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Aluminium or uPVC: which is right for you?
Aluminium or uPVC is one of the questions we hear most often in our Guildford showroom. Both are excellent choices when they are well made and properly fitted, and neither is right for every home. The honest answer depends on the look you want, how long you plan to stay and the budget you are working with.
We have been fitting windows across Surrey and Berkshire since 1972, so we have seen how both materials perform year after year. If you are weighing up aluminium windows for your Surrey home, here is a straightforward comparison of the things that matter most. No pushy sales, just straight advice.
Looks and sightlines
Aluminium wins on slim frames and clean, modern lines. Because the material is so strong, aluminium frames can be much narrower than uPVC while still holding large panes of glass. That means more glass, more daylight and clearer views, which is why aluminium suits contemporary homes, extensions and wide openings so well.
uPVC frames are chunkier by necessity, as the material needs more bulk to stay rigid. That is not always a drawback. On a cottage, a Victorian terrace or a 1930s semi, a classic white uPVC window often looks right at home, and sculptured or flush sash styles can echo period details nicely.
Colour is where the gap has narrowed. Aluminium is powder coated in almost any colour, with anthracite grey, black and white the most popular choices. uPVC now comes in a wide range of foiled colours and woodgrain finishes too, so you are no longer limited to white.
Thermal performance
Both materials can keep your home warm and comfortable, and both are made to meet current Building Regulations for replacement windows.
uPVC is a natural insulator. Its frames are built with several internal chambers that trap air and slow heat loss, which is why it has a long reputation for energy efficiency at a sensible price.
Aluminium conducts heat on its own, so modern systems use a thermal break, an insulating barrier built into the frame that stops warmth escaping. Older aluminium windows earned a reputation for feeling cold and gathering condensation, but today’s thermally broken frames perform very well.
In practice, the glass makes the biggest difference to how warm a window feels. When you compare quotes, ask about the energy rating and U value of the whole window rather than judging the frame material alone.
Security
A well made window in either material can be very secure. What really matters is the locking hardware, the strength of the frame and the quality of the installation.
Aluminium is inherently strong and rigid, which makes frames hard to force or flex. Good uPVC windows are reinforced with steel or aluminium inside the frame to give them similar strength.
Whichever you choose, look for multi point locking, internally beaded glazing so panes cannot be removed from outside, and windows tested to PAS 24, the recognised standard for enhanced security. Make sure your installer is FENSA registered too, so the work is certified and meets Building Regulations.
Maintenance
Neither material needs painting, sanding or treating, which is a big part of why both have replaced timber in so many homes.
uPVC needs an occasional wipe with warm soapy water, plus a little lubricant on the hinges and locks once a year. White uPVC can lose some of its brightness over many years, especially on sunny, south facing walls.
Aluminium’s powder coated finish is very hard wearing and resists fading. A gentle wash a couple of times a year keeps it looking sharp, particularly if your home is near a busy road or under trees.
Lifespan
This is where aluminium has a clear advantage. A quality aluminium window can last 40 years or more, and the frame stays straight and strong throughout. A good uPVC window typically lasts around 25 to 35 years, depending on the quality of the profile and how exposed it is to the weather.
Aluminium is also fully recyclable without losing quality, which matters if sustainability is high on your list. uPVC can be recycled too, and many manufacturers now use recycled material in new frames.
Budget
uPVC is usually the more affordable option and offers excellent value for money. If you are replacing every window in the house, the saving can be significant.
Aluminium costs more upfront, but you are paying for slimmer frames, a premium finish and a longer life. Spread over the years you will own them, the difference can be smaller than it first looks.
The fairest way to compare is with real quotes for your own home, as the size, style and number of windows all change the figures.
So, which should you choose?
| Aluminium | uPVC | |
|---|---|---|
| Looks | Slim frames, more glass, modern feel | Classic, suits traditional homes |
| Thermal performance | Very good with a thermal break | Very good, naturally insulating |
| Security | Inherently strong | Strong when reinforced |
| Maintenance | Very low | Very low |
| Lifespan | 40 years or more | Around 25 to 35 years |
| Budget | Higher upfront cost | More affordable |
Choose aluminium if you want slim sightlines, larger panes, a contemporary look or the longest possible life. Choose uPVC if you want great value, a classic look and strong all round performance.
There is no wrong answer, only the right one for your home. Some homeowners even mix the two, with aluminium at the back of the house and uPVC at the front.
Still deciding? Visit our Guildford showroom to compare aluminium and uPVC windows side by side, or call 01932 344 415 for a free quote.
