ALUMINIUM
BIFOLD DOORS
Visofold 1000 Slim System for UK Trade Installers
High-Performance Aluminium Bifold Doors for Trade Projects
Aluminium Bifold Doors using the Visofold 1000 Slim system are supplied by Warmer Roof exclusively to UK trade installers, builders and fabricators. The system is suited to extensions, garden rooms, conservatory conversions and other residential and light commercial projects where large glazed openings and slim sightlines are required.
Designed for demanding trade applications, the Visofold 1000 Slim combines slim 122mm sightlines with thermally broken aluminium profiles, PAS24 security testing and a range of configurations and threshold options. This gives installers flexibility when specifying aluminium bifold doors for different structural openings and project requirements.
The system is also designed with fabrication and installation efficiency in mind. Integrated gaskets and Smart’s Quick-Glaze beads help simplify component handling and glazing, supporting consistent finishing across individual door sets and larger trade projects.
For guidance on the practical considerations involved when installing bifold doors, see our guide to common bifold installation challenges.
Simplified Fabrication with Integrated Gaskets
The Visofold 1000 Slim is designed to support efficient fabrication and straightforward on-site installation. Integrated design features help reduce component complexity while maintaining the thermal, weather and security performance required for replacement and new-build openings.
The sash profiles incorporate integrated gaskets, reducing the number of separate components required during fabrication and helping installers achieve consistent, clean finishes. The system also features Quick-Glaze beads, designed to simplify glazing and bead removal during fabrication and installation.
These practical design features can help streamline production and installation, particularly for trade projects involving multiple door sets.
Key Features of the VISOFOLD 1000 Slim System
-
Featuring Smart’s Quick-Glaze Bead UN3160G - with integrated gasket
- New sash profiles DV220G & DV221G
- Professional Grade Trade Bifold System
- Optimised for fast fabrication and on-site installation
- Quick-Glaze Beads designed to be easy to remove
- Ultra-slim 122mm sightlines for maximum glass area
- U-value of 1.5 W/m²K
- PAS24 security tested
- Weather tested to BS 6375 Part 1: 2009
Need a Price for an Active Project?
Get a guaranteed trade quote back same day.
Don’t make your clients wait. Send us your structural opening dimensions, and our technical team will calculate your exclusive trade pricing and email a detailed quote straight back to your inbox.
- Trade-Only Rates: Keep your project margins protected.
- Rapid Response: Quotes returned within the same day during normal working hours.
- Technical Review: We check your configurations and thresholds to ensure a hassle-free install.
Get a Fast Trade Quote
Specifications
Discuss Your Aluminium Bifold Door Projects with our technical specialists.
Call 01373 473 900
SLIMLINE ALUMINIUM
BIFOLD DOORS
Flexible Configurations and Specification Options
When closed, the doors provide a slimline glazed façade while allowing multiple panels to fold away to create a wide opening when required.
A thermally broken profile helps improve thermal performance while maintaining the structural strength required for larger glazed openings.
Security is supported by multi-point locking on the main sashes and shoot-bolt locking on floating mullions. Installers can also specify low or rebated thresholds according to project requirements and installation conditions.
The system supports both standard and non-standard configurations, with single- or dual-colour finishes and textured Sensations coatings available to provide additional specification flexibility.
Fabrication, Hardware and Finish Options
- Slimline profiles with reduced sightlines for a contemporary finished appearance.
- Square or rounded-edge main profiles to suit different project specifications.
- Multiple hardware options, including bespoke painted accessories.
- Lift-up handle option with an adjustable, one-piece keep for the locking mechanism.
- Smarts punch tooling used during manufacture for consistent profile fabrication.
- Mitred corner construction for accurate frame and sash assembly.
- Single- or dual-colour marine-quality powder coating available as standard.
- Qualicoat-approved painting through Smart Systems, supporting recognised standards for aluminium coating quality.
Aluminium Bifold Door Profile Sections
Threshold Profile
DV14 Outer Frame, DV220 Sash,
UN3160G Quick-Glaze Bead
Locking Profile
DV14 outer frame, DV220 Sash, UN3160G Quick-Glaze Bead,
DV76 Rebate
Head Profile
DV14 outer frame, DV220 Sash,
UN3160G Quick-Glaze Bead
Technical Specifications & Performance Data
The following specifications define the key dimensional and performance parameters of the Visofold 1000 Slim system, providing the information required for product specification, fabrication and installation.
Maximum sash dimensions, sash weight, frame depth, glazing requirements, security classification and tested air, water and wind performance are detailed below. These limits should be considered when establishing the required configuration and structural opening for each project.
For applications outside the stated system parameters, contact our technical team for advice on specification and suitability.
| Visofold 1000 Slim | Max Width (mm) | Max Height (mm) | Max Sash Weight | Glass (mm) | Sash frame (mm) | Frame depth (mm) | Security | U Value | Air | Water | Wind |
|---|---|---|---|---|---|---|---|---|---|---|---|
| When using DV220G & DV221G | 1200 mm (Sash widths over 900 mm require ACDV295) | 2500 mm (dependant on site conditions*) | 100 kg | 28 | 122 | 70 | PAS24:2016 | 1.5 W/m² K (1.0 centre pane) | Class 4 600 Pa | Class E 750 Pa | Class 4 1800 Pa |
For sizes outside these parameters, contact the Smart Technical Support team on: 01373 473 900
Aluminium Bifold Doors for Conservatory Conversions & Extensions
For Warmer Roof projects, the doors can be specified alongside upgraded roof and glazing systems to provide a coordinated approach to the refurbishment. This is particularly relevant where existing frames and glazing are removed as part of a wider conversion or where a new structural opening is being created.
The system’s range of configurations and threshold options provides flexibility when working with different opening requirements. For project-specific dimensions, structural requirements or installation considerations, our technical team can assist with specification before manufacture.
Manufactured For Trade Projects
Manufactured and supplied for UK trade projects, our aluminium bifold door systems are supported by an experienced technical team from specification through to manufacture. Our facility allows us to maintain control over the production process while providing trade installers with the technical support they need to specify and install the right system.
Trade Support for Aluminium Bifold Door Projects
Selling the specification is only part of the process. We provide trade partners with practical marketing materials to help you present bifold door options clearly to your customers and support the sales process from initial quotation through to specification.
When you work with Warmer Roof, you can access our Trade Starter Pack, including:
- Brochures: High-quality PDFs and printed brochures to help you present the system to your customers.
- Real Project Galleries: High-resolution project images to help you demonstrate finished bifold door installations to your customers.
- Simplified Option Sheets: Clear threshold and configuration guides to help you specify the right layout for each project.
FAQs – Aluminium Bifold Doors
What is the Visofold 1000 Slim system?
What configurations are available?
What U-values can the system achieve?
What threshold options are available?
Why specify these doors with a Warmer Roof?
What are the maximum sizes?
How secure is the system?
Can Warmer Roof help with product specification?
For project-specific technical support, call our engineering team on 01373 473 900 (ext 4)
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