UPVC vs Aluminum Windows

In this article
1Introduction
Choosing the right window frame material is one of the most important decisions you'll make when upgrading your home's windows.
UPVC and aluminum stand as the two most popular choices for modern window frames, each offering distinct advantages and potential drawbacks. At Window Warriors, we've installed thousands of both types across Newcastle and the North East, giving us unique insight into how they perform in our regional climate and which might be best suited for different property types and homeowner priorities.
Why Material Choice Matters
Your window frame material affects everything from energy efficiency and maintenance requirements to aesthetics and longevity. Making the right choice can significantly impact your home's comfort, appearance, and running costs for decades to come.

2UPVC Windows: Pros & Cons
UPVC (Unplasticized Polyvinyl Chloride) windows have become the most popular choice for residential installations across the UK, accounting for over 80% of new window fittings.
This popularity isn't without reason. UPVC offers a compelling package of benefits that make it particularly well-suited to the variable British climate and the practical needs of modern homeowners. Let's examine these advantages in detail, along with some potential limitations to consider.
Advantages of UPVC Windows
Excellent Thermal Efficiency
UPVC frames contain multiple internal chambers that create natural insulation barriers. Combined with double or triple glazing, they can reduce heat loss by up to 40% compared to older window systems, potentially saving hundreds of pounds annually on energy bills.
Cost-Effective
UPVC windows typically cost 30-50% less than equivalent aluminum options, making them the budget-friendly choice for many homeowners. Their excellent durability and low maintenance requirements also mean lower lifetime costs.
Low Maintenance
UPVC won't rot, warp, or corrode, and requires nothing more than occasional cleaning with soapy water. The color is integrated throughout the material rather than surface-applied, so it won't peel, flake, or require repainting.
Weather Resistant
Particularly well-suited to the British climate, UPVC withstands persistent rain, coastal salt air, and temperature fluctuations without degrading. This makes it an especially good choice for properties in Newcastle and other North East coastal areas.
While UPVC windows offer a compelling range of benefits, they aren't without limitations. It's important to consider these potential drawbacks when making your decision:
Limitations of UPVC Windows
Aesthetic Limitations
UPVC frames are typically bulkier than aluminum alternatives, which can be an issue for those seeking a sleek, minimal look. While color options have expanded greatly in recent years, they still don't offer the extensive range of finishes available with aluminum.
Historical Properties
For period properties, particularly those in conservation areas, UPVC may not be permitted or may not provide the authentic appearance required to maintain the character of the building.
Structural Limitations
For very large openings or specialized designs, UPVC frames may not provide the structural strength required. In these cases, aluminum or a composite solution might be necessary.
Environmental Considerations
While modern UPVC is recyclable, older UPVC products can pose disposal challenges. However, manufacturers have made significant strides in developing more environmentally friendly UPVC formulations in recent years.

3Aluminum Windows: Pros & Cons
Aluminum windows have been a popular choice for window frames for many years. They offer a range of benefits, including durability, strength, and a sleek appearance.
Let's explore the advantages and disadvantages of aluminum windows in more detail.
Advantages of Aluminum Windows
Excellent Thermal Efficiency
Aluminum windows are known for their excellent thermal efficiency. They can help regulate temperature in your home, reducing the need for heating and cooling.
Cost-Effective
Aluminum windows are generally more cost-effective than UPVC or timber windows. They are also lightweight, which can reduce installation costs.
Low Maintenance
Aluminum windows require minimal maintenance. They don't rot, warp, or corrode, and can be cleaned with a simple cloth.
Weather Resistant
Aluminum windows are highly weather-resistant. They can withstand harsh weather conditions, including rain, coastal salt air, and temperature fluctuations.
While aluminum windows offer a range of benefits, they also have some potential drawbacks to consider:
Disadvantages of Aluminum Windows
Cost
Aluminum windows can be more expensive than UPVC or timber windows. The initial cost is higher, but they can last a long time with proper maintenance.
Weight
Aluminum windows are heavier than UPVC or timber windows. This can make them more difficult to install and may require additional support.
Aesthetic Limitations
Aluminum windows can sometimes look less attractive than other window materials. They may not be suitable for period properties or those seeking a traditional appearance.
Environmental Considerations
Aluminum windows are recyclable, but the process can be more complex than for UPVC or timber windows.

4Head-to-Head Comparison
Now that we've explored both materials in detail, let's compare UPVC and aluminum windows directly across key factors that matter most to homeowners.
Feature | UPVC Windows | Aluminum Windows |
---|---|---|
Cost | More affordable upfront (£300-£800 per window) | Higher initial cost (£500-£1,200 per window) |
Thermal Efficiency | Excellent (inherent insulating properties) | Good with thermal breaks, but naturally conductive |
Durability | 20-30 years with minimal maintenance | 30-40+ years with proper care |
Maintenance | Very low (simple cleaning only) | Low (occasional cleaning and hardware checks) |
Frame Size | Bulkier frames, less glass area | Slimmer frames, maximizing glass area |
Aesthetics | Limited color options, traditional look | Wide range of finishes, contemporary appearance |
Environmental Impact | Recyclable but with some limitations | Highly recyclable (up to 95% of material) |
Best For | Standard residential properties, budget-conscious homeowners | Contemporary designs, large openings, architectural projects |
5Conclusion & Recommendations
Choosing between UPVC and aluminum windows ultimately depends on your specific requirements, property type, and budget constraints. Based on our extensive experience installing both window types across Newcastle and the North East, here are our recommendations:
Choose UPVC Windows If:
- You're working with a more limited budget
- Energy efficiency is your top priority
- You have a traditional property where slimline frames aren't essential
- You want the most hassle-free maintenance experience
- You live in a particularly cold area or coastal region
Choose Aluminum Windows If:
- You have a contemporary property or desire a modern aesthetic
- You need very large window spans or unusual shapes
- Maximizing glass area and natural light is essential
- Long-term durability (30+ years) is a priority
- You're working on an architectural project requiring specific finishes
For many Newcastle homeowners, the ideal solution might involve using both materials strategically throughout their property. For example, aluminum frames might be perfect for a large, statement bifold door or picture window at the rear of the property, while UPVC could be the practical choice for standard windows elsewhere.
At Window Warriors, we're committed to providing honest, tailored advice based on your specific circumstances rather than pushing a one-size-fits-all approach. Our consultations involve a thorough assessment of your property, lifestyle needs, and aesthetic preferences to recommend the ideal window solution.
Get Expert Window Advice
Still unsure which window material is right for your home? Our window specialists can provide personalized advice based on your property, budget, and specific requirements.

Mike Williams
Window materials specialist with over 12 years of experience in the window industry. Mike has helped hundreds of homeowners across the North East choose the perfect windows for their properties.
Related Articles

5 Benefits of UPVC Windows You Need to Know
Discover why UPVC windows are the popular choice for homeowners looking for energy efficiency, durability, and style.
Read Article
Energy Efficiency: Reduce Your Bills
Find out how modern window technology can significantly cut your energy bills and make your home more comfortable year-round.
Read Article