Slimline Aluminium Windows with a Thermally Broken Frame
Aluminium is stronger than uPVC, so the frame can be far slimmer for the same size of window. That means more glass, more daylight and cleaner lines, which is why aluminium suits modern extensions, contemporary homes and wide openings. Our aluminium windows are made to measure and crafted from high quality components to ensure superior durability and performance.
A thermal break, a strip of insulating material between the inner and outer parts of the frame, stops the metal carrying cold into your home. That is how modern aluminium windows reach A rated energy performance with double or triple glazing. Every window is fitted by our FENSA certified team with a full product and installation guarantee, across Hayes, Hillingdon, Uxbridge, Southall and Yeading.
Aluminium windows
- Ultra slim sightlines let in more daylight and give a sleek, modern look
- Powder coated in contemporary colours including anthracite grey and black
- Aluminium will not rust, warp or rot, so it never needs painting or sealing
- Strong enough for large panes and wide openings without bulky frames
Performance and security
- A polyamide thermal break stops heat escaping through the metal frame
- Up to A++ rated double and triple glazing keeps heat in and bills down
- Multipoint locking and toughened glass keep every opening secure
- FENSA certified fitting and a full guarantee give proof of compliance and lasting cover
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Why Aluminium Frames Can Be So Slim
The main difference between aluminium and uPVC is not the colour range, it is strength. Aluminium is far stronger than uPVC for the same thickness, so the frame around each pane can be much narrower while still holding large glass securely. The result is a higher proportion of glass to frame, more visible garden and sky, and the clean, minimal lines that suit modern homes.
- More glass and less frame, so rooms feel brighter and bigger
- Clean, square edged profiles for a contemporary look
- Strong enough to carry large panes and wide openings without extra bars or bulky frames
- Lightweight and easy to handle, which keeps installation precise
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What Is a Thermal Break and Why Does It Matter?
Metal conducts heat, so a plain aluminium frame would carry cold straight through to the inside of your home. That reputation for cold frames and condensation belongs to older aluminium windows. Modern frames solve it with a thermal break, a strip of non conductive polyamide set between the inner and outer parts of the frame, which physically interrupts the flow of heat.
- A polyamide thermal break separates the inside and outside of the frame
- Warm edge spacer bars at the edge of the glass reduce heat loss and condensation
- Sealed double or triple glazed units add further insulation
- Good thermally broken aluminium systems can reach U-values of around 1.0 to 1.4 W/m²K depending on the glazing
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Aluminium Window Styles
Aluminium suits almost every window style, so you can choose what works best in each room.
- Casement windows, side hung or top hung, in slim frames for a modern look
- Flush casement aluminium windows with a square edged, level finish, see also our uPVC flush casement windows
- Tilt and turn aluminium windows that open inward for easy cleaning, see also our tilt and turn windows
- Fixed picture windows and slim mid bars to frame a view
- Steel look styling with fine glazing bars for a Crittall style finish
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Colours and Finishes
Because aluminium is chosen for how it looks, the finish matters as much as the frame.
- Powder coated in any RAL colour, giving a far wider choice than a standard uPVC range
- Anthracite grey and black are the most popular choices for modern frontages and extensions
- Dual colour options with one shade outside and another inside to match your interior
- Textured and anodised finishes available for a more architectural look
- A powder coated finish resists fading and chipping, so the colour stays true for years
05 / Windows
Aluminium vs uPVC Windows: Which Should You Choose?
For most homes uPVC is the best value, and we will say so honestly. Aluminium earns its higher price where light, slim frames and a long life matter most.
| Aluminium | uPVC | |
|---|---|---|
| Frame width | Very slim | Wider |
| Typical cost fitted | Roughly £550 to £1,300 per casement | Roughly £400 to £1,000 per casement |
| Lifespan | Often 30 to 45 years | Commonly 20 to 35 years |
| Colours | Any RAL colour, dual colour, textured, anodised | Standard colours and woodgrain |
| Best suited to | Extensions, contemporary homes, large openings | Most homes and period style replacements |
Price figures are independent UK guide ranges, not a Eurothermal quote. FMB's 2026 guide puts a standard aluminium casement at roughly £700 to £870 for common sizes, against roughly £525 to £670 in uPVC.
06 / Windows
Where Aluminium Windows Work Best
- Rear extensions and kitchen diners, where large panes and slim frames maximise light and garden views
- Contemporary homes and new builds that want a sleek look throughout
- Wide openings and picture windows that need a strong, slim frame
- A mixed approach on period homes, with aluminium at the back and a traditional uPVC sash or flush casement window to the front, which is common across Hayes
- Matching aluminium bi-fold and sliding doors, so your windows and doors share the same frame colour and profile
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Built to Last: Care and Lifespan
Aluminium is naturally corrosion resistant, which makes it a genuinely low maintenance material.
- Will not rust, warp or rot, even after years of damp British winters
- Powder coating resists fading and chipping far longer than painted timber
- No repainting, sanding or resealing needed, simply wipe the frames clean
- Check and lubricate hinges and handles once a year to keep them running smoothly
- Aluminium is fully recyclable, so it is a responsible choice at the end of its long life
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Aluminium Window Installers Near You in Hayes
Eurothermal Glazing is based at 25 Chaucer Avenue, Hayes, Middlesex, UB4 0AP. We make and fit aluminium windows across Hayes, from Hayes Town, Botwell, Hayes End and Wood End to Yeading, and throughout West London, including:
- Hayes UB3 and UB4
- Southall UB1
- Norwood Green UB2
- Northolt UB5
- Greenford UB6
- West Drayton UB7
- Uxbridge UB8
- Denham UB9
How It Works
From your first enquiry to installation and aftercare, we keep each stage clear and straightforward.
About Us-
1
Tell Us About Your Project
Tell us what you want to replace or install and where the property is located.
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2
Technical Survey
Where required, we measure the openings and assess the practical requirements of your property.
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3
Confirm Your Specification
Choose the frame material, glazing, opening style, colours, finishes and hardware.
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4
Made to Measure
Your selected windows or doors are produced to the agreed dimensions and specification.
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5
Installation & Aftercare
Our team completes the installation, checks the finished system and remains available for aftercare.
Frequently Asked Questions
Ask Us a QuestionWhat is a thermal break in an aluminium window?
A thermal break is a strip of insulating polyamide fitted between the inner and outer sections of an aluminium frame. Aluminium conducts heat, so the break stops cold passing through the frame. It is what lets modern aluminium windows reach A rated energy efficiency and avoids the cold, condensation prone frames that older aluminium windows had.
How much do aluminium windows cost?
Independent UK price guides put a fitted aluminium casement at roughly £550 to £1,300, depending on size and finish, which is around 30 to 40 percent more than the same window in uPVC. FMB's 2026 guide gives roughly £700 to £870 for common casement sizes. These are national guide figures, not a Eurothermal quote, so book a free survey for an exact price.
Are aluminium windows better than uPVC?
Neither is better for every home. Aluminium offers slimmer frames, more glass, more colour choice and a longer life, while uPVC is cheaper and better suited to replicating traditional timber styles. Many homeowners choose aluminium for a rear extension and uPVC for the front of the house.
How long do aluminium windows last?
Aluminium windows commonly last 30 to 45 years, longer than uPVC at 20 to 35 years. Because the frame does not rust or warp, the main upkeep is cleaning and an occasional check of the hinges and seals.
What colours are available for aluminium windows?
Aluminium windows are powder coated and available in a wide range of RAL colours, with anthracite grey and black the most popular for modern homes. Dual colour options give a different shade inside and out, and textured or anodised finishes are also possible.
Can aluminium windows have a steel look like Crittall windows?
Yes, slim aluminium frames with fine glazing bars can recreate the look of traditional steel windows without the rust and maintenance of real steel. This steel look style is popular on rear extensions and contemporary homes.
Do aluminium windows rust or need maintenance?
No, aluminium does not rust and a powder coated finish resists fading and chipping. Wipe the frames clean and check the hinges and handles once a year. They never need painting.
Can aluminium windows be triple glazed?
Yes, aluminium windows can be fitted with double or triple glazing. Triple glazing improves warmth and sound reduction and suits homes near busy roads, railways or flight paths, which is a reality in parts of Hayes, Southall and Hillingdon.
Can I fit aluminium windows in a period home or conservation area?
Often at the back of the house, but conservation areas and listed buildings restrict materials, and councils usually expect timber or very close matches on a street frontage. Check with your local planning authority before ordering, and we will tell you honestly if aluminium is unlikely to be approved.