Aluminium Casement Windows: Designs, Cost, Pros and Cons
A double-glazed aluminium casement window typically costs £700 to £4,500 fitted, per window, depending on size, brand and installation; small standard sizes sit at the bottom.
Aluminium casement windows are among the most widely adopted window designs in the UK. This is mainly because they come with an expansive range of customisation options that builders and property owners can take advantage of.
However, this very feature can also become a point of confusion when it comes to choosing the perfect style that ticks all of the boxes for you.
Key takeaways
• The frame, glass, and hardware of aluminium casement windows can be customized to match the design preferences of property owners.
• Aluminium casement windows generally cost between £372 to £961 and double glazed units costs an average of £800. Installing 7 windows in a semi-detached home costs around £4,200 to £4,500. Prices may vary depending on the window specifications.
• In terms of affordability, aluminium casement windows (£740 – £1,150) comes second to uPVC (£370 – £960), while timber (£1,150 – £1,830) is the most expensive among the three materials.
• This type of window is durable, long lasting, aesthetically appealing, versatile, environment friendly, and requires little maintenance.
• On the downside, it can be prone to corrosion, has a risk for condensation, and has low thermal efficiency but innovative solutions are currently available to fix these problems.
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What is an Aluminium Casement Window?
Casement windows are single or multi-paneled windows that are typically hinged on the side, top, or bottom. Handles can be added at different positions to open the windows outwards, allowing for varying degrees of ventilation and natural lighting to enter. Moreover, the panels are shut in a tight seal to make the windows highly energy efficient.
They can be built using wood, uPVC, or aluminium to suit the aesthetics of different buildings, but aluminium casement windows are considered the most lightweight and durable out of the three.
Customization Options
Whether you are going for a contemporary touch or craving a more minimalist feel, you can personalize your aluminium casement windows by simply configuring the different design elements below.
Window and Frame
| Colour | Everest, UK’s leading provider in window construction, offers white, battleship grey, charcoal grey, brown, black and dual-coloured (black and white) frames. Slide and Fold, a trusted supplier of premium windows and doors, also offer bespoke frames showcasing RAL colours. |
| Finish | gloss, matt, satin, matte (outside)/gloss (inside), or dual RAL finish |
| Frame Type | slim (33 mm) or 47.5 mm |
| Cills | none, 85 mm, 150 mm, or 190 mm |
| Sash | none, square, or supplier-custom |
| Trickle Vent | yes/no |
| Thermally Broken | yes/no |
| Handle | different designs and colours to match the frame |
Glass
| Energy Efficiency Rating | A, B, or solar control glass |
| Glazing Type | double or triple glazing |
| Glass Type | • clear • frosted, obscure, decorative • toughened, laminated, noise reducing |
| Design | none, square lead, diamond lead, Georgian bar, or astragal bars |
Aluminium Casement Windows Cost in 2024
The cost of aluminium casement windows in 2024 varies according to the number of windows to be installed, their sizes, and chosen functional features. The average cost of one aluminium casement window can be anywhere between £372 to £961.
Below is additional data on estimated prices according to size, home and glazing types, and in comparison to other construction materials.
Cost by size
| Window Size (w x h in mm) | Price Range |
|---|---|
| 600 x 900 | £540 – £680 |
| 900 x 1200 | £650 – £800 |
| 1200 x 1200 | £770 – £1000 |
| 1100 x 1075 | £1,100 – £1,340 |
| 1300 x 1275 | £1,110 – £1,360 |
| 1400 x 1375 | £1,350 – £1,650 |
Cost by type of home
| Home Type | Number of Windows | Price Range |
|---|---|---|
| Flat | 4 | £2,400 – £2,800 |
| Terraced | 5 | £2,800 – £3,050 |
| Semi-detached | 7 | £4,200 – £4,500 |
| Semi-detached | 9 | £5,500 – £6,200 |
| Detached | 12 | £7,850 – £8,650 |
| Detached | 15 | £9,350 – £10,100 |
Cost by glazing type
| Glazing Type | Average Price per Window |
|---|---|
| Double Glazing | £800 |
| Triple Glazing | £840 |
Cost of Aluminium vs uPVC vs Timber Casement Windows
| Number of Windows | uPVC | Aluminium | Timber |
|---|---|---|---|
| 1 | £370 – £960 | £740 – £1,150 | £1,150 – £1,830 |
| 2 | £740 – £1,920 | £1,490 – £2,290 | £2,290 – £3,660 |
| 3 | £1,120 – £2,880 | £2,230 – £3,440 | £3,440 – £5,490 |
| 4 | £1,490 – £3,840 | £2,980 – £4,590 | £4,590 – £7,320 |
| 5 | £1,860 – £4,810 | £3,720 – £5,740 | £5,740 – £9,150 |
| 6 | £2,230 – £5,770 | £4,460 – £6,880 | £6,880 – £10,970 |
Pros of Aluminium Casement Windows
Apart from its design flexibility, aluminium casement windows also offer the following benefits:
• Durability. Metals are strong and durable, making aluminium casement windows highly resistant to weathering. According to Nottingham Windows Company, they are about 3.5 times tougher than uPVC windows.
• Long Lifespan. Owing to their durability, aluminium casement windows have a long lifespan. On average, they can last for 30 to 40 years. This is 10 to 15 years more than uPVC casement windows.
• Lightweight. Aluminium is one of the most lightweight metals on the planet. It is almost 3 times lighter than iron, making it a popular material of choice for window manufacturers.
• Visual Appeal. Known for their sleek and contemporary designs, aluminium casement windows can be structured to fit the aesthetics of various modern architectures. However, the addition of window leads and classic bars can also give properties a timeless flair.
• Versatility. Aluminium casement windows can elevate the visual appeal of different establishment types including residential, commercial, and institutional buildings.
• Low and easy maintenance. Unlike timber or wood casement windows that require regular sanding, varnishing, or repainting, aluminium casement can be maintained with a simple swipe of a damp cloth. This is great if you are a busy property owner who prefers hassle-free window maintenance.
• Environment – friendly. Aluminium is 100% recyclable and can be recycled endlessly without affecting its quality. With aluminium casement windows, you can reduce your carbon footprint while supporting sustainable construction practices.
Cons of Aluminium Casement Windows
Before choosing aluminium for your casement window frames, it is important to be aware of the potential drawbacks that come with this material as well.
• Prone to corrosion. Aluminium can react with oxygen and cause aluminium oxide deposits on the surface of the metal. Several suppliers offer anodisation services to protect their aluminium frames against corrosion-related damages.
• Condensation risk. Moisture can get trapped inside aluminium frames and lead to the growth of moulds and corrosion. This can be addressed by adding thermal breaks, trickle vents, and getting high-quality double glazing.
• Low Thermal Efficiency. Aluminium conducts heat very quickly which means that it doesn’t keep the heat as well as other materials. Manufacturers fix this by placing thermal breaks between the frame and sash to improve the window’s insulation. Most aluminium window units are already pre-fitted with thermal breaks.
Leading Window Suppliers in the UK
If this article has got you sold on aluminium casement windows, the next big question is, where can you get one?
Well, here is a round-up of 5 major window suppliers in the UK and the features they offer.
| 1. Everest |  | • the company’s slimmest aluminium frames • modern colour range, two-tone, no RAL colour • strong, durable, and secure windows • double glazing option • 45-year lifespan • 10-year insurance backed guarantee |
| 2. Anglian Home Improvements |  | • slim frames • over 200 colours available, two-tone • energy saving, robust, resilient, and secure • double glazing option (1.4 W/m²K U-value) • lasts for 20-30+ years • 10-year insurance backed guarantee |
| 3. Slide and Fold |  | • slim frames • RAL colours, two-tone • thermally efficient, secure, competitive price • double glazing option (1.5W/m²K; A rated) • 5-year guarantee |
| 4. Evander |  | • strong and resilient frames • different colours and finishes available • modern designs, thermally efficient • 10-year window guarantee • 1-year guarantee on repairs and workmanship • approved by insurance companies |
| 5. Just Value Doors |  | • slimline aluminium windows • standard and powder-coated RAL colours • modern designs, thermally efficient • high security espagnolette locking system • 10-year insurance backed guarantee |
To request a quote for double glazed aluminium casement windows, you may visit the individual sites of these suppliers, or you can save time and let Ecopreneurist find the best deals for you. It is completely free and requires zero obligation on your end.
Are aluminium casement windows more expensive than uPVC windows?
Generally, yes. A casement window made of aluminium costs between £740 – £1,150 while one uPVC casement window ranges from £370 – £960. However, aluminium casement windows are considered more durable and long lasting.
Which has a longer lifespan, aluminium or uPVC casement windows?
Aluminium casement windows. Their average lifespan is around 30 to 40 years while uPVC casement windows last for about 20 to 25 years.
What is the lead time for aluminium casement windows in the UK?
UK suppliers have different lead times for their aluminium casement windows but the range is between 2 to 8 weeks, depending on the window specifications
Are aluminium windows not suitable in coastal areas?
Aluminium windows near the sea are prone to salt air corrosion because the air attracts water. You can opt for powder-coated aluminium, a marine-grade material that is resilient in coastal environments.
Are aluminium casement windows eco-friendly?
Yes. Aluminium is 100% recyclable and can be recycled perpetually without affecting its properties. When fortified with high quality double glazing, aluminium casement windows become one of the most energy efficient and sustainable window types.
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