Visofold 1000 Bifolding Doors
Discover Visofold 1000 Bifolding Doors, sleek, secure aluminium doors offering seamless indoor-outdoor living, thermal efficiency and modern design for any space.
Aluminium Bi-fold doors are the preferred option to transform a living space. Give yourself versatility and flexibility to 'open up' or 'go big'. Choose and change the size and feel of your rooms as you please with sliding bi-fold aluminium doors.
Key Features
Energy Rating A
Slim profiles – Attractive, slim-line profiles offer reduced sightlines
Fully compliant with latest building regulations
Dual colour possible
Lock mechanism available with domestic style ‘lift-up’ handle and an adjustable, one-piece keep.
Easy access low threshold accessibility option
Visofold 1000 Bi-fold doors are slide folding doors offering slim sightlines that are ideally suited to residential applications.
All profiles are extruded from 100% recycled aluminium billet and feature extended, chambered polyamide thermal breaks allowing Alitherm to achieve excellent thermal performance.
Product Information
The latest upgrade to the Visofold 1000 bi-fold door features a range of enhancements that deliver significantly improved U-values. The system also features a new track insert (DV100), with the polyamide section simply clipping into the track.
Applications Residential, retail, commercial
System Features
Finish Single or dual colour, marine quality polyester powder coat as standard
Thermal Performance 1.4 W/m²K with a centre pane of 1.2 W/m²K
Air Class 4, 600Pa
Wind Class 4, 1800Pa
Water Class E, 750Pa
Doc L 2010 Yes
Frame Width 102.5mm
Frame Depth 70mm – 82mm
Typical sight line* 133mm
Glass 28mm double or triple gazed units
Max o/a height (per sash) 2500mm
Max o/a width (per sash) 1200mm
Max sash weight 100kg
*Note: the U-values are calculated with foam insulation added to the profiles.
New Outer Frame Options
With a choice of two new rebated outer frames (DV17 and DV19N), a new integrated cill, and the existing low threshold option, this latest upgrade also includes the introduction of a DV225 heritage style sash to the range, aligning with Smart’s established range of heritage windows and doors.
Optional integrated ventilation.
The Visofold 1000 upgrade also includes optional 70mm UN3570 and 82mm UN3582 hooded trickle vent sections, which provide integrated ventilation.
PAS Approved
As well as improvements to the frames and thermal performance, Visofold 1000’s hardware and accessories range also features a number of significant enhancements, including PAS 24 approval for the door’s standard roller, the addition of new, heavy duty shoot bolt handle and enhancements to the gearboxes.
All in all an excellent job well done. The new bi-fold doors look really good!
Premium Security Fitted As Standard With Patented Active Cam Technology
The clever locking system of the Avocet ABS® diamond grade cylinder knows when it has been snap attacked and fires into action to create a robust barrier to entry. The patented Active Cam TechnologyTM is hidden deep within a solid Molybdenum cam which is 20% stronger than steel, and delivers ultimate resistance against a lock snapping attack and snap/twist manipulation. All of the snap technology is focused on the outside part of the lock only. This makes sure that maximum strength is given to the inner part of the lock – the part that has the job of securing your door.
Latest projects
BI FOLD DOORS
Bifold Doors – The Art Studio Addingham
BI FOLD DOORS
Wheelchair Accessible – TV Featured
SLIDING DOORS
Cross Hills – Spectacular Eco Friendly Design
Helpful guides
Low & Flush Thresholds For Aluminium Bi fold and Sliding Doors
Your detailed guide to getting the fabulous seamless appearance of a flush threshold.
COLOURS AND GLAZING
Our aluminium profiles are polyester powder coated by our systems suppliers using the very latest paint application techniques guaranteed for 25 years.
Fully compliant to the latest June 2022 building regulations our standard double glazing is the exceptional light transmitting, energy saving ClimaGuard® A+ low emissivity (Low-E) glass manufactured by Guardian Glass.
Why choose Marlin?
Reasons why you should expect 100% satisfaction.
Quality Control
We believe that our quality standards are unrivalled. Our manufacturing processes and activities are monitored with well defined controls and inspection procedures are performed by trained personnel.
Care
We respect you, your property and your project taking care over each detail from order to delivery to your post installation satisfaction.
Project Focus
Your project is important to us. We manufacture to your made to measure requirements so that we get it exactly right. See example case studies of our project work.
Frequently Asked Questions
If you require any support, please don’t hesitate to review our FAQ’s below or drop us a message on our contact form here
What are the maximum dimensions, panel options, and sightline specs?
The Visofold 1000 supports sashes up to 1 200 mm wide and 2 500 mm high, with a sash weight limit of 100 kg. The system features slim sight lines—about 133 mm typical, now reduced to 122 mm in the 2025 upgrade
How energy-efficient and weather-resistant is it?
Using polyamide thermal breaks and double‑ or triple‑glazed units (28 mm), it achieves a thermal performance of approximately 1.4 W/m²K, with standard glazing center pane U‑value of 1.2 W/m²K, compliant with UK Building Regulations. It meets air Class 4 (600 Pa), wind Class 4 (1800 Pa), and water Class E (750 Pa) ratings
What security and operational features does it offer?
The 2025 upgrade includes PAS 24‑approved rollers and top guides, a robust patented Active Cam locking mechanism, heavy‑duty shoot‑bolt handles, and new magnetic latches to stabilise panels in high winds. It’s also available with low‑threshold options (flush or rebated) for seamless access
Come and explore…
Aluminium Bi-fold Doors, Sliding Doors, Contemporary Glazing, Aluminium Heritage Windows and Traditional Steel Replacement Doors
