Aluminium Bifold Doors
Slimline aluminium bifold doors that fold a whole wall of glass aside for garden openings, extensions and renovations.
We confirm the appropriate product route per project at quote, based on the opening, drawings, performance target, glass and finish.
Lead time confirmed at quote, never a guess. Pricing per project, never a stock figure.
All product categories →
Fabricated in Haydock, St HelensTrade-only supply from our own workshop.
Trade-firstInstallers, builders, architects, specifiers, joiners and commercial teams.
Quote-confirmed specificationProduct route, performance targets, glass and finish are confirmed per project.
Fabrication record
What aluminium bifold doors can actually be built to
These are the limits the factory works to, taken from the fabrication data for the system we make this product in. Premium routes in the same family reach better thermal and acoustic figures than the ones below, and are quoted where the project calls for them. Either way this is the envelope, not a quotation: the achievable figures for your opening are confirmed against your drawings and a survey.
| Frame sightline | 70mm |
|---|---|
| Panels per run | 1 to 7 |
| Leaf width | 350 to 1200mm |
| Height | 400 to 3000mm |
| Maximum leaf weight | 130kg |
| Glazing unit | 22 to 40mm |
| Glazing options | Double |
| U-value from, this system | 1.2 W/m²KUw table, lowest tabulated door U-value, achieved with Ug 0.7 glass |
| Security | PAS24 |
Configurations available
- Folding/sliding door
- open-in & open-out
- traffic door
- slave doors
- flush threshold
- up to 7 panels per run typical
Tested performance
| Tested size | Air permeability | Watertightness | Wind resistance |
|---|---|---|---|
| 4120 x 2640mm | Class 4 (600 Pa) | Class 9A (600 Pa) | AE2400 (2400 Pa) |
Classified on one tested mock-up. A class is achieved at a size, so this is not a guarantee for every configuration. The classes that apply to your opening are confirmed at quote.
Any security rating above is the tested performance of the system, held by the system manufacturer. VitrineAlu fabricates to the tested configuration and holds no certification of its own. Evidence for the configuration you specify is issued at quote.
In place
Aluminium Bifold Doors we have made
Design tool
See your aluminium bifold doors to scale
Use the concept visualiser to explore approximate size, opening, glazing, finish and detailing before a quote request. It is a discussion aid, not a production drawing or evidence of technical suitability; current project review confirms the selected aluminium bifold doors route.
Trade accounts only. Apply for one, or send drawings for an estimate instead.
For homes
Love these for your home?
VitrineAlu supplies through the trade. Send a referral request and we will review the product route before any installer handoff, and your details are only passed on with your consent. Your installation contract and warranty remain with the installer you choose to proceed with.
Specification
Aluminium Bifold Doors
- Sightline
- 70 mm
- Glazing
- 22-40 mm
- Leaves
- up to 7
- Security
- PAS 24 route
- Status
- Capability, confirmed at quote
- Thermal
- Whole-door U-values from 0.9 W/m²K where specified
- Size and Weight
- Leaves up to 1.2 m × 3.0 m at up to 130 kg each, runs up to 14 leaves where specified
- Security
- PAS 24 tested-security routes (incl. PAS 24:2025)
- Glazing
- Double or triple glazing, 22 to 46 mm sealed units, project-specified
- Finishes
- Full RAL, dual-colour and anodised-style routes
- Configurations
- Open-in / open-out, traffic-door, 2 to 7 leaf splits, 20 mm thermally broken low-threshold option
- Weather
- Air permeability Class 4 at 600 Pa, watertightness Class 9A at 600 Pa, wind resistance AE2400 at 2400 Pa, cyclic operation Class 1 at 50,000 cycles, classified on a 4120 x 2640mm tested mock-up
Figures are achievable capability for the system, not a quotation. The route, glass and hardware that deliver them are confirmed per project.
Request current test evidenceFaster quote
What to send
Send these and the route can be confirmed without a back-and-forth.
- Opening width, height, panel count and stack direction.
- Whether a traffic door, low threshold or split stack is required.
- Glass, colour, security and thermal target for final specification.
How we specify
The right product route is chosen per project
Exact specification (U-value, sizes, weights, security class, finish) is confirmed per project at quote, selected to suit the trade brief.
It means you lead with the outcome: light, security, clean sightlines, usable openings, buildable details and a specification that suits the drawings.
More on how routes are specified: security and PAS 24 routes and energy efficiency and U-values.
Choosing between door types? See bifold vs sliding doors.
Common questions
How wide can an aluminium bifold door open up?
Aluminium bifolds fold flat against the reveal, clearing the full span. Runs go up to 14 leaves where specified, with individual leaves up to 1.2 m wide and 3.0 m tall at up to 130 kg each. Clear opening depends on panel count and weight. Confirm the figure for your structural opening at quote.
What panel split and maximum panel sizes should I specify?
Aluminium bifolds run splits from 2 up to 7 leaves, folding left, right or from the centre. Each leaf reaches up to 1.2 m by 3.0 m at up to 130 kg, capped by glazing weight. Glass runs 22 to 46 mm, double or triple. Heavier glass cuts leaf size, so set the split against glass at quote.
Can a bifold have a traffic door and a low threshold?
Yes. The traffic door is an access leaf that swings like a single door for daily use, so the whole run stays folded. Pair it with the 20 mm thermally broken low-threshold option for a near-level, pram and wheelchair-friendly crossing. Weather is rated to air permeability Class 4, so weigh exposure at quote.
How secure are aluminium bifold doors?
Aluminium bifolds carry multi-point locking and can be specified to PAS 24 tested-security routes, including PAS 24:2025, with laminated glass options. Hinges, shootbolts and the traffic-door lock engage on closing, durability tested to 50,000 cycles. See security for the routes, then confirm locking and glass at quote.
What finishes and U-values can I specify, and can homeowners buy direct?
Bifolds come in full RAL, dual-colour and anodised-style finishes, with whole-door U-values from 0.9 W/m²K where specified. Confirm the whole-unit Uw at quote. We supply trade only; homeowners are routed to vetted installers via find an installer. Trade buyers request pricing at quote.
Work with us