Bi-folding doors
Fold away
an entire wall.
Aluminium and uPVC bifold doors, made to measure and installed by our own team. No subcontractors. No surprises.
- 0.8
- W/m²K U-value, as low as (Cortizo Bifold Plus)
- 2–14
- panels per configuration
- 1,200mm
- maximum panel width
- 3,000mm
- maximum panel height
Aluminium or uPVC?
Which is right
for your opening?
Aluminium is the premium choice: far stronger than plastic, so frames are slimmer and the glass is bigger.
Modern thermal breaks make today's aluminium doors highly efficient, and powder-coated finishes resist fading for decades. uPVC bifolds cost noticeably less and insulate well — a sensible choice for two- or three-panel openings.
If your opening is over three metres, or you want the slimmest possible frames, we'll usually steer you towards aluminium. Either way, you'll get prices for both.
Our premium system
Cortizo bi-fold doors.
Ultra-slim aluminium profiles maximise the glass, while advanced thermal breaks deliver U-values as low as 0.8 W/m²K. With PAS 24 security, configurations from 2 to 14 panels, a traffic door for everyday use and a level threshold option, they're designed for modern living.
Panels reach up to 1,200mm wide and 3,000mm tall — ideal for floor-to-ceiling openings.
Questions
Good to know.
Are aluminium bifold doors better than uPVC?
Aluminium offers slimmer frames, larger glass panels, more colours and greater strength on wide openings. uPVC costs less and insulates well on smaller spans. For openings over three metres or a premium finish, aluminium is usually the better investment.
How many panels can a bifold door have?
Most homes use between 2 and 7 panels, suiting openings from roughly 1.8 to 6 metres. Cortizo systems extend up to 14 panels. An odd number of panels lets you include a traffic door — a single leaf that opens like a normal door.
Do bifold doors need planning permission?
Usually not. Replacing existing doors or fitting bifolds into a standard rear opening typically falls under Permitted Development. Larger structural openings may need Building Regulations approval for the lintel and safety glazing — we handle compliance and certification as part of every installation.
Do you install outside Croydon?
Yes. From our Thornton Heath base we cover Croydon and the whole of South London, including Bromley, Sutton, Mitcham, Streatham and Wimbledon.
Free design consultation
Tell us about your project.
No pressure, no obligation. We'll talk through proportion, profile, colour and glass, then arrange a survey if you'd like to go further.
- Call020 3835 2583
- Mobile / WhatsApp07925 678210
- Emailinfo@4moonwindows.co.uk
- HoursMon–Fri · 08:00–17:30
Request received
Thank you.
A member of the 4Moon team will call you back to arrange your free design consultation. If it's urgent, call us on 020 3835 2583.