Slim frames. Strong security.
Slimline aluminium casement windows that keep frames discreet and views clear.
Highly rated on:
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.
As an accredited supplier of Origin’s market leading aluminium double glazing, we’re the first choice for Bristol and the surrounding area.
4.8 stars based on 440 reviews - our customers consistently praise our professional installation and exceptional service.
We provide completely free, no-obligation quotes with transparent pricing and no pressure sales tactics whatsoever.
Transform your home with aluminium casement windows, combining reliable security with simple, effective ventilation.
Outward-opening aluminium casement windows use slim frames to maximise glass area while keeping the design simple and functional.
Multi-point locking, secure handles and reinforced hinges help protect common access points and provide everyday peace of mind.
Durable aluminium frames need minimal upkeep, with smooth surfaces that clean easily and resist warping over time.
Side-hung and top-hung opening options allow you to manage airflow easily, helping keep rooms comfortable without leaving windows fully open.
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...
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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....
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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
Looking for a window that performs as well as it looks? Aluminium casement windows combine tight sealing, insulated frames and glazing options that help reduce heat loss and energy use.
You want aluminium casement windows that lock firmly, resist common attack points and stay stable over time. That’s why we specify systems built around tested hardware and proven security standards.
PAS 24:2016 security testing (OW-70 and OW-80)
These windows meet a recognised UK security test for forced-entry resistance.
Secured by Design accredited (OW-70 and OW-80)
Police-backed accreditation that focuses on reducing opportunistic break-ins.
Multi-point locking and locking handles
The locking system secures the sash at multiple points, not just one, helping reduce leverage and prying.
You want aluminium casement windows that cut draughts and keep rooms comfortable. Modern systems use thermal breaks, tight weather seals and high-performance glazing to reduce heat loss.
Here are answers to the most commonly asked questions about our tilt and turn windows to help you make an informed decision.
Contact UsThey are outward-opening windows with a hinged sash (side-hung or top-hung) that seal tightly when closed for weather protection and day-to-day security.
Yes. Our Origin OW-70 and OW-80 casement windows are tested to PAS 24:2016 and accredited to Secured by Design, with multi-point locking and hinge protection.
Yes. With the right specification, Origin OW-70 can achieve a U-value of 1.1 with triple glazing, OW-80 can reach 0.9 with Aerogel and triple glazing, and the Soho Window can achieve U-values as low as 0.78 W/m²K.
Yes. The Origin Soho Window gives a steel-style appearance with slim sightlines and a flush casement design.
If you would like to leave us a message at any point during the day, even during closed hours, please fill out our online contact form, or click below to start your free quote. We will get back to you as soon as possible with everything you need to know about our Tilt & Turn windows.
We look forward to hearing from you soon!
