When it comes to replacing your windows, the choice between aluminium and uPVC can feel overwhelming. Both are popular across the UK and offer unique advantages — but which is right for your home? In this guide, we’ll explore the differences in style, cost, performance, and durability, helping you make an informed decision.
Aluminium vs. uPVC: Which Windows Are Right for Your Home? | The Fenestration Network
WHAT’S THE DIFFERENCE BETWEEN ALUMINIUM AND UPVC WINDOWS?

Aluminium and uPVC are the two most common window materials in the UK.

• Aluminium windows are known for their slim, sleek frames and long lifespan. Modern designs include thermal breaks and advanced glazing, making them far more energy-efficient than older models.
• uPVC windows are more budget-friendly, naturally insulating, and require little maintenance. They’re available in a wide range of finishes but are generally bulkier than aluminium.

Choosing between the two often comes down to balancing aesthetic preferences, budget, and long-term goals.
Aluminium vs. uPVC: Which Windows Are Right for Your Home? | The Fenestration Network
ADVANTAGES OF ALUMINIUM WINDOWS

1. Sleek Modern Design – Slim frames mean more glass and more natural light, giving a contemporary, minimalist look.
2. Durability – Aluminium doesn’t warp, rot, or rust, lasting 30–40 years with proper care.
3. Energy Efficiency – With modern thermal breaks and double/triple glazing, aluminium achieves impressively low U-values.
4. Customisation – Available in hundreds of RAL colours, including dual-colour frames.
5. Sustainability – Aluminium is 100% recyclable, making it a greener choice.
   Aluminium vs. uPVC: Which Windows Are Right for Your Home? | The Fenestration Network
   ADVANTAGES OF UPVC WINDOWS
6. Affordability – Typically 20–40% cheaper than aluminium.
7. Energy Efficiency – Naturally insulating, especially with modern glazing.
8. Low Maintenance – No painting or sealing required; just occasional cleaning.
9. Wide Availability – Offered by most UK installers, making them easy to source.
   Aluminium vs. uPVC: Which Windows Are Right for Your Home? | The Fenestration Network
   COMPARING ALUMINIUM AND UPVC SIDE BY SIDE Feature Aluminium uPVC Cost Higher upfront cost Lower upfront cost

Style | Slim, modern, contemporary | Chunkier frames, more traditional

Energy Efficiency | Excellent with modern thermal breaks | Very good, naturally insulating

Lifespan | 30–40 years | 20–25 years

Maintenance | Minimal | Minimal, but may discolour

Recyclability | 100% recyclable | Less sustainable
Aluminium vs. uPVC: Which Windows Are Right for Your Home? | The Fenestration Network
FAQS

Q: Are aluminium windows colder than uPVC?
A: Not anymore. Older aluminium windows had poor insulation, but modern systems use thermal breaks and advanced glazing, making them as efficient — or more efficient — than uPVC.

Q: Do uPVC windows discolour over time?
A: Yes, especially in south-facing homes with strong sunlight. Higher-quality uPVC and darker colours resist this better.

Q: Which is better for resale value?
A: Aluminium tends to appeal to buyers looking for contemporary style and durability, which can boost property value.

Q: What if I live in a conservation area?
A: Many councils prefer timber or timber-look windows. However, some aluminium systems are designed to replicate heritage styles and may be approved.
Aluminium vs. uPVC: Which Windows Are Right for Your Home? | The Fenestration Network
REAL-LIFE EXAMPLES

• A homeowner in Manchester upgraded to slimline aluminium windows in a Victorian terrace, gaining 25% more natural light and cutting energy bills by 18%.
• A couple in Kent chose uPVC for their semi-detached home, saving £4,000 compared to aluminium while still improving energy ratings.
  Aluminium vs. uPVC: Which Windows Are Right for Your Home? | The Fenestration Network
  WHICH IS BEST FOR YOUR HOME?
• Choose Aluminium if you want sleek modern design, durability, and long-term value.
• Choose uPVC if you’re working to a tighter budget and want good performance at a lower price point.
  Aluminium vs. uPVC: Which Windows Are Right for Your Home? | The Fenestration Network
  CONCLUSION Both aluminium and uPVC windows have their place in UK homes. Aluminium offers superior style, longevity, and recyclability, while uPVC delivers affordability and strong insulation. The right choice depends on your priorities.