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Which is Better uPVC or PVC Windows?
Table of Contents
Quick Answer
uPVC (unplasticised polyvinyl chloride) and PVC are essentially the same polymer, but uPVC does not contain plasticisers, making it rigid, durable, and suitable for window frames. The terms are often used interchangeably in the UK window industry. Modern uPVC windows offer excellent thermal insulation (U-values from 1.0 W/m2K), multi-point security locking, 20-30 year lifespans, and over 30 colour options with minimal maintenance.
Key Takeaways
- UPVC windows typically last between 20 and 30 years with minimal maintenance, and many quality installations exceed this lifespan.
- UPVC windows are fully recyclable and can be recycled up to 10 times without losing their structural integrity.
- PVC windows, due to their flexible and less durable nature.
- When combined with double or triple glazing, uPVC windows can achieve A+ energy ratings under the Window Energy Rating scheme.
- They help reduce heat loss significantly, potentially saving homeowners £100 to £200 per year on heating bills.
When choosing new windows for your home, you may have come across both uPVC and PVC windows.
While these terms are often used interchangeably, there are significant differences between them that could impact your decision.
In this article, we'll explore the key differences, benefits, and drawbacks ofuPVCandPVCwindows to help you decide which option is better for your home.
1. What is the Difference Between uPVC and PVC?
PVC (Polyvinyl Chloride)
PVCis a synthetic plastic polymer used in a variety of products, from plumbing pipes to window frames. It is highly versatile but not very suitable for window frames in its standard form due to its lack of durability and flexibility.
uPVC (Unplasticised Polyvinyl Chloride)
uPVCis a more rigid version ofPVC. The term "unplasticised" means that no plasticisers (chemical additives that increase flexibility) have been added.uPVCis more durable, weather-resistant, and commonly used for window frames because it retains its shape, strength, and insulating properties over time.
2. Key Differences Between uPVC and PVC Windows
3. Advantages of uPVC Windows
uPVC windowsare a popular choice for modern homes, and for good reasons:
a. Durability
One of the biggest advantages ofuPVC windowsoverPVCis their superior durability.uPVCdoes not warp, crack, or discolour, even in extreme weather conditions. This makes them ideal for homes in areas with harsh climates.
b. Low Maintenance
uPVC windowsare virtually maintenance-free. UnlikePVC, they don’t require repainting, and they are resistant to corrosion and rot. CleaninguPVC windowsonly requires a quick wipe-down with a cloth, making them a low-maintenance choice.
c. Energy Efficiency
uPVC windowsoffer excellent insulation, keeping your home warm in the winter and cool in the summer. This helps to reduce energy consumption and can lower your energy bills.
For more information on the energy efficiency of uPVC, you can read our detailed guide onhow upgrading your windows can save you energy and money.
4. Drawbacks of PVC Windows
PVC windows, although less common for window frames, may appear cheaper upfront, but they come with several disadvantages:
a. Prone to Warping
PVCis more flexible thanuPVC, which means it can warp or lose shape over time, especially in high temperatures or harsh weather conditions. This can lead to issues with window functionality and longevity.
b. Less Energy Efficient
PVC windowsare not as good at insulating homes asuPVCwindows, meaning your home could lose heat more quickly, resulting in higher energy bills.
c. Higher Maintenance
PVC windowsrequire more maintenance over time, as they are more prone to wear and tear, discolouration, and the need for repainting.
5. Which is Better: uPVC or PVC Windows?
For most homeowners,uPVC windowsare the superior choice due to their durability, energy efficiency, and low maintenance. WhilePVCwindows may be cheaper, their reduced lifespan and higher maintenance costs often make them a less attractive option in the long run.
Conclusion: Should You Choose uPVC or PVC?
In conclusion,uPVC windowsoffer significant benefits overPVC windowsfor long-term performance and value. If you’re looking for windows that are energy-efficient, durable, and low maintenance,uPVCis the way to go. WhilePVCmay seem like a budget-friendly option upfront, the long-term costs associated with maintenance and potential repairs can makeuPVCthe better investment.
Ready to upgrade to uPVC windows?Visit ouruPVC windows pagefor more information, orcontact usto get a quote.
Frequently Asked Questions
uPVC stands for Unplasticised Polyvinyl Chloride. The key difference is that uPVC does not contain plasticisers, which are chemical additives that make standard PVC flexible and soft. This absence of plasticisers makes uPVC rigid, durable, and weather-resistant, ideal properties for window frames. Standard PVC is more flexible and prone to warping over time, making it less suitable for windows. In the UK window industry, uPVC is the standard material used by reputable manufacturers and installers.
uPVC windows typically last between 20 and 30 years with minimal maintenance, and many quality installations exceed this lifespan. PVC windows, due to their flexible and less durable nature, tend to have a shorter lifespan of around 10 to 15 years before showing signs of warping, discolouration, or structural weakness. The rigid composition of uPVC makes it far more resistant to weathering, UV exposure, and temperature fluctuations experienced in the UK climate.
Yes, uPVC windows are highly energy efficient. Modern uPVC frames feature multi-chambered profiles that trap air, providing excellent thermal insulation. When combined with double or triple glazing, uPVC windows can achieve A+ energy ratings under the Window Energy Rating scheme used in the UK. They help reduce heat loss significantly, potentially saving homeowners £100 to £200 per year on heating bills. uPVC frames also form tight seals that prevent draughts, further improving energy performance.
uPVC windows require very little maintenance, which is one of their biggest advantages. They do not need painting, varnishing, or sealing like timber windows. To keep them looking clean, simply wipe down the frames with warm soapy water and a soft cloth a few times a year. The hinges and locking mechanisms should be lubricated annually with a silicone-based spray. Unlike PVC, uPVC resists discolouration and does not yellow over time when exposed to sunlight, maintaining their appearance for decades.
Yes, uPVC windows are fully recyclable and can be recycled up to 10 times without losing their structural integrity. In the UK, organisations such as Recovinyl and various recycling schemes ensure that old uPVC frames are processed and reused rather than sent to landfill. When your uPVC windows reach the end of their life, a reputable installer can arrange for the old frames to be collected and recycled. This makes uPVC an increasingly sustainable choice for environmentally conscious homeowners.
The cost of uPVC windows in the UK typically ranges from £400 to £600 per window for standard casement styles, including installation. Sash-style uPVC windows cost more, usually between £600 and £900 per window. The total cost depends on factors such as window size, glazing type, colour finish, and the complexity of installation. For a typical three-bedroom house, a full set of uPVC replacement windows usually costs between £4,000 and £7,000. uPVC remains the most cost-effective window frame material available.
Modern uPVC windows are highly secure when fitted with appropriate locking hardware. Most quality uPVC windows come with multi-point locking systems, reinforced steel within the frame, and internal beading that prevents the glass from being removed from outside. Many uPVC window products are available with Secured by Design accreditation, a UK police-backed scheme that certifies enhanced security performance. For maximum protection, opt for uPVC windows with laminated or toughened glass and key-locking handles.