Entrance
Our entrance door range covers DoorCo composite slabs and Eurocell uPVC front doors, manufactured in-house at our Morley facility.
Browse our aluminium door range
Take a look through the styles and configurations we supply. Whether you're fitting bifolds, front doors or patio sets, we'll match the right material to the job.
- Details / Features
- Specifications
- Glazing & Security
- Colours
- Downloads
Our specifications
Feel free to get in touch if you have any questions. These specifications cover our bifold doors.
Contact Us| Specification | Detail |
|---|---|
| Panels | 2 to 14 sashes (7 each direction) |
| Frame width | 48.5mm (55mm for sashes over 2600mm) |
| Sightline | 107mm including 10mm gasket |
| Frame depth | 73mm |
| Max sash size | 1200mm wide x 3000mm high |
| U-value | Typically 1.4 (double glazed) / 1.0 (triple glazed) |
| Glass | LowE toughened double glazing as standard; 44mm triple glazing optional |
| Locking | 5-point multi point locking, 3-star Ultion cylinder option |
| Security | PAS 24 rated with glass and cylinder upgrade |
| Hardware | Engineering grade stainless steel rollers and track |
| Handles | Anthracite, black, white, chrome, satin aluminium |
| Colours | Anthracite Grey, Black, White (marine grade powder coating) |
| Threshold | Integrated cill and weathered threshold (55mm) – low and rebated options available |
| Blinds | Magnetic integral blinds (optional) |
| Accreditations | Secure-by-Design, PAS 24 compliant |
| Lead time | From 2 weeks glazed |
Glazing and security specifications
LowE toughened double glazing is fitted as standard, with 44mm triple glazing available for projects demanding higher thermal and acoustic performance. Security is built in through a five point multi point locking system, three-star barrels and Secure-by-Design hardware, with PAS 24 sign-off available on upgrade.
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Three stock colours, faster turnaround
We hold Anthracite Grey, Black and White in stock as standard, all finished in marine grade powder coating. Dual colour and full RAL options are available on request, though stock colours give the quickest lead times.
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Download the full specifications
Get full technical drawings, U-values, hardware details and configuration options in our product brochures. Download a copy to share with clients or specifiers, or get in touch if you need anything specific.
Contact UsTrade aluminium doors, supplied your way
Our aluminium product range covers bifolds, french doors, sliding patios and aluminium entrance doors. The JA-48 bifold sits at the core, but we’ll accommodate bespoke requests where the configuration calls for something different.
From single-unit orders to large volume jobs, we work with installers and general builders to spec the right choice of frame, glass and threshold for each project. Aluminium systems are sourced through Alunet for proven quality.
A family-run trade supplier you can trust
Peter and Richard bring approaching 80 years of combined industry experience to every order. We’re a family-run business based in Morley, Leeds, and we’ve been manufacturing windows and doors for the trade for over 20 years.
Expect same-day responses to trade enquiries, quotes within 24 hours and typical delivery within two weeks. It’s a personal service built around installers who need accurate specifications and fast lead times.
Aluminium doors trade FAQs
Some of the questions we get asked most often by installers and builders sourcing aluminium doors. If yours isn't covered, drop us an email or WhatsApp and we'll come back the same day.
Contact UsThe JA-48 typically achieves a U-value of 1.4 with our ultra-lowE double glazing as standard and as low as 1.0 with a 44mm triple glazed unit, comfortably meeting current building regulations.
Yes. With a glazing upgrade and three-star Ultion locking cylinder, the JA-48 achieves PAS 24. All systems use Secure-by-Design hardware and a five point multi point locking mechanism as standard.
We stock Anthracite Grey, Black and White in marine grade powder coating for fast turnaround. Dual colour and full RAL options are available on request if a project requires a bespoke finish.
We typically deliver glazed aluminium doors within two weeks of order, often sooner for unglazed units. Quotes are turned around within 24 hours of receiving full specifications by email or WhatsApp.
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.
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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