Open-in / open-out, traffic-door, 2 to 7 leaf splits, 20 mm thermally broken low-threshold option
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.
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Council for Aluminium in Building memberProof shown in the footer.
Trade-firstInstallers, builders, architects, specifiers, joiners and commercial teams.
Quote-confirmed specificationProduct route, performance targets, glass and finish are confirmed per project.
Fabrication record
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
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
Design tool
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
VitrineAlu supplies through the trade. Send a referral request and we will review the product route before any installer handoff. Your installation contract and warranty remain with the installer you choose to proceed with.
Specification
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
Send these and the route can be confirmed without a back-and-forth.
VitrineAlu capability
Public values are stated as achievable capability, then confirmed against the selected project specification at quote.
The visible choice stays product-led while the final aluminium product route is selected to suit the opening, glass and finish requirement.
Trade buyers, specifiers, builders and joiners can send the practical details needed for specification. Homeowner requests are referral-only, with consent before details are passed to suitable installers.
How we specify
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.
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.
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.
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.
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.
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.
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