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Black Aluminium Bifold Doors

Black Aluminium Bifold Doors

Klosen / Aluminium Windows and Doors / Black Aluminium Bifold Doors

open bi-fold patio doors with dining table and chairs
garden table and chairs with parasol on decking next to patio doors
folding doors open onto patio area


Blur the line between the indoors and outdoors with our stunning range of black aluminium bifold doors. Their wide opening aspect allows you to enjoy your garden from the comfort of your living room – perfect for entertaining or enjoying those long summer evenings.

Incorporating the very latest technology for optimal thermal and acoustic performance, our doors are designed to keep your energy bills low. They’re built to last, too – each one comes with a 10-year warranty. Download a brochure to find out more or request your free quotation today.

Why Choose Aluminium Bifold Doors?

If you want nothing but the best for your home, aluminium bifold doors are an obvious choice. Premium products through and through, they’ve been designed to outlast conventional wood and uPVC items; aluminium won’t rust, corrode or crack like most other materials.

And because of the strength of aluminium, the door frames can be made extraordinarily thin. The result? More natural light will find its way into your home, creating a new-found feeling of space and serenity.

Their 95% opening aspect makes them ideal for summer entertaining – and you won’t have to worry about carrying out regular maintenance: a quick clean every now and then will suffice. That’s the beauty of aluminium.

Brands We Work With

We have more than 25 years of experience in the industry, and specialise in aluminium windows and doors. Using that experience, we’ve handpicked the very best products from top brands like Senior Architectural Systems and Cortizo. Discover more about them below or download a brochure to explore their full range of doors

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Senior Architectural Systems Logo
Cortizo Logo

Our Customer Reviews

Great Price & Quick Delivery

This company have been amazing and came to our rescue when another company let us down repeatedly over a period of 4 months during our building work. We got a great price, a quick delivery time and the same product but this time with lovely fitters who knew exactly what they were doing. Now we will will have a warm house for christmas HOORAY !! We went for 3 large sliding doors and the quality of the product is excellent . Many thanks to Audrey Cieran and the team I would recommend highly
- Esther Young


Delighted with the product and the service provided by Klosen. The installation team were excellent and very helpful.
- Sara Hyem

Very Happy

We’ve been very happy with the work Klosen recently completed for us. They installed a variety of windows and sliding doors for us on our new build project. All of the information we requested early on was provided promptly and they were great with our architect. Very happy with the end result and the colour they helped us chose.
- Sarah Munton


Spanish firm Cortizo is also no stranger to innovation. Specialising exclusively in aluminium products, it continually pushes the boundaries of what’s possible, creating cutting edge designs that keep competitors on their toes.

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Bi-Fold Specifications:

  • Max Sash Width: 1200mm
  • Max Sash Height: 3000mm
  • Max Sash Weight: 120Kg
  • Glazing Thickness: 25mm – 45mm
External view of timber slimline bifold doors

10 Year Guarantee

We offer a 10 year guarantee on all aluminium profiles and 25 years for the powder coating element

Thermal Efficiency

Stay warm in the winter and cool in the summer whilst cutting down on energy bills

Complete Flexibility

Our team are flexible throughout the entire process, including the design and installation of windows

25+ Years Experience

Klosen have over 25 years experience working with designers, architects and homeowners

Senior Architectural Systems

Based in the South Yorkshire city of Doncaster, Senior Architectural Systems is a world-renowned innovator with a string of industry firsts to its name. Most notably, the company was the first to introduce a polyamide thermal break, delivering vastly improved thermal performance.

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PURe® FOLD Specifications:

  • Max Door Leaf Width: 1000mm
  • Max Door Leaf Height: 2616mm
  • Max Outerframe Width: 6000mm
  • Max Outerframe Height: 2700mm
  • Max Weight Per Door Leaf: 100Kg
  • Glazing Thickness: 28mm – 48mm
Hambleton Project


Klosen is one of the UK’s leading suppliers and installers of aluminium windows and doors. We’ve been trusted to work on all kinds of incredible projects over the years, and this show-stopping dream home in Lincolnshire is certainly up there with the most memorable of them. The Dutch barn-inspired property benefited from Cortizo doors and windows throughout, providing the perfect finishing touch, and would later go on to be featured on Grand Designs!

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Areas We Cover

We typically complete installations within a 60-mile radius of our headquarters in Market Deeping, Lincolnshire. Destinations we cover include Peterborough, Bourne, Stamford, Huntingdon and London.

Why Choose Klosen?

  • Over 25 years of experience
  • Five-star reputation
  • 10 year guarantee on all work as standard
  • No project is too big or small
  • Experience working on high-profile projects, including a Grand Designs home and the ABBA Arena in London
Request a Quote


Do your black aluminium bifold doors come with a guarantee?

Yes, all of our windows and doors come complete with a 10-year warranty as standard.

Do you offer any other colours?

Besides black, our doors are available in white, grey and a multitude of other RAL colours.

How soon will you be able to carry out the installation?

Generally, the lead time from us issuing a quote to the installation being completed is around 5-6 weeks, although this may vary depending on the style of door you choose.

Get in touch with us today to receive your free quotation!
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