Associated Windows
double glazing prices bristol

10 Year Guarantee

Once your installation is complete, just sit back and relax. Enjoy the peace of mind that only a ten year insurance backed guarantee can offer.

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Origin Premium Partner

As an accredited supplier of Origin’s market leading aluminium double glazing, we’re the first choice for Bristol and the surrounding area.

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Highly Rated Service

4.8 stars based on 440 reviews - our customers consistently praise our professional installation and exceptional service.

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Free Quotes Available

We provide completely free, no-obligation quotes with transparent pricing and no pressure sales tactics whatsoever.

Aluminium windows & doors with Cortizo benefits in Bristol

Cortizo aluminium systems are engineered for modern living. Our installations bring:

Wide expanses of glass

Slim aluminium frames allow larger glass panes, letting in more natural light to support wellbeing, productivity, and a brighter home environment.

Durability

Aluminium is corrosion-resistant and long-lasting, ensuring your windows and doors remain robust for decades.

Modern design

Clean sightlines and minimalist profiles suit both contemporary builds and stylish renovations. Choose between any RAL colour.

Low maintenance

No painting or sealing required, a quick wipe keeps frames looking pristine.


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    Our Reviews

    A big thank you to Jason and his team for their fantastic work! We've been working together for quite some time now, and they've just...
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    Ellie

    Via Trustpilot

    What a lovely team! Went out of their way to help, Very friendly and helpful indeed! Thank you to all at associated windows

    Kane Trimnell

    Via Google

    Great company to work with, would highly recommend Rob and the team.

    Adi D

    Via Yell

    Excellent quality and service, amazing Origin products. We would highly recommend.

    Darren James

    Via Trustpilot

    We are extremely happy with our new windows and door from Associated Windows. The pricing and quote were clear with no hard sell. They managed...
    Read more

    Janine Talbot

    Via Google

    Outstanding company with a straightforward, honest approach to pricing and customer service. The quote provided was fair and accurate—no inflated numbers followed by sudden discounts....
    Read more

    Verified Reviewer

    Via Checkatrade

    A big thank you to Jason and his team for their fantastic work! We’ve been working together for quite some time now, and they’ve just completed the installation of triple glazed windows at our Cotswolds barn conversion. The windows look absolutely fabulous — the quality is outstanding, and the attention to detail has been excellent throughout.
    The Origin triple glazed triple sliders in particular create a real wow effect and have completely transformed the space.
    Looking forward to the next project together!

    Ellie

    Via Trustpilot

    What a lovely team! Went out of their way to help, Very friendly and helpful indeed! Thank you to all at associated windows

    Kane Trimnell

    Via Google

    Great company to work with, would highly recommend Rob and the team.

    Adi D

    Via Yell

    Excellent quality and service, amazing Origin products. We would highly recommend.

    Darren James

    Via Trustpilot

    We are extremely happy with our new windows and door from Associated Windows. The pricing and quote were clear with no hard sell. They managed to get the windows and door installed within our very tight time frame (our fault!) and the finished products are well made and look great. I definitely recommend them as a window/door company!

    Janine Talbot

    Via Google

    Outstanding company with a straightforward, honest approach to pricing and customer service. The quote provided was fair and accurate—no inflated numbers followed by sudden discounts. We received expert advice during the window measurement and ordering process, which was handled professionally. Installation was fast, clean, and high-quality. We’ve used this company twice over the past 15 years, and both times they delivered the best combination of price and workmanship.

    Verified Reviewer

    Via Checkatrade

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    Experience seamless indoor-outdoor living with Cortizo black aluminium bi-fold doors. Slim frames maximize natural light, offering expansive views of lush greenery.

    What are Cortizo windows & doors?

    Cortizo is a leading European manufacturer of aluminium window and door systems. Here at Associated Windows, we supply and install Cortizo products across Bristol and the nearby areas, helping homeowners combine modern performance with eye-catching design.

    Aluminium’s strength allows frames to support wide panes, bathing rooms in natural light. As well as giving your home a modern look, studies show that increased exposure to sunlight can boost mood, productivity and overall wellbeing.

    Cortizo systems are durable, low-maintenance and fully customisable. Whether you’re fitting slim flush sash windows, the innovative hidden sash tilt & turn, or bold bi-fold doors, there’s a style to suit every project. We also install Cortizo’s flagship Vision 20 sliding door, perfect for indoor-outdoor living.

    Leading aluminium windows for Bristol

    Our Cortizo window range offers versatility and design freedom:

    • Casement windows: The UK’s most popular style, they open inwards or outwards from a singular frame.
    • Flush sash windows: The glass sits flush, meaning completely level with frame for an in-demand look.
    • Hidden sash tilt & turn windows: Frame concealed externally; tilt for ventilation or turn fully for cleaning.
    • Sliding windows: Horizontal glide systems ideal for wide openings or areas with limited height.

    Each window can be customised with double or triple glazing, specialist glass, and a wide range of finishes including any RAL colour or wood-effect coating.

    Aluminium doors designed for modern living

    Cortizo door systems deliver performance and style. Our options include:

    • COR Vision / Vision 20 sliding doors: Ultra-slim 20 mm central interlock, generous glass panes, the frames can be concealed around the perimeter.
    • 4700 sliding patio doors: Wide multi-sash designs for panoramic views and excellent insulation.
    • Lift & slide doors: Smooth operation for heavy panels with strong weather and thermal performance.
    • Bi-folding doors: Fold neatly to one side, ideal for open-plan living or patio spaces.

    All doors feature secure locking, smooth hardware, and a huge choice of colours and finishes.

    Close-up of sleek black Cortizo aluminium sliding door hardware, showcasing thin frames for maximum natural light. Modern and durable.
    Showcasing a modern curved house with Cortizo black aluminium windows

    Introducing the flagship Vision 20 sliding door

    The Cortizo Vision 20 sliding door is one of the most sought-after aluminium doors on the market. Its ultra-slim interlocks and vast glass panes maximise light and create uninterrupted views.

    It features an elegant design with a central junction of only 20 mm and offers the possibility of concealing the frame around the perimeter.

    Who are Associated Windows?

    Associated Windows is a trusted Bristol installer of high-quality uPVC and aluminium windows, doors, and rooflights. Serving homes across Bristol and the surrounding area, we provide expert advice, tailored solutions, and professional installations.

    Which? Trusted Trader accredited, with a 10-year guarantee, we pride ourselves on helping homeowners find the perfect windows and doors for their property.

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    Frequently asked questions

    Here are a few common questions we hear from customers across Bristol when it comes to the Cortizo range, and aluminium products in general.

    About Us

    What makes Cortizo aluminium different from uPVC?

    Aluminium allows slimmer frames, larger glass areas and higher strength. It's growing in popularity across the country.

    Can I get custom colours and finishes?

    Yes, Cortizo systems can be finished in any RAL colour, including dual-colour and wood-effect coatings.

    Are Cortizo windows energy efficient?

    Yes, thermal break technology achieves U-values as low as 1.0 W/m²K with triple glazing, keeping homes warmer and energy bills lower.

    Do you fit Cortizo in older homes?

    Absolutely, our range suits everything from contemporary extensions to stylish renovations and period properties.

    Can I operate hidden sash windows easily?

    Yes, hidden sash tilt & turn windows tilt for ventilation or fully turn open for cleaning.

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