Slim, Strong & Stylish:
Aluminium Windows in Winchester
For years, aluminium windows had a bad reputation for being cold and prone to condensation. Those days are gone. Modern aluminium windows feature advanced “thermal break” technology—a barrier of polyamide insulation that prevents heat transfer—making them just as warm as uPVC.
Today, homeowners across Winchester—from the Victorian terraces in Fulflood to the historic properties of St Cross—are choosing aluminium for one reason: Light. The inherent strength of aluminium allows for incredibly slim frames and larger panes of glass, flooding your home with natural light.
Why Choose KJM?
We have been installing quality windows across Hampshire since 1983. We are committed to honest advice, high standards, and a "no pressure" promise. Don't just take our word for it—we are proud to be an endorsed Which? Trusted Trader.
Key Takeaways for Winchester Homeowners
- Ultra-Slim Sightlines: Enjoy panoramic views with frames up to 50% slimmer than standard uPVC.
- Thermally Broken: Advanced insulation stops the "cold metal" feel and achieves high Energy Ratings.
- Heritage 'Steel-Look': Perfect for replacing old Crittall™ windows in period properties without losing character.
- Infinite Colours: Available in any RAL colour, with Agate Grey and Black being the top choices in Hampshire.
Perfect match for bifolds
The primary reason homeowners in modern developments like Kings Barton choose aluminium is for the “wow factor.” Because aluminium is inherently stronger than uPVC, the frames can be made much thinner while still holding heavy double or triple-glazed units.
This means you get less plastic and more glass. Our Smart Systems and Sheerline profiles are designed to flood your living space with natural light, creating a seamless link between your home and garden.
They are the perfect partner for bi-folding or sliding doors, ensuring that your windows and doors match perfectly in sightline and colour. It is the closest you can get to a “frameless” window while maintaining high security and thermal efficiency.
Heritage Windows
The Classic “Steel” Look, Evolved
Winchester is home to many beautiful properties from the 1930s and Art Deco periods that originally featured steel windows. While stylish, original steel frames are notorious for rusting, twisting, and letting the heat out.
Our Heritage Aluminium range is designed specifically to solve this. Using slim, stepped profiles and decorative glazing bars, we can replicate the authentic grid-style look of classic steel windows.
The difference? You get modern A-rated thermal performance and a polyester powder-coated finish that will never rust or peel. It allows you to retain the essential character of your period home without suffering through another cold Winchester winter.
Aluminium Windows
Built to Last a Lifetime
One of the biggest advantages of aluminium is the finish. Unlike uPVC which can sometimes discolour over decades, our aluminium frames are finished with a marine-grade polyester powder coating.
This process bakes the colour into the metal, creating a finish that is incredibly resistant to scratching, fading, and the elements. While Anthracite Grey (RAL 7016) and Jet Black are currently the most popular choices in Winchester, we can match any RAL colour to suit your interior decor.
Maintenance is virtually non-existent; a simple wipe-down with warm soapy water is all that is needed to keep them looking brand new. With a life expectancy of over 40 years, aluminium represents a true long-term investment in your property.
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Glazing Prices Winchester
Why Choose KJM for Your Project?
Local Experts Since 1983
We have been installing windows and doors across Winchester and Hampshire for over 40 years. Unlike national chains, we are a local business that relies on our reputation. We don’t use high-pressure sales tactics; we simply offer honest advice and high-quality products.
No Subcontractors
When you choose KJM, you get KJM. We employ our own installation teams rather than relying on random subcontractors. This ensures that the people working in your home are accountable, polite, and trained to our exacting standards.
Free, No-Obligation Quotes
Whether you use our online pricing engine below for a quick estimate or prefer a home visit for a more accurate figure, our service is 100% free and without obligation. If you book a site survey, our team will measure up and discuss your options without the “hard sell”—just a fixed, transparent price for you to consider in your own time.
Common Questions About Aluminium Windows
This is the most common myth we hear! In the 1970s and 80s, old aluminium frames were cold and prone to condensation. However, modern technology has changed completely.
All our aluminium frames feature a polyamide thermal break. This is a plastic barrier inserted inside the metal frame that separates the cold outside from the warm inside. This effectively stops the "sweating" issue and ensures our aluminium windows achieve excellent energy ratings, comparable to uPVC.
Generally, aluminium windows cost between 30% to 50% more than standard uPVC windows. This is due to the higher cost of the raw material and the manufacturing process.
However, many Winchester homeowners view it as a better long-term investment. Aluminium has a longer lifespan (often 40+ years) and adds significant "kerb appeal" to a property, which can increase its resale value.
Yes, and they are often the best choice for it. If you live in a Victorian terrace in Fulflood or a historic property in St Cross, our Heritage 'Steel-Look' range is designed to replicate the thin sightlines of original steel windows.
We use horizontal glazing bars and a slim stepped profile to mimic the classic grid appearance, giving you the authentic look without the rust or draughts associated with old metal frames.
No. Unlike timber which needs painting, or low-quality plastic which can yellow, our aluminium frames are finished with a marine-grade polyester powder coating.
This finish is baked onto the metal at high temperatures, creating a durable surface that is resistant to fading, scratching, and peeling. Whether you choose Anthracite Grey or simple White, it will look new for decades with just a simple wipe down.
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