3-Panel Cortizo Aluminium Bifold Door — Made-to-Measure
From £1,995 · 14 working day lead time · Free delivery over £1,450 · Black, White or Anthracite Grey
Sizes available: 2,100–3,000mm wide × 1,900–2,400mm tall.
Price range: £1,995 (smallest size) to £2,175 (largest size in popular range).
Configure size, colour & options →About 3-panel Cortizo aluminium bifolds
The 3-panel Cortizo aluminium bifold is made for openings of 2,100–3,000mm wide and 1,900–2,400mm tall. Frame is Cortizo's thermally-broken aluminium profile in your choice of Black (RAL 9005), White (RAL 9016), or Anthracite Grey (RAL 7016), powder-coated to a 14-day stocked lead time. Glass is 28mm toughened double-glazed with a low-E soft-coat inner pane and argon fill — A-rated thermal performance, both panes toughened for Part K compliance.
Common applications: kitchen rear extensions, garden rooms, dining rooms onto a patio. Typical of new single-storey rear extensions with a 2.4–3.0m opening. Pricing: from £1,995 at the smallest popular size, up to £2,175 for the largest size in the range. No VAT to add — Glazing Quoter is not VAT-registered, so the displayed price is what you pay.
Cortizo aluminium vs uPVC vs sliding doors
| Cortizo Aluminium 3-Panel | uPVC 3-Panel | Aluminium Sliding Door | |
|---|---|---|---|
| Frame depth (sightline) | ~50mm slim | ~70–90mm bulky | ~30mm ultra-slim |
| Maximum opening | Up to 3,000mm wide | Up to 4,000mm wide | Up to 6,000mm+ |
| Frame stiffness | High (no reinforcement bars needed) | Lower (mullion bars on wider spans) | High |
| Folds away when open | Yes — full opening | Yes — full opening | No (door slides behind fixed pane) |
| Glass area when closed | ~80% | ~65% | ~85% |
| Colour options (stocked) | Black, White, Anthracite Grey (14-day) | White, Anthracite Grey foil (3–4 weeks) | Black, Anthracite, RAL custom |
| Thermal U-value | ~1.4 W/m²K | ~1.4 W/m²K | ~1.5 W/m²K |
| Typical UK price (this size) | From £1,995 | From £1,496 | From £2,793 |
| Best use | Kitchen extension, garden room, rear elevation | Budget-conscious openings up to 4m | Wide patios where full opening isn't needed |
Cortizo aluminium suits most bifold projects above 2.4m wide. For narrower openings, uPVC is a sensible budget choice; for very wide openings (5m+) a sliding door is more practical.
Building Regulations & compliance
Part L (thermal performance) — Cortizo aluminium bifolds use a polyamide thermal break + 28mm argon-filled Low-E sealed glazing. Whole-door U-value typically ~1.4 W/m²K, comfortably below the 1.6 maximum for replacement doors.
Part Q (security in new dwellings) — multi-point locking on the lead leaf with anti-lift hooks meets the security spec for doors in new-build dwellings (PAS 24 equivalent on the locking hardware). Replacement installations don't require Part Q but get the same security standard by default.
Part M (access) — standard threshold has a rebated profile with sill (~25mm step). For wheelchair access or step-free thresholds (Part M-compliant), submit a custom quote — we can specify a low-threshold variant (different from the stocked configuration).
Part K (glazing safety) — every leaf is fitted with 28mm toughened double-glazed unit (4mm tough outer + 20mm cavity + 4mm tough inner with low-E coat). Toughened both panes by default because doors and side panels are critical locations under Part K.
How to install (5-step summary)
- Confirm the opening — plumb, level, with an adequate lintel above. Confirm with your installer or structural engineer before ordering.
- Order to your exact size — use the configurator at /bifold-doors.html. We make to your measurements; deduct nothing for tolerance.
- Prepare for delivery — ground-floor access, 2–3 person unload. Doors arrive crated.
- Fit the frame — packers, fixings (5 per side), external silicone. Frame must sit perfectly square.
- Hang and adjust — fit the gear, run the doors, adjust rollers and hinges. Allow 1–2 days for the full job.
FAQs
How much does a 3-panel Cortizo aluminium bifold door cost?
From £1,995 for the smallest popular size (2100×1900mm) up to £2,175 for the largest (3000×2400mm). Use the configurator at /bifold-doors.html to see your exact price for any size in this range. Price includes 28mm toughened Low-E glass, standard threshold with sill, your choice of Black, White or Anthracite Grey powder-coated frame, and multi-point locking.
What sizes can I order for a 3-panel bifold?
Popular range is 2100–3000mm wide × 1900–2400mm tall. Outside this range we still make them — submit a custom quote at /custom-quote.html and we reply within one working day. Above 5,000mm wide or 2,400mm tall typically needs corner support or a structural engineer's input.
What's the lead time and is delivery included?
14 working days from order confirmation to delivery. Free delivery to mainland England and Wales when the order is over £1,450 (which a 3-panel bifold always is). Highland Scotland, Northern Ireland, Isle of Wight and remote postcodes need a delivery quote — call 0800 861 1450.
What configurations are available for 3 panels?
3-panel bifolds come in three opening configurations: 3L (all panels fold to the left, lead leaf opens as a traffic door), 2L+1R (two left, one right), or 1L+2R (one left, two right). Configure inside-vs-outside view at /bifold-doors.html.
Do I need a structural lintel above a 3-panel bifold?
Yes. Bifold doors need an adequate load-bearing lintel or steel above the opening to take 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. The opening also needs to be plumb, level, and structurally supported before the door arrives.
Do you install bifold doors?
No, we are supply only. Bifold installation is specialised — 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.
4-Panel Cortizo Bifold
5-Panel Cortizo Bifold