3, 4 or 5 panel · Black or White · priced instantly as you configure below.
Panels, configuration, size, colour, handle — price calculates instantly.
Cortizo is one of Europe's largest aluminium systems houses, based in Galicia, Spain. Their bifold door system is engineered for slim sightlines, smooth operation and long-term UK weather performance. Compared to budget aluminium, Cortizo gives you better thermal performance, stiffer frames at wider openings, and a powder-coat finish that holds up against salt air and UV.
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Made to measure in your exact size. Free delivery England & Wales.
Prices shown are the from price for each panel count at the smallest popular size. Use the configurator above for your exact size.
| Configuration | From price | Size range |
| 3-panel bifold (Black, White or Anthracite Grey) | £1,995 | 2100–3000 × 1900–2400mm |
| 4-panel bifold (Black, White or Anthracite Grey) | £2,660 | 2800–4000 × 1900–2400mm |
| 5-panel bifold (Black, White or Anthracite Grey) | £3,325 | 3500–5000 × 1900–2400mm |
All prices include 28mm toughened Low-E glass, standard threshold with sill, powder-coated frame and handle, multi-point locking. Free delivery across mainland England & Wales. 14-day lead time. Larger sizes priced at a higher tier — see the configurator for your exact quote.
| System | Cortizo aluminium bifold |
| Panel options | 3, 4 or 5 leaf |
| Popular leaf width | 700–1000mm per leaf |
| Height range | 1900–2400mm |
| Glass | 28mm toughened double-glazed unit, Low-E soft-coat inner, 4mm toughened outer + 4mm toughened inner with 20mm argon-filled cavity |
| Frame colours | Black, White or Anthracite Grey (RAL 7016) — powder-coated both sides |
| Handle | Black, White or Anthracite Grey — customer choice (defaults to match frame) |
| Threshold | Standard rebated threshold with sill |
| Opening direction | Outward (external fold) |
| Traffic door | Built into any config that folds entirely to one side (e.g. 3L, 4L, 5L) — no separate option |
| Lead time | 14 working days |
| Delivery | Free to mainland England & Wales (Highlands / NI — call for quote) |
| Lock | Multi-point locking on lead leaf |
| Compliance | Part N safety glass, Part L thermal performance |
Outside the popular range? If you need a size bigger than 5000×2400mm, corner bifolds, a custom RAL/dual colour, or a different glass spec, send us a custom quote request and we will reply within one working day.
Both materials work, but each has a clear sweet spot. The honest comparison:
| Aluminium (Cortizo) | uPVC bifold | |
|---|---|---|
| Frame thickness | Slim (~70–90mm sightlines) | Thicker (~120–150mm) |
| Maximum opening | Up to 6m+ wide / 2.4m tall | Usually capped around 4m / 2.1m |
| Panel count | 3, 4, 5, 6+ | Typically 3 or 4 |
| Frame stiffness | Stays straight at width without reinforcement | Needs steel reinforcement above ~3m |
| Colour options | Any RAL via powder-coat | Limited stock colours + foiled finishes |
| Thermal performance | Polyamide thermal break, modern Low-E glass | Naturally insulating frame, modern Low-E glass |
| Typical UK price (3-panel) | £1,995 – £3,000 | £1,200 – £1,800 |
| Best for | Kitchen extensions, garden rooms, anything 2.4m+ | Smaller openings, budget-led projects |
Short answer: under 2.4m wide and on a tight budget, uPVC is fine. Above 2.4m or where you want maximum daylight and slim frames, aluminium is the practical choice every time.
Most common application. A 4m or 5m run of bifold across the back of an extension, opening onto a patio. Anthracite grey is the runaway favourite here.
Brings the garden in. 3-panel sizes (2.1–3.0m) work well — fold one panel back as a traffic door for daily use, full-open in summer.
Works in any era of house. Modern look with anthracite or black; cottage or period homes often pick white.
Long, low openings (2.8–4.0m wide × 2.0m tall) suit 4-panel bifolds. The slim aluminium sightlines avoid blocking already-low light levels.
Two decisions: panel count (driven by your opening width) and which way they fold (driven by where the people and furniture are).
Prices start at £1,995 for a 3-panel bifold at the smallest popular size and go up to £3,625 for a 5-panel bifold at the larger end. Use the configurator at the top of this page for your exact price. Price includes 28mm toughened Low-E glass, standard threshold with sill and a black, white or anthracite grey powder-coated frame.
For openings over 2.1m wide, yes — slim sightlines mean more glass and more daylight than uPVC bifolds, and aluminium frames don't sag or distort under their own weight. The investment makes most sense for kitchen extensions, garden rooms and rear elevations onto a patio or garden where the door will be opened frequently in summer. Below 2.1m, a French door or single hinged door is usually a better-value choice.
Aluminium frames are typically 20–40% slimmer than uPVC, so you get more glass for the same opening. Aluminium is also stiffer, which lets it span wider openings without reinforcement bars. uPVC bifolds cost less but are usually capped at 4 panels and have thicker mullions. For openings under 2.4m wide, uPVC bifolds can be a sensible budget choice — above that, aluminium is the practical pick. The comparison table above has the full breakdown.
28mm toughened double-glazed unit. 4mm toughened outer pane, 20mm argon-filled cavity, 4mm toughened inner pane with low-E soft-coat. Both panes are toughened for safety as required by Part N for glass near a door.
We offer 3, 4 and 5 panel bifolds. Each panel count has multiple opening configurations: all panels folding one way (3L, 4L, 5L or their right-folding mirrors), or a split arrangement that meets in the middle (e.g. 2L+1R, 2L+2R, 3L+2R). Configurations that fold entirely to one side naturally include a traffic door — the lead leaf can open on its own for everyday use without folding the whole stack.
Popular range: 3-panel 2100–3000mm wide, 4-panel 2800–4000mm wide, 5-panel 3500–5000mm wide. All heights 1900–2400mm. Outside this range we still make them — submit a custom quote and we'll reply within one working day. Above 5000mm wide or 2400mm tall typically needs corner support or a structural engineer's input.
Measure brick-to-brick width at three points (top, middle, bottom) and use the smallest. Measure height on both sides and use the smallest. We deduct a fitting tolerance internally so don't deduct anything yourself. If you're not sure, give us your rough sizes and your installer's contact details — we'll confirm the final manufacture sizes before production starts.
Yes — bifold doors need an adequate load-bearing lintel or steel above the opening to take the weight of the wall above. Your installer or a structural engineer should size this based on the wall construction. We supply the doors only and don't specify or supply lintels.
Yes. The frame has a polyamide thermal break that stops cold transfer through the aluminium. Combined with the 28mm Low-E argon-filled glass unit, the overall door achieves U-values that comfortably meet UK Part L requirements for replacement doors. Heat loss in winter is no different to a modern uPVC bifold of equivalent glass spec.
Three stocked powder-coated finishes with the 14-day lead time: Black (RAL 9005), White (RAL 9016) and Anthracite Grey (RAL 7016). For bronze, sage green, dual-colour (different inside vs outside) or any other RAL, submit a custom quote — those add 2–3 weeks to the lead time.
14 working days from order confirmation to delivery, made to your exact size. Delivery to mainland England and Wales is included in the price. Highland Scotland, Northern Ireland, Isle of Wight and other remote postcodes need a delivery quote — call 0800 861 1450.
No, we are supply only. Bifold door installation is specialised work — a competent fitter will need to confirm the opening is plumb, level and properly supported above. We can recommend a local fitter in the London and Home Counties area if you need one. Allow roughly 1–2 days for installation depending on opening complexity.
Call 0800 861 1450 Mon–Fri 8am–5:30pm or Saturday 9am–1pm.
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