At a glance, here is a breakdown of the average expected lifespans for different window materials:
- uPVC Windows: Typically last 30-35 years for high-quality uPVC that's properly installed and maintained.
- Aluminium Windows: Provided they are good quality with a durable finish, Aluminium windows should last for over 25 years.
- Wooden Windows: High-quality, properly treated timber with a durable finish can last decades. Just look at the some of the original Victorian windows still around today. You need to keep on top of maintenance though, otherwise they might not last anywhere near as long.
The problem with these figures though, is that there is so much that can affect the average lifespan of a window. The other thing to mention is that when we say how long windows last, we're really talking about how long they last working at their best. Many homes have windows in them that have been there for over 40 years, but that doesn't mean those windows are working at their best.
What Factors Affect a Window’s Lifespan?
There are a lot of things that can affect the average life span of a window. As you can see above, each material will also last a different length of time.
Material
We've already touched on material, but let's look at the properties of each material and what affects their lifespan.
- Aluminium: Aluminium has been used for window frames for a long time. It doesn't rust, it's very strong and it doesn't get damaged easily. Most aluminium window frames are finished with durable weather resistant paint that is also easy to clean. This means, on the surface, there's not a lot you need to do to Aluminium windows to keep them looking good and working well.
That said, the right finish does play a big part in the lifespan of aluminium windows.
- Wood: Timber is a great window frame material, but how long it lasts depends on a lot of things. Wood needs to be properly treated before it is used, otherwise it could warp or rot more easily. The right wood needs to be used, as hardwood can be better than softwood in some cases.
The correct finish is also crucial for the lifespan of a timber window. This means paint that allows the wood to breathe. You also need to repaint wooden window frames regularly to prolong their life and protect them from damp and rot.
Most of the time though, if the correct wood is used with the correct finish, a wooden window could last many decades.
- uPVC (unplasticised polyvinyl chloride): uPVC doesn't warp or rust and is designed to be weather resistant. Modern uPVC is also multichambered, making it very strong and hard to damage. Overall, uPVC is the easiest material to maintain of the three, making it a very cost-effective investment.
Our high-quality white uPVC Casement and Tilt & Turn windows are certified to last over 35 years.
Installation Quality
The quality of installation is just as important as the windows themselves. Even the best quality windows can quickly develop problems if they aren’t measured, aligned, or sealed correctly. If there are gaps around a window it can lead to all sorts of issues with your house, not just the windows.
Poor window installation can lead to:
- Cold air coming in around the frame
- Increased street noise
- Water getting in around the frame
- Water damage to window frames
- Water damage to plaster, brickwork and insulation
- Mould and damp developing
We supply quality made to measure windows, fitted by our skilled install teams. We are committed to the highest standards of workmanship and installation. Contact us today for a free, no obligation quote.
Maintenance
If you want your windows to last a long time, its important to keep up with maintenance. Different materials obviously need different levels of maintenance.
uPVC and Aluminium require less maintenance than timber because their finishes are permanent and don't need topping up. Wash them with warm soapy water, avoiding harsh chemicals, to keep them looking good. Take care to oil moving parts like hinges around once a year.
Timber windows need that bit more maintenance to keep them working and looking good. As with uPVc and aluminium, keep them clean by washing with soapy water and no harsh chemicals. Their finish is not permanent and you'll probably need to repaint every 10 years. If paint gets chipped or damaged, it is a good idea to remedy that quickly to avoid damp and rot.
Weather Conditions
Different weather conditions can affect windows in ways you might not realise. The position of your house, the local climate and the position of the windows can have a big impact.
Windows that get more wind and rain than usual will likely need more regular maintenance. Checking seals around frames, checking inside the frames for debris and keeping up with more regular cleaning needs are key to helping windows last longer. Regular checks like this mean you can spot anything that might need fixing before it becomes a nastier problem.
If your windows get a lot of sunshine on a south-facing wall, this could have an impact too. Older timber windows, and some very old uPVC windows, can expand in the heat and if they've not been cared for. This can lead to warping, which can leave gaps around the frame, letting air and moisture in.
Coastal Areas
If you live near the coast, salt air can reduce the lifespan of your windows. Salt-laden air carries microscopic crystals that settle on surfaces, corroding metal components, degrading seals, and accelerating overall wear.
It speeds up oxidation, the chemical reaction between metal and oxygen that leads to rust, meaning parts like hinges and locks are more vulnerable to damage. Salt can also break down paints, and sealants, and may cause etching, which is a gradual wearing of the glass surface that leaves it looking cloudy or marked.
To minimise these effects, regular rinsing helps remove salt buildup and protective coatings can add an extra layer of defence. Choosing materials more suited to coastal conditions, such as powder-coated aluminium or uPVC can also improve durability.
Our uPVC and aluminium windows are designed to withstand all the climate of the UK can throw at them.
How long does double glazing last?
Different to how long a window can last is how long the actual double glazed windows or triple glazed windows themselves last. The sealed glazed units, housed in uPVC, aluminium or timber frames, can have their own lifespan.
A common problem on older double and triple glazing is when the windows have 'blown'. This is where the airtight seal between the glass panes breaks, meaning air and moisture get between them. This causes condensation between the panes, or misting.
There is no hard and fast rule as to how long these seals should last, but most manufacturers have a warranty. Our sealed double glazed units have a 15-year guarantee, or a 10-year guarantee for Classic uPVC Sash. We're confident they should last for that long and longer, but in the unlikely event the seal does fail in that time, you're covered.
When should you replace your windows?
Recognising when your windows need replacing can help avoid more significant issues down the road. Here are some key signs it may be time to upgrade;
- Draughts and cold spots
- Condensation or misting between panes
- Difficulty opening, closing, or locking windows
- Visible damage, like rotting wood or cracked frames
- High energy bills due to poor window efficiency
- Outdoor noise infiltrating the home
- Water leaks, such as water stains on walls or window sills
Interested in new uPVC windows?
Whether you’re replacing old windows that are starting to show signs of wear or just wanting to give your home’s exterior a quick refresh, choosing the right option is key. The perfect windows should suit your needs and give you confidence they’ll stand the test of time.
uPVC windows are a popular choice because they look great, require minimal upkeep, and last for decades, all at an affordable price point. Safestyle offers a wide range of options, including uPVC Casement Windows, Bay Windows, Sash Windows, French Windows, and Tilt and Turn Windows, available in a variety of colours and finishes to complement any property.
Explore Safestyle’s uPVC window range to compare styles, find the perfect fit for your home, and request a free, no obligation quote.
Window Lifespan FAQs
If you’re unsure how long your windows should last or when to replace them, you’re not alone. Below, we’ve answered some of the most common questions homeowners have about window lifespan, performance, and when it’s time to consider an upgrade.
In most cases, yes. Modern windows are designed using advanced materials and improved manufacturing techniques, making them more durable and energy-efficient than older alternatives. uPVC and aluminium options, in particular, offer longer lifespans and better performance compared to traditional window designs.
The type of windows that last the longest is really dependent on what they're made of and how well you care for them. When we talk about how long windows last, this is how long they last working at their best. Wooden windows can last many decades with proper care, but they need the most regular maintenance of any material. Aluminium windows are very strong and durable, as are uPVC, so they can work at their best for well over 20 years, especially with regular maintenance. Aside from materials, moving parts and seals often need replacing down the line. They can be replaced easily, especially in warranty, but the older the windows get the harder it is to replace them.
To get rid of misting in double glazing, the best solution is usually to replace the sealed glass unit. If your windows are still under guarantee, it is best to contact your manufacturer to get this fixed. There are plenty of DIY fixes you can find on the internet, but most of these would void any warranty. If your windows are not in warranty, then there are questionable DIY fixes online, or some companies do offer services to fix the issue.