Bifold Doors with the Slimmest Sightlines on the Market 84mm

Innovative Slimline Bifold Doors

Our Smarts Visofold 6000 Aluminium Bifold Doors have the slimmest sightlines on the market at only 84mm. Designed to meet exacting technical specifications, they offer a solution that works well for both homes and businesses.

The configuration of the Visofold 6000 can be customised to fit the requirements of the project and set to fold externally or internally. This high-performance slide and fold door can be manufactured with a single entrance door at the side, or in the middle with a double entrance door.

Bifold Slimline Doors

The Dual Colour Solution

Fully Customisable Colour Combinations

Want a different colour on the inside and the outside of the doors? With the Visofold 6000, that’s not a problem! Choose a dual-colour finish, and you can select particular colours for the interior and the exterior of the bi fold door.

Our most popular colour combination is white on the inside to maximise the feeling of light and keep the room looking bright, with anthracite for the exterior to complement a garden.

Choose Your Size

The Smarts high quality roof lights and door systems designed to make the transition from inside to outside seamless.

Durable, Yet Stylish Bi Fold Doors

The Smarts Visofold 6000 is built on 35 years of experience by the UK’s leading manufacturer of aluminium windows and bifolding doors. With a commitment to the highest levels of manufacturing and design, you can trust the team to deliver, everytime.

Smarts Visofold 6000 Product Information

With Visofold 6000 Bifold Doors you can enjoy:

  • The slimmest sightlines on the market
  • Square or rounded end options
  • Various locking mechanisms
  • Excellent security

The Visofold 6000 is the ideal solution for residential and commercial projects where the goal is to maximise the feeling of open space. They can be used for large apertures to give a feeling of space and light, offering unimpeded views of your garden and beyond. The system is flexible and easy to operate and incorporates elegant design features to ensure a contemporary elegant façade.

The doors can be configured to fold internally or externally and sit flush against the frame when open. Each of the sashes are attached to a floating mullion and set to slide with a bottom roller and top guide. This makes it possible for us to offer ultra-slim profiles without compromising on ease-of-use or security.


The doors’ high-security glazing and state-of-the-art locking mechanisms give owners peace of mind. The doors feature multi-point locks on the opening sashes as well as shoot-bolts on the floating mullions.

Colour Range

The full, unmatched colour range gives you access to a huge choice of colours and finishes, with the option of colour-matched accessories.


The Visofold 6000 bi fold doors feature a polyamide thermal break for excellent thermal performance, delivering a high-strength, high-performance installation. The doors are manufactured in compliance with the Building Regulations Document L 2010 and can have recessed thresholds for or rebated thresholds depending on the requirements of the project.

The Visofold 6000 Slide & Fold Doors Offer:

  • Door sashes with concertina stacking
  • Smooth operation, so the doors are easy to open and close
  • The slimmest profiles on the market to maximise space
  • Integrated indoor and outdoor living

Visofold 6000 systems can be ordered on a supply-only or supply-and-fit basis.

Our experienced fitters have many years of experience in folding door installations, and we are proud of our high customer satisfaction ratings. Please note that the guarantees we offer will differ based on whether we fit the doors, or if you choose to do it yourself.

Bifold doors in standard colours with confirmed production sizes and full payment will be manufactured within two weeks. Supply-Only orders will be delivered on the following delivery to your area.

Bi folding doors in standard colours with a 10% deposit will be confirmed with the client and when approved by the client and balance paid, will be manufactured in two weeks. Supply-Only orders will be delivered on the following delivery to your area.

Non-standard colours can add two or three weeks to delivery and will be quoted on a job by job basis.

Installed orders will be installed within two weeks of production completion.

The above is an indication of planned times we will whenever possible, do our best to accommodate short delivery orders. During busy times of the year deliveries can be extended.

Delivery periods quoted are not the essence of the contract. We will do our best at all times to match the advised delivery.

These are the questions we get asked most frequently about our Visofold 6000 bi fold doors.

What are the different glass options?

Standard Double Glazing – You can choose from a wide range of glass options. The standard double-glazed units include toughened safety glass sealed units with Low-E values. They are filled with 90% argon gas and have a warm edge spacer-bar. The U-value of these units is 1.2 W/M²K.

Unglazed – If you would prefer, doors can be supplied unglazed, allowing you to source your glass from a different supplier. Please note that if you choose this option, you will need to comply with building regulations.

Staycool Solar Glazing – Staycool solar glazing offers protection from the sun’s direct heat and reflects glare, and in the winter offers thermal insulation with U-values as low as 1.1 so that your home stays warm. This industry-leading glass technology reflects 57% of direct solar heat and provides a reduction in glare of 35%. These benefits are achieved without using coloured glass, and in addition to offering you increased comfort, your flooring and furnishing will be better protected against fading and sun damage.

Other Options –  For better U-values, we offer other optional glazing specifications, including triple glazing and Krypton glass. Please get in touch if you would like to know more about these options.

All our glazing options exceed the current regulation specifications that stipulate a maximum U-value of 1.8 with our double glazing achieving a U-value of 1.5, and Staycool around 1.1.


Are the doors fully secure?

Yes, SMARTS Visofold 6000 doors come with a free upgrade to Ultion cylinders, the most secure cylinder on the market. The Ultion Cylinder offers double anti-snap protection, 2 attach locks, 11 pins (double the number of regular door locks), reinforced protection and 8 drill defences.


What colours are available?

Our wide range of colours means that you can choose the perfect finish for your bifold doors, whether you want a contemporary or a classic look. Door accessories colours can also be specified, so your handles and hinges either match or contrast with your doors. And there is a dual colour option so you can select a different colour for the outside and inside of your doors.

The aluminium bifold doors have a powder-coated paint finish. The most popular colours are RAL 7016 (Anthracite Grey), RAL 9010 (White) and RAL 9005 (Black). Because these colours are painted in such large quantities, they are the most cost-effective; but there are over 200 finishes to choose from including wood and metallic.


Why do you only offer aluminium?

We want to offer the best solution for your home. With the Visofold 6000 aluminium bifold door frames, we know that you’re getting unbeatable strength and durability. You can rest assured that your doors will remain in good condition for years to come.

Aluminium frames provide a low maintenance solution that incorporate a thermal break. This ensures that our bifold doors are effectively insulated against heat loss, helping to raise a home’s internal temperature and reduce the risk of condensation.


I’m not sure what I want, can I talk to someone?

Yes, we’d love to chat. Please give us a call on 0203 321 1955, or alternatively email us to arrange a visit to one of our conveniently located showrooms in Alcester or South Croydon.

  • Brand – Visofold
  • Material –  Aluminium Polyamide
  • Dual Colour – Yes
  • Thermally Broken – Yes
  • NBS Available – Yes
  • U Value 1.5W/m²K using 1.0 W/m²K centre pane
  • Air Class 2, 450Pa
  • Water Class 8A, 450Pa
  • Wind Class 3, 1200Pa
  • Document L Compliant Yes
  • BS 6375-1:2009 – Yes
  • Slide Folding Door Max Width (mm) 1000mm
  • Slide Folding Door Max Height (mm) 2200mm
  • Slide Folding Door Max Weight (kg) 100kg
  • Glazing (mm) 24mm, 28mm, 32mm or 40mm double or triple glazed units
  • Frame Depth (mm) 76mm or 82mm
  • Typical Sightlines (mm) 84mm

A Completely Flexible Bifold Door System; Customised to Your Needs

Get a solution that’s designed to meet your unique needs.

With our bifold doors you get:

  • The UK’s Most Popular Bifold Doors
  • Excellent Value
  • Glazing Options
  • Made to Measure
  • Different Thresholds
  • Over 200 Colours
  • High Security
  • Supply-Only or Fitted
  • Comprehensive Guarantee
Visofold 6000 Max U Value
Visofold 6000 Wind
Visofold 6000 Water
Visofold 6000 Sightline
Visofold 6000 Sashwidth
Visofold 6000 Sashheight
Visofold 6000 Documentl
Visofold 6000 Certifiedbs
Visofold 6000 Air
Visofold 6000 Max U Value
Visofold 6000 Wind
Visofold 6000 Water
Visofold 6000 Sightline
Visofold 6000 Sashwidth
Visofold 6000 Sashheight
Visofold 6000 Documentl
Visofold 6000 Certifiedbs
Visofold 6000 Air

Our Customers Love Us, You Will Too


At Smart’s Bifold Doors We Offer

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