If you’ve made the decision that your windows need replacing, choosing the material for your new windows is one of the most important choices you will make.
The debate of aluminium windows vs uPVC often comes down to balancing your property’s architectural style, your long-term budget, and your goals for energy efficiency, but how do you decide which is right for your home?
At Boston Trade Frames, founded in 1981 by joiner Nigel Apps, we have years of experience supplying both high-performance uPVC and aluminium solutions. We know that there is no “one size fits all” answer; the right choice depends entirely on the specific needs of your project and the long-term implications of each option.
In recent years, both materials have advanced significantly, offering homeowners better security and insulation than ever before.
Why replace your old windows?
If your current window frames are more than 15 years old, they are likely the primary cause of heat loss in your home, leading to higher heating bills. Upgrading to modern double glazing or triple glazing provides several immediate benefits:
- Lower energy bills: Modern frames prevent heat transfer, keeping your home warmer for longer.
- Reduced noise: New installations offer superior sound insulation.
- Increased security: Modern uPVC and aluminium frames feature multi-point locking systems and internal glazing beads that are far more difficult for intruders to bypass.
The respective benefits of uPVC and aluminium
uPVC Windows: The versatile all-rounder
uPVC remains the most popular choice for homeowners across the UK, and our Kömmerling C70 and O70 systems are renowned for their durability and performance.
- Thermal efficiency: uPVC is a natural insulator. The multi-chambered design of modern uPVC frames are an incredibly effective barrier against the cold.
- Low maintenance: You don’t need to paint or sand uPVC. Just a quick wipe with soapy water is all that’s needed.
- Cost-effectiveness: Generally, uPVC is more budget-friendly than aluminium, making it an excellent choice for projects where cost is a factor.
Aluminium Windows: The contemporary powerhouse
If you are looking for a modern look with expansive glass areas, aluminium is the standout material.
- Slim profiles: Because aluminium is inherently strong, the frames can be much thinner than uPVC. This allows for large windows that maximise natural light.
- Thermal break technology: Modern aluminium windows are no longer cold. They feature a polyamide thermal break which significantly reduces heat transfer.
- Longevity: Aluminium is exceptionally resilient against weather conditions. It does not warp or flex, often lasting 45 years or more – outliving uPVC windows by some 20-25 years.
Is aluminium more expensive than uPVC?
Generally, yes. Aluminium typically carries a higher price tag – often 25% to 50% more – due to the cost of raw materials and the complex manufacturing process. However, its longer lifespan can make it more cost-effective over several decades.
Making the right choice: Which is best for you?
When weighing up aluminium windows vs uPVC, your decision should be guided by your property type and your long-term plans.
Choose uPVC if:
- You have a traditional home: uPVC windows are highly adaptable and can be manufactured as sash windows or with wood-grain foils that mimic the look of timber.
- Budget is a priority: If you want the best energy efficiency for every pound spent, uPVC offers an incredible return on investment.
- You want maximum warmth: In very cold or exposed areas, the natural thermal efficiency of uPVC is hard to beat.
Choose aluminium if:
- You are doing a modern renovation: The sleek, metallic finish of aluminium window frames, available in a wide range of colours, perfectly complements bifold doors.
- You have large apertures: If you want floor-to-ceiling glass, the structural strength of aluminium is required to hold the weight of the units safely.
- You want “fit and forget” durability: Aluminium is arguably the most durable material on the market, resisting corrosion even in coastal environments.
Character and conservation: Choosing the right style for older homes
When it comes to period properties, the choice between aluminium windows vs uPVC often depends on the specific era of your home and local planning restrictions. Historically, many homeowners felt forced to choose between draughty original timber windows or modern plastic that looked out of place. Today, however, there are sympathetic solutions for both uPVC and aluminium.
Maintaining character in older homes
For Victorian or Edwardian terraces, uPVC is often the preferred choice when it is manufactured as a “heritage” system. Modern uPVC sash windows can be designed with authentic features such as decorative “horns” and wood-grain foils that replicate the look of painted timber without the hassle of upkeep.
The industrial heritage look
For mid-century industrial conversions, aluminium frames are often the right choice as aluminium can mimic steel windows that were popular in the early 20th century. If your period home features large, multi-pane windows, the strength of aluminium allows for slim glazing bars that maintain the home’s historic “light and airy” feel without the bulk of uPVC.
Customisation options for homeowners
Both materials now offer a level of customisation that allows you to create a bespoke look for your property. Take a look at some of our recent installations in our Gallery to see some ideas of what we can offer.
- Colour choice: While white is standard for uPVC windows, you can also choose from various timber-effect foils like Irish Oak, or Anthracite Grey for a more contemporary look. Aluminium offers even more variety, with the ability to be powder-coated in almost any RAL colour.
- Glazing performance: You can opt for triple glazing in both materials to achieve optimal thermal performance.
- Hardware: From contemporary handles to traditional heritage locks, the hardware you choose can completely change the character of your new windows.
Contact Boston Trade Frames today
Whether you have decided on the sleek lines of aluminium or the dependable warmth of uPVC, Boston Trade Frames is here to provide high-quality products that last. We serve both trade professionals and homeowners, ensuring that every installation meets our rigorous standards.
Get in touch with Nigel and the team to discuss your replacement windows:
- Email: nigel@bostontradeframes.co.uk
- Tel: 011205 311144
- Online: Contact Us Here
Let us help you make the right choice for your home improvement journey.
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