole window U value, not just the centre pane glass value.
The practical difference for a homeowner choosing between a well specified aluminium window and a well specified uPVC window is usually not as dramatic as the sales literature from either side suggests. Anyone telling you otherwise is probably selling one of them.
Which material is more secure?
Both aluminium and uPVC windows can be secure. Security depends on the product design, locking system, glass, hardware, installation and whether the window or door has been tested to the relevant standard. For new windows and doors, ask about PAS 24 where security performance is important or required. The PAS 24 security test is the same regardless of material. If it passes the test, that is it.
For doors, also look at multi point locking, hinge protection, cylinder quality, laminated glass where appropriate, internal glazing beads and correct installation. Do not assume aluminium is automatically more secure because it is metal. And do not assume uPVC is less secure because it is plastic.
A well specified uPVC window can be more secure than a poorly specified aluminium one. And the security performance of a window is determined by how it performs under standardised test conditions, not by its material alone.
What about sustainability?
Sustainability is more complicated than many salespeople make it sound. Aluminium is highly recyclable and widely recycled. The industry is correct to point this out. What is not always explained is that primary aluminium production is energy intensive. Recycled aluminium is a different story, but not all aluminium used in windows comes from recycled sources.
uPVC is also recycled within the window industry, and modern PVCu systems have improved. The “plastic is bad” argument is simpler than the reality. The environmental impact of a window is not only about the frame material. It also includes how long the window lasts, whether it is replaced early, the glass specification, manufacturing, transport, installation quality, maintenance, recycling at end of life and whether the product is suitable for the property.
A window that lasts longer and is not replaced unnecessarily may be the better environmental choice, whatever the material. So be careful with simple sustainability claims. They are often used as sales tools. Especially by people who would prefer you not to ask the next question.
Which looks better, aluminium or uPVC?
This depends entirely on the property. Aluminium usually looks better on contemporary extensions, modern homes, architect designed projects, homes with large areas of glass, properties using dark window colours, slim framed designs, steel look glazing and large sliding or bifold doors.
uPVC usually looks better on standard replacement window projects, traditional homes where timber style details matter, homes needing sliding sash windows, properties where woodgrain foils suit the style and lower budget projects where aluminium would not add much visually.
The mistake is choosing the material in isolation. A good window should suit the house.
What installers sometimes do not explain
The system is not the whole story. A well designed aluminium or uPVC system can still produce a poor window. Poor fabrication, wrong glass specification, incorrect reinforcement, inadequate survey work, weak hardware, badly positioned trickle vents, unsuitable thresholds and rushed installation can all produce a window or door that disappoints, regardless of what profile it is made from.
The question to ask any installer is not just which system they use. Ask who fabricates the windows. Ask what glass specification they are recommending. Ask why they have chosen that specification. Ask whether trickle vents are visible or concealed. Ask what handles and hinges are included. Ask whether the colour is standard, special order or foiled. Ask what happens if the survey differs from the quotation. Ask whether the drawings and specifications are clear before you sign. If you also want a PAS 24 window you need to ask for it. Do not assume it comes as standard, it does not.
The quotation mistake homeowners often make
A homeowner receives one uPVC quote and one aluminium quote. The aluminium quote is higher. So they assume they are comparing materials.
Often, they are not. They may be comparing basic uPVC against premium aluminium. White frames against coloured frames. Standard casements against flush casements. Different glass specifications. Different trickle vent details. Different handle ranges. Different security specifications. Different installation standards. Different levels of survey detail. Different guarantees. Different companies.
That is not a material comparison. That is a quotation comparison. Before deciding aluminium is too expensive, or uPVC is better value, make sure you know what is included. A proper comparison needs like for like information. It sounds obvious. It is amazing how rarely it happens. You can get in touch with for help and advice on quotations you have had for both material types.
When aluminium is worth the extra money
Aluminium is usually worth the extra money when you want slimmer frames, larger glass sizes, sliding or bifold doors, dark coloured frames, steel look glazing, a more premium appearance or a contemporary extension where the glazing is a major part of the design.
It is also worth considering when you are working with an architect, creating a forever home or trying to avoid a design compromise that you will see every day.
In these situations, the extra cost is not just for the material. It is for the design freedom aluminium gives you. That is a perfectly valid reason to spend more.
When uPVC is the more sensible choice
uPVC is often the more sensible choice when budget is the main priority, you are replacing standard windows, you want white or woodgrain frames, you want timber look flush casements, you want sliding sash windows or the property does not need slim frames.
It is also sensible when the project is practical rather than design led.
There is nothing wrong with choosing uPVC for the right project. The problem is choosing it when the design really needs aluminium. Or choosing aluminium when the house simply does not need it.
What about total cost of ownership?
It is tempting to compare aluminium and uPVC only by the initial quotation. That is where uPVC usually looks the stronger option.
But the real cost of a window is not only what you pay on day one. It is also how long the product lasts, how it looks after ten or fifteen years, whether the hardware remains serviceable, whether the colour still suits the house, whether the product is right for the opening and whether you end up replacing it earlier than expected.
This is where aluminium can justify its higher price on the right project. A well specified aluminium window or door may cost more at the start, but can offer slimmer frames, better proportions, larger glass sizes, stronger patio doors and a longer-lasting appearance. On a contemporary extension, architect-designed home or higher value renovation, that extra cost may be worthwhile because the glazing forms part of the design.
uPVC can still offer excellent total value. For standard replacement windows, rental properties, lower budget projects and homes where traditional styling or woodgrain finishes matter, a good uPVC window may be the more sensible long-term decision. Spending more on aluminium does not automatically make the project better.
Be careful with claims that new windows will “pay for themselves” through energy savings. Better windows can reduce heat loss and improve comfort, especially when replacing old single glazing or failed double glazing. But energy savings depend on the whole property, not just the frame material. Roof insulation, wall insulation, heating habits, glass specification, installation quality and ventilation all matter.
The better question is not which material has the lowest lifetime cost on paper. It is which product is least likely to disappoint you over the time you own the home.
Aluminium vs PVCu. The final tip from the Door and Window Experts Website
Aluminium is usually the better material when the windows and doors are part of the design of the home. uPVC is often the better material when the windows are mainly a practical replacement. That is the simplest way to look at it.
Architects, designers and homeowners working on contemporary extensions, large glazing, slim frames and higher value renovations usually choose aluminium. Homeowners replacing standard windows on a tighter budget often choose uPVC. In many cases, that is still the right decision.
The mistake is not choosing uPVC or aluminium. The mistake is choosing either one for the wrong reason. If you want slim frames, large glass, contemporary styling, better patio doors, steel look glazing or a more premium appearance, aluminium is usually the right direction.
If you want cost effective replacement windows, traditional styling, timber look details, sliding sash windows or woodgrain finishes, uPVC may be the better choice. Neither material is automatically right. Neither material is automatically wrong.
The important thing is to compare the right products, the right specifications and the right installers. A good uPVC window will usually serve a home better than a badly specified aluminium one. A good aluminium window will usually deliver a result uPVC cannot match when design, size and sightlines matter.
Frequently asked questions about aluminium and uPVC windows
Are aluminium windows better than uPVC?
Aluminium windows are better for slim frames, larger glass sizes, contemporary designs, patio doors, steel look glazing and colour choice. uPVC windows are usually better for lower budgets, standard replacement windows, timber look designs and sliding sash windows. The better material depends on the home and the type of window or door required.
Are aluminium windows more expensive than uPVC?
Yes, aluminium windows usually cost more than uPVC. However, the price gap depends on the products being compared. Basic white uPVC is usually much cheaper than aluminium. Premium flush, timber look or coloured uPVC windows can be much closer in price.
Are aluminium windows colder than uPVC?
Modern aluminium windows are not cold when properly designed and specified. They use thermal breaks to reduce heat transfer through the frame. uPVC has a natural thermal advantage as a material, but both aluminium and uPVC windows can meet current energy efficiency requirements with the correct glass and frame specification.
Which lasts longer, aluminium or uPVC?
Both materials can last for many years. Aluminium is often seen as the longer lasting and more premium material because it is strong, stable and powder coated. uPVC can also last well, especially from good manufacturers. The quality of the product, installation and maintenance matter as much as the material.
Which is better for modern homes?
Aluminium is usually better for modern homes, contemporary extensions and architect designed projects. It gives slimmer frames, larger glass sizes, stronger patio doors and a cleaner appearance.
Which is better for traditional homes?
uPVC, timber or timber alternative products are often better for traditional homes where the aim is to replicate original timber windows. Premium uPVC flush casements and sliding sash windows can provide more convincing period details than many aluminium windows.
Which is better for sliding doors?
Aluminium is usually better for sliding doors. It allows larger panels, slimmer frames, better hardware options and a more contemporary appearance. uPVC sliding doors are more limited and usually suit smaller or lower budget openings.
Which is better for bifold doors?
Aluminium is usually better for bifold doors because it is stronger, slimmer and better suited to regular use. uPVC bifold doors are available, but they rarely offer the same appearance, size capability or long term feel.
Is uPVC still worth buying?
Yes. uPVC is still worth buying when it suits the property and budget. It remains a good choice for many standard replacement window projects, especially where cost, low maintenance and traditional styling matter.
Is aluminium worth the extra money?
Aluminium is worth the extra money when the project benefits from slimmer frames, larger glass, modern styling, better patio doors or a more premium appearance. It may not be necessary for a straightforward replacement window project where uPVC will do the job well.
Can I mix aluminium and uPVC in the same house?
Yes, but it needs care. Many homeowners use uPVC windows on the original house and aluminium doors or glazing on a new extension. This can work well if the colour, style and proportions are considered properly.
Which material is more secure?
Both aluminium and uPVC windows can be secure when correctly specified. Look for tested products, good locking systems, suitable glass, internal beading where appropriate and proper installation. The material alone does not determine security.
Which material is better for colour?
Aluminium usually gives better colour flexibility because it is powder coated and available in a wide range of colours and finishes. uPVC colour options have improved greatly, especially with foils, but aluminium still has the advantage for contemporary colour choice.
Which material is better for steel look windows?
Aluminium or genuine steel are the better choices for steel look windows and doors. uPVC rarely creates a convincing steel look because the frames and bars are usually too bulky.
Should I choose aluminium or uPVC?
Choose aluminium if design, sightlines, large glass, patio doors or contemporary styling matter most. Choose uPVC if budget, standard replacement windows, timber look styling or sash windows matter most. The best choice depends on the property and the result you want.
About this article
Written by Nick Dardalis, founder of Door and Window Experts and a fenestration industry professional since 1989. Door and Window Experts is the UK’s independent review and advice resource for windows and doors. We explain the products, the differences and the details homeowners are rarely shown properly.
