Bay and bow windows
High-performance uPVC bay and bow window systems for trade installers across Leeds and beyond, offering fast supply, strong thermal performance and consistent fabrication quality.
Our Bespoke Products:
We manufacture products to your exact specifications, with delivery typically within two weeks.
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Casement windows
Bespoke uPVC casement windows (aluminium available) built with Eurocell profiles, double or triple glazing and premium glass from Martin Dales and Glasscraft.
Bespoke windows
Made-to-measure uPVC and aluminium replacement windows manufactured in Leeds, with custom sizes, glazing specifications, hardware and colour finishes to suit any trade project.
Flush sash windows
Bespoke uPVC flush sash windows built with Eurocell Logik and Modus profiles, double or triple glazing and premium glass from Martin Dales and Glasscraft.
Integral blinds
Dust-free integral blinds in venetian or pleated styles, available with hand cord or electric operation across our glazed units.
Tilt and turn windows
Dual-action tilt and turn windows offering secure ventilation and easy cleaning. Built on Eurocell Logik or Modus profiles for strong thermal performance.
Aluminium windows
Trade aluminium windows with slim profiles, strong thermal performance and fast UK supply from Alpine Windows & Doors in Leeds.
uPVC windows
The UK's most popular window material, available in proven styles with bespoke sizing, glazing and colour finishes for the trade.
Profile performance and security specifications
Our uPVC frames use Eurocell’s Logik 70mm and Modus 75mm multi-chambered systems. The trapped air pockets cut heat loss across the frame, achieving U-values from around 1.2 W/m²K on standard double glazing down to 0.7 W/m²K on triple glazing.
Glass is sourced from Martindale’s in Blackburn and Glasscraft in Leeds, both using Planitherm Total+ Low-E coatings with warm-edge spacers. Every unit is paired with Secure by Design locking hardware for trade installers who need certified security as standard.
Styles, colours and trade trust
We manufacture casement, flush sash, sliding sash, tilt and turn and bay & bow windows. Foil options include Anthracite Grey, Slate Grey, Black Ash, Rosewood, Golden Oak and Irish Oak, plus dual-colour configurations for contrasting interior and exterior finishes.
We’re proud that installers across Yorkshire and the wider UK regularly choose us for a few reasons. We remain a family-run business, with approaching 80 years of combined industry experience between directors Peter and Richard. There’s no minimum order value, so regardless of whether you just need a quick install for a client’s replacement bathroom window, or a full-scale commercial project, we have the capacity to help.
How we work with the trade
Our Process
Initial quote
Send us your sizes online or over the phone. We turn most trade quotes around within 24 hours, and there is no obligation to proceed.
Conversation
We talk through the priorities for you or your client, be it design, thermal performance, security, colour finish, glazing, or locking.
Manufacturing
We manufacture in-house at our Morley facility using Eurocell uPVC profiles, DoorCo composite slabs and Alunet aluminium systems. Typical lead time is two weeks.
Bespoke build, testing and supply
Every frame is made to your exact sizes and quality-checked before despatch. Supply only as standard, full installation available on request.
Trade uPVC windows: your questions answered
Below are the questions we hear most often from window companies and general builders sourcing uPVC windows in Leeds and across Yorkshire.
Contact UsOur Eurocell Logik frames reach around 1.2 W/m²K with standard double glazing, while Modus profiles with triple glazing hit 0.7 to 0.8 W/m²K, matching Passivhaus thermal standards for low heat loss.
We use Eurocell profiles, including Logik (70mm) for standard residential work and Modus (75mm) for premium flush sash installations. Both are multi-chambered, UV-stabilised and engineered for long-term durability without warping or fading.
Yes, aluminium windows and bifold doors are available on request alongside our core uPVC range. Get in touch with our trade office to discuss specifications, sizes and pricing for your project.
We turn quotes around within 24 hours and deliver most orders within two weeks. Free delivery is included across Leeds, with orders accepted from Bradford, Selby and further across the UK.
Yes. All our uPVC windows are fitted with Secure by Design locking mechanisms as standard, giving installers and homeowners peace of mind against potential intruders without paying extra for upgraded hardware.
What fellow trade professionals say about us
Honest feedback from the installers, builders and double glazing companies we supply day in, day out.
Had both front and back stable doors fitted recently, and I have to say the men that came to fit them were really good, pleasant, efficient and did a great job! I am really pleased with my doors and the way the men conducted themselves; they are a credit to Alpine – thanks again.
Carol Marshall
I can’t thank the team at Alpine enough for all of the hard work on your build. They were great from the start, being really helpful through the quote process and in advising. The fitting team worked so hard to make sure everything was perfect, and nothing was too much trouble. We are so happy with Alpine. The results really speak for themselves, and we would not hesitate to recommend them to anyone!
Kate Oakes
We recently renovated a small cottage and needed to consider the traditional look and feel of the property, Alpine Windows and Doors were brilliant, listening to our requirements, we ended up with 6 sash windows and a new composite door all in a non standard colour, which was no problem. from placing the order to the completion of the installation nice and smooth, 5 weeks time frame, fitted perfectly with our project, would highly recommend
Tom Crowe
Excellent service from start to finish. They made the process from colours to design easy, nothing was too much trouble. Lovely polite staff and fitters. Fitters turned up on time and finished to an exceptional standard (I am a perfectionist!) left my home clean and tidy and removed all old frames and doors. Couldn’t fault them at any stage and would highly recommend them. I would give more than 5* if I could.
Sarah Wood
Peter at Alpine has done the windows and doors at both our offices and my home. The service was very professional, fast and competitive price wise. I had a combination of Aluminium bi folds and French doors with UPVC windows. I cannot fault the quality. Very happy to recommend for both domestic and commercial projects.
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