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Slimline Bifold Doors





Create an aura of space and elegance by installing prestigious slimline bifold doors into your home. Slimline bifold doors are folded open, adding a modern edge to your property with an exquisite, stylish touch. Turn a regular entranceway into one of sophistication and envy.

What Are Slimline Bifold Doors?

Slimline Bifold Doors are installed as a row of floor-to-ceiling doors with large glass panels set in slim aluminium frames. These folding glass doors can be pushed to one side to extend your living areas and create a seamless entranceway between your interior and exterior spaces.

Perfect for both private homes and commercial properties, bifold doors are the latest choice of architects across the UK, optimising views without compromising on insulation or security.
With a versatile range of frame colours and styles, we can provide you with a bespoke design that works with your property aesthetic.

With discreet bi folding designed to offer a 95% opening aspect, aluminium bifold doors don’t just open up your spaces and increase natural light exposure, they ensure you can make the most of your property in its entirety.
When winter time comes you won’t be cold either. Every bi-folding door segment is thermally insulated with snug, weather-tight gaskets that maintain the highest levels of draught-free insulation and noise reduction. Slimline bifold doors are strong, slim and irresistibly stylish.


As experienced slimline bifold door installers we’ll work with you at every step of the process to ensure you’re 100% happy with the outcome of your installation. Contact us today to learn more about the bifold doors we have on offer.

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    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


    Senior Architectural Systems

    Designed to exceed current and meet future legislation, the PURe bifold door range by Senior Architectural Systems offers unbeatable thermal performance and insulation and comes with a life expectancy of over 40 years. Available in leaf sizes up to 1000mm x 2616mm, these robust designs can take leaf weights up to 100Kg.

    These PURe bifold frames are available in two standard stock colours: RAL 9910 and RAL 7016. If you prefer an alternative look, we can also supply a metallic, textured or anodised finish.


    This bifold system is perfect if you want multiple doors installed together.


    Suitable for a single or double door, this bifold door system works with a swinging mechanism which gives you the option to open out or in.

    Senior Architectural System Brochure
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    Dewall engineers bespoke aluminium bi-fold door systems with slim sightlines, multiple threshold options and high thermal performance. Designed in Europe, these doors come with dual colour and special finish options for a bespoke aesthetic. With a maximum height of 3000mm and width of 1200mm, you can easily add floor-to-ceiling panels that optimise natural light levels and views in your home.

    Dewall Brochure
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    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

    Where We Work

    We install high-spec aluminium bi-fold doors across Lincolnshire, Cambridgeshire and London. With our Lincolnshire-based showroom, you can see the sophisticated range of designs we have to offer and choose the one that’s right for your building project. From Stamford to Covent Garden, we’re proud to supply luxury bi-fold doors that transform commercial and domestic spaces.

    To find out more about the products and brands we supply, simply download our informative brochure. To enquire about any of our slimline bifold door designs and how they could enhance your property, get in touch with our friendly team today.

    You can also get slimline sliding doors or slimline aluminium windows to go with your doors.


    What are bifold door sightlines?

    Bifold door sightlines refer to the distance between a pane of glass on one door and the pane of glass on a neighbouring door. It’s basically the width of the two door frames before you reach the glass panel. Slimline bifold doors are favoured for having slimmer frames which reduces the sightline and offers better views and increased levels of natural light.

    What is the maximum size for bifold doors?

    If you’re choosing one of our Senior Architectural Systems bifold doors the maximum size is 1000mm x 2616mm.

    What is a door leaf?

    The number of leaves refers to how many doors you have. With slimline bifold doors you can have single, double or multiple leaves.

    Our Latest Projects


    Aluminium Bi Fold, Doors, Senior Architectural Systems, Senior Architectural Systems Alivu, Windows
    Get in touch with us today to receive your free quotation!