Aluminium Bifold Door – Visofold 4000

Aluminium bifold door the Visofold 4000 offers unique slide and fold dual hollow aluminium system. The doors which sit in a rebated frame have an external curved shape with internal beading. Bottom wheels and top glider are safely concealed within a dedicated floating mullion with the door leafs being joined by a butt type knuckle hinge.

The Visofold 4000 is suitable for domestic and light, medium, heavy duty commercial applications.The folding door system with thermal break allows you to create large passages.The system is built up using a frame in which moveable parts or elements are placed in such a way that it is possible to fold the elements to the left or right.These elements or sashes are supported and hinged to a mullion.At the bottom the mullion is supported by a roller mechanism which slides along the sill profile while at the top, the mullion is guided by another roller mechanism.There are several possible combinations of elements and opening sashes.

Visofold 4000 Systems
Range Of Colours & Finishes

A wide range of colours and finishes are readily available, standard ranges of colours include White, Black and Anthracite Grey; you can choose from any RAL colour and finishes are available, there is also a range of exciting ‘Sensations’ metallic colours, which offer a really exclusive and exciting option to your new window.

Smart Door & Window Systems Brochures
Smart Door & Window Systems

  • Applications :

    This series of folding doors is mostly used in hotels and restaurants, stores and in private houses, in order to open a complete wall to create a larger space in the summer.The system is also interesting for conservatories to use as a screen you can open completely in summer times.


    Extruded out of aluminium-alloy AlMgSi 0,5 F22 according to DIN 1725.
    Tolerance according to DIN17618.

    Finishing :

    Electrostatic powder coating: According to the guidelines of APA-Qualicoat in most of the current RAL-colours. Possible to colour in wood structure to imitate different woods (Powder coated according to Qualicoat). All coatings will be delivered with a certificate of guarantee for 15 years.

    Anodisation:In satin or bronze colours with E.E.W.A./EURAS-Qualanod quality label.

    Thermal break : The profiles consist of 2 aluminium extrusions which are separated from one another by polyamide strips PA 6.6.25 reinforced with glass fibre. A gluing thread, rolled and pushed in together with the thermal break profile, ensures a strong adhesion after melting and flowing, when the profiles are heated in the hardening furnace.


    Built-in depth: outer frame 78 mm, sash 70 mm.
    Sealings: with extruded EPDM rubbers and PP-brushes
    Glazing: from 4 to 37 mm.
    k-value: 3.11 W/m²K
    Hardware: EUROGROOVE

    A large amount of combinations is possible with or without a walk-through door. Choice between a high or low sill profile. The low one allows you to level out the frame with the floor. Possible to make a side or upper lighting window in the same series with the same look. In the folding elements you can place another sash (e.g. top-hung window).

    Performance level according to STS 52.0:
    Air transmission: PA2
    Mechanical resistance to wind: PV2
    Watertightness: PE2

    Performance level according to UEATC:
    Air transmission: A2
    Mechanical resistance to wind: V2
    Watertightness: E2

    MaterialAluminium Polyamide
    Dual Colourdoor-features
    Thermally Brokendoor-features
    NBS availabledoor-features
    Max Width6500
    Max Height2400
    Max Weight80
    Weather Suitabilityfeatures-5-star
    Acoustic suitabilityfeatures4
    Thermal Suitabilityfeatures4
    Min Glazing4
    Max glazing38
    Security Ratingfeatures4
    Low Threshold Optiondoor-features
    Light Dutydoor-features
    Medium Dutydoor-features

  • Visofold Doors 1000-4000 Brochure
    KL Colour Guide Brochure
    Sensations Colour Guide Brochure

  • Smart Systems offer a range of doors suitable for public, new build, the architectural, commercial, and retail markets.The doors available are commercial hinged, commercial swing,patio, tilt and slide, slide folding, multi-track slide and automatic. Our doors are designed for use as open out or open in, single or double doors, internally or externally beaded with sidelight options for domestic and/or commercial applications.

  • We have over 30 years combined experience in the uPVC & Aluminium domestic and trade industry and we will happily advise you, and answer any queries you may have. Should you like a brochure posted to you, or should you need any help at all with selecting doors or windows, or assistance with choosing a conservatory please do not hesitate to contact us! We offer free no obligation surveys.

  • Free Impartial Advice. Free Estimates & Surveys – No hard sale no obligations.

  • Aluminium windowsOur Commitment 10 Year Guarantee on profiles, hardware and sealed units
    Aluminium doorsFree 12 month after sales service on all windows and doors (subject to inspection)
    Aluminium windowuPVC maintenance on existing products.
    Aluminium doorsIndustry Approved Installers of UPVC Doors, Windows & Conservatories
    Aluminium window casementOver 30 years combined experience in the glazing industry.
  • We operate from a factory unit which is 3000sq feet fully stocked, offering uPVC doors, windows and conservatories. Get in touch for double glazed and replacement windows, doors and conservatories.