Aluminium windows and doors for a modern extension
One of our recent installations of Aluna bifold doors in Manchester, to a new build extension at the back of a traditional home. Completed in the summer, the installation includes a four-pane bifold, a three-pane bifold, and a combined door and window set. All powder coated in the popular RAL 9005 black matt finish inside and out, with matching black hardware and high performance glass units.
This project forms part of a contemporary brick-built extension to a detached home with a gable roof. The homeowner wanted a glazing solution that would open the living area to the garden while maintaining visual contrast against the brickwork. The chosen black finish achieves that perfectly — bold, modern, and timeless.
At the side elevation, a single entrance door is coupled with windows, some having opening fanlights. This provides a highly accessible entrance with added ventilation. Th remaining two elevations have Aluna bifold doors, at reduced sizes to create folding windows. There is a further bifold door set separating the main house from the extension as well.

Aluna bifold doors. Slim, strong, weather resistant
The Northwest of England can have some very wet and windy weather, and our client wanted the reassurance of a weathertight bifold and door system. The Aluna doors come with extensive sealing throughout. Every door is operated by a multipoint system, meaning the folding sashes are pulled tight against the outer frame, seals and gaskets.
Expertly-crafted and professionally installed, Aluna bifold doors are now one of the most popular in the UK, because of their outstanding price to quality point. And they come with similar sightlines and performance to the more expensive German systems but at a substantially reduced price and significantly faster lead times.
For our homeowner customer the slim 107mm sightlines provide more glass and less visible frame, with no loss of strength or security. Aluna doors are security tested to the latest standards, come with premium grade aluminium and a Qualicoat-assured colour finish inside and out.
The glass provided throughout is toughened safety glass, having a soft-coat low-emissivity coating, warm edge spacer bars and argon gas fill.
PRECISION SURVEY AND EXPERT INSTALLATION
As with every Fenestration Network bifold door across our many quality brands, project, this installation started with a professional survey and close coordination with the supplier to ensure timely delivery. Our team managed all communication with the homeowner and worked around the construction schedule, guaranteeing an accurate fit and smooth installation.
The result is an installation that enhances the property both visually and functionally — clean sightlines, smooth operation, and consistent quality throughout.
PREMIUM BIFOLD DOORS IN MANCHESTER AND NORTH WEST ENGLAND
Aluna bifold doors are just part of our overall premium patio door collection. Latest generation aluminium with maximum security, exceptional weather sealing and designed to provide long-lasting reliability for years to come.
Contact us today to discuss your project and let us help you transform your home with Alunet bifold doors and windows.
Customer Testimonial
I got an email the next day from Tom at the Fenestration Network and they have been very quick and very responsive on the project. So much so that we went with them for this job — they were very helpful and had a survey booked within a week.
From the first contact, Tom was professional and responsive. We provided approximate sizes for our bi-fold doors and windows, and within 48 hours Tom came back with a detailed quotation and full drawings suggesting top openers on one side.
My experience has been first class. I previously worked in the architectural industry for 12 years manufacturing these types of products and was impressed by how this company operates.
The installation team, Matt and Gary, were excellent and took great pride in their work. The end result has given us a fantastic room that we can use all year round.
I would have no reservations in recommending this company for any future projects.
The Fenestration Network works differently from most window and door companies. We’re an independent, owner-managed business built on communication, integrity, and genuine expertise. We partner only with proven manufacturers and brands we know and trust that will enhance your home with better security, energy-efficiency and style.
With our White Glove Service, we manage every detail — from advice and quotation through to survey, installation, and aftercare. The result is a complete, fully coordinated service that ensures peace of mind and the highest standards every time.
Project Details
1 no. 4 Pane Aluminium Bifold
1no. 5 Pane Aluminium Bifold
1no. Aluminium Door and Window Set
RAL9005 JET BLACK Internal & External
Black handles, toughened safety glass, trickle vents and cills.
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