Double Glazed Aluminium Windows and Costs

Aluminium windows are lightweight but very strong, with a long lifespan.

A new aluminium window will cost from £565 and this includes installation.

By installing new aluminium windows, you can reduce your energy bills by up to £175 a year.

What's in This Guide to Aluminium Window Frames?

Why Get Aluminium Windows?

Aluminium windows are another form of double glazing that'll keep your home warm, secure and insulated. Aluminium window frames are strong and allow more light into your home because of their 'slimmer' style.

Another benefit is that aluminium windows are customisable to your home and tastes, with a range of up to 200 different colours from the RAL guide (a colour system used in paints and varnishes).

In terms of its impact on the planet, aluminium is an environmentally-friendly material that can be recycled. But because of the metal's hard-wearing and durable qualities, double glazed aluminium windows should have an extremely long lifespan and won't need replacing.

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Cost of Aluminium Windows

Aluminium is currently one of the most expensive types of double glazing. The average cost for 4 aluminium double glazed windows is between £2,445 and £2,835. This estimation takes into account that your home will probably require a couple of different sized windows with varying numbers of openings.

The table below shows examples of average costs according to the number of aluminium windows required:

Type of aluminium window
Average cost for 4 windows
Average cost for 9 windows
Average cost for 15 windows
Aluminium casement
£2,445 - £2, 835
£5,470 - £6,215
£9,355 - £10,130

Based on the smallest aluminium window frame costing around £565, the cost per m2 (metre squared) is roughly £376.

Do Grey Aluminium Windows Cost More?

Aluminium windows with a grey finish are found on more and more homes in the UK, particularly new builds, because they offer a sleeker modern look compared to uPVC. Grey aluminium window frames will usually cost more than white, for example, and you can expect to pay around 10% more for a specialised RAL colour. However, the more windows you have installed, the better bargaining power you have to negotiate the price down.

You might also be interested in:

How much does double glazing cost?

How Much Would Aluminium Windows Cost You?

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Are Aluminium Windows Suitable For Your Home?

Aluminium double glazing is particularly suitable if you live in a modern home and want a stylish, contemporary window design. They're also a good choice if you need to replace windows with unusual shapes or want to let more light into your home.

Double glazed aluminium windows are less suitable if you live in a traditional, older home. For example, anything pre-1930 might not suit the modern look that these windows provide.

If you live in a listed building, it’s often illegal to replace original windows with modern double glazing without planning permission, meaning aluminium window frames may not be for you. In this case, secondary glazing could be a good option if you want a better insulated home.

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What Styles Are Aluminium Windows Available In?

UK double glazing companies like Anglian and Everest produce aluminium windows in casement style. Their aluminium frames can be painted in a range of different colours to suit your property and you can have different colours for the interior and exterior of the frame.

Although typically, aluminium windows suit a more modern home, Everest has created a range which includes internal Georgian bars, leaded and coloured glass designs. This might be a good option for those in period homes that want a more traditional looking solution.

What Are Powder Coated Aluminium Windows?

Powder coated aluminium window frames offer a premium 'just painted' finish, but without the risk of fading in the sunshine or flaking with age.

The powder coated paint is essentially baked onto the frames - making it extremely durable - and you can still choose from up to 200 RAL colours, including the ever-popular grey aluminium windows.

Powder coated aluminium windows will cost slightly more than standard ones but because they require little to no maintenance, it's a worthwhile investment.

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Aluminium Casement Windows

aluminium casement window

A casement window is attached to its frame by hinges and normally at the side, opening inwards. These frames can be made in aluminium and are a popular choice out of the range of aluminium double glazing you can install.

Aluminium casement windows are normally opened with levers or handles and you can increase their security with a multi-point steel locking systems. These windows are also beaded internally to ensure burglars cannot remove glass from the outside.

Although people see the benefits of aluminium casement windows in terms of style, security and energy efficiency, many still buy uPVC casement windows. uPVC is typically cheaper than aluminium and also has similar energy and security benefits as well as being durable.

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Aluminium Window Manufacturers

The table below shows leading nationwide installers who offer aluminium windows. Local companies in your area will also offer aluminium windows too so you should always compare between local and nationwide installers.

Aluminium windows
Wooden windows
uPVC windows
Crystal Windows
Manchester Window Factory
Weather Seal

Find out more about:

The best double glazing companies

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What Are the Advantages and Disadvantages?

Advantages of aluminium windows

Aluminium windows boast many advantages, particularly in their style and design. They are preferred by architects designing modern homes given their slim frames, access to light and flexibility in colour choice. They can also be moulded to replace windows with unusual shapes.

There are environmental and energy efficiency advantages to aluminium window frames made from recyclable materials and providing good insulation for your home. They also reduce noise pollution from outside.

Functionally, aluminium windows are strong and resilient. They are weather resistant, durable and are said to last longer than uPVC windows. Double glazed aluminium windows also have a reputation for being highly secure.

Disadvantages of aluminium windows

Aluminium windows have some disadvantages compared to uPVC or timber windows when it comes to insulation. As aluminium is good at conducting heat it means it doesn’t insulate the home or hold heat in as well as other materials. This can cause condensation or frost appearing inside the windows in cold temperatures. They are also at a higher risk of corrosion, particularly if the window includes steel parts.

Aluminium window frames are not ideal for older properties as their modern style may look out of place with the rest of the building. Equally, for listed buildings and those in a conservation area, you will not be able to install double glazing without planning permission.

Compared to uPVC windows, aluminium windows tend to come in at a higher price point.

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Aluminium Window Warranties

When you are shopping around for your new aluminium windows, it’s important to ask each supplier what type of warranty they offer and if it’s included it in the quote.

There are different types of warranty to be aware of and their lengths will vary across supplier so check with each exactly what you are getting.

Most leading double glazing companies offer the following guarantees:

Whole window guarantee

This is a typical manufacturer’s warranty for the window. The standard length of a guarantee for aluminium windows is anywhere between 10 - 25 years.

Sealed unit guarantee

This guarantee protects the sealed gap in the window and means if you spot certain issues including fog or condensation, the company should repair or replace the panes for you. Warranty lengths vary between companies, from 10 years to a lifetime guarantee.

Some companies also offer other guarantees, it’s worth asking your window supplier whether they provide guarantees for the following:

Discolouration guarantee

Offered against the colour of the frames and sometimes the aluminium itself. Length of terms vary, for example between 10 - 25 years.

Window frame guarantee

Similar to the above guarantee, though this applies more to the aluminium frames themselves. Length varies between 10 - 25 years.

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What Are the Alternatives to Aluminium Windows?

In addition to aluminium, the most common options for double glazing window materials are uPVC or timber.

uPVC (or PVCu) is a popular choice for homeowners given that it is typically cheaper than aluminium or timber windows. uPVC double glazed windows require very little maintenance, are easy to keep clean and are energy efficient.

A disadvantage of these windows is that uPVC is a weaker material and therefore requires slightly thicker frames to hold the glass pane in place.

Timber windows are popular due to their more traditional and classic look. They are a good choice for period properties as they reflect the older style of historic design. Wood is also an effective natural insulator, keeping the warmth in during winter.

Timber is typically the most expensive material choice and also requires more maintenance than aluminium and uPVC over its lifetime.

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