Six Key Differences Between uPVC and Aluminium

When it comes to replacement windows and doors, uPVC is not the only choice available. There are hardwood frames, which are often used in more traditional properties, especially in conservation areas. Also, over the past few years, we have seen increasing demand for aluminium.

But, when it comes to choosing new replacement windows or doors, what are the key differences between aluminium and uPVC you should consider?


Let’s get the big one out of the way first. Aluminium is much more costly to manufacture than uPVC, which makes for a more expensive window product. Since replacement double glazing became a popular home improvement product back in the 1970s, uPVC has led the way and been developed for mass production. This has kept prices relatively static, if not lower over time if you take inflation into consideration.

Meanwhile, the raw cost of Aluminium production has always made it a much more expensive option for double glazing windows and door frames. Subsequently, there has not been that much choice available.

However, price only goes so far and discerning homeowners are always looking for new and improved options when investing in their properties. Aluminium, arguably, has surpassed uPVC in the benefits and choices it offers.

Time will tell, but as aluminium becomes more popular, there should be more product options available in the market, which means lower prices should follow.


Although uPVC windows have a long life, the frames may potentially degrade over many years. Aluminium, however, is a much more robust compound and with proper care will stand the test of time without compromise.

Cleaner Profile

One of the ongoing complaints with uPVC, especially with more period properties, is the thickness of the profile (the frame). Because aluminium is a much stronger material, the frames can be made much thinner. This allows more light into the property and leaves the window looking cleaner with a higher ratio of glass to frame than uPVC can offer.


As architecture design styles continue to change, aluminium window has become the architects choice, simply because the profile offers much more flexibility. Homeowners are also following suit as the frames can be sprayed any colour and curved to fit a more contemporary building style.


Staying with period properties, aluminium offers a choice of colours to match the style of your home which far surpasses that of uPVC.

While traditional uPVC window ranges have set colours, aluminium can be sprayed to match any RAL colour. This means your frames can be any colour you choose for a truly personalised home.

Consistent Frames all year round, from year to year.

Wooden framed windows often swell, warp or rot over time. uPVC can be prone to expansion and contraction with heat. But, aluminium is chemically much more robust and stable.

Where this really stands out is large panels of moving glass, such as french doors or Bi-Fold doors. The aluminium frames withstand the elements to remain consistent from year to year, whatever the weather.


The great thing about aluminium is that it offers you, the homeowner, a greater choice when it comes to windows and doors. Whatever your key considerations are when you look to improve your home, the chances are uPVC or aluminium will stand out as offering exactly what you need.

If you would like more information, why not get in touch with one of our team, who can give you more details about the wide range of windows and doors available in both uPVC and aluminium?

Infrared image of energy efficient windows