BF-01
Two panels (2-0)
Two panels that fold and stack to one side.
Quote this layout: Two panels (2-0)Doors
Bi-fold doors
Bi-fold doors are a run of hinged panels that fold concertina-style and stack to one or both sides, opening almost the full width of the frame. A traffic door lets you use one panel as an everyday door without folding the rest.
See all 8 layoutsuPVC bi-folds are an affordable way to open up an extension. They do have thicker frames than aluminium, and there are limits on panel size. For very wide openings, or where you want the slimmest sightlines, aluminium bi-folds may suit better. We will tell you which fits your opening and budget.
Bi-folds need a level, square structural opening and a properly supported head, because any sag stops the panels folding smoothly. We check both at survey. Think too about where the stacked panels will sit. Folding outwards keeps the room clear, but the stack needs space on the patio.
Approved Document K treats glass in a door as a critical location up to 1,500 mm above the floor, so bi-folds use toughened safety glass. Replacement bi-folds also need to meet Part L, which for doors more than 60% glazed means a U-value of 1.4 W/m²K or better, or a Door Set Energy Rating of band C or above.
8 standard layouts
The layouts we fit most in UK homes. Every one is made to measure, and you choose the opening side, colour and glass. Need something different? Tell us and we’ll draw it for you.
BF-02Popular
Three panels (3-0)
Three panels folding to one side, with a traffic door for everyday use.
Quote this layout: Three panels (3-0)BF-03
Three panels (2-1)
Two panels fold one way and a single traffic door opens the other.
Quote this layout: Three panels (2-1)BF-05Popular
Four panels (3-1)
Three panels fold one way and a traffic door opens the other.
Quote this layout: Four panels (3-1)BF-06
Four panels (2-2)
Two panels fold each way from the centre.
Quote this layout: Four panels (2-2)BF-07
Five panels (5-0)
Five panels folding to one side, with a traffic door.
Quote this layout: Five panels (5-0)BF-08
Six panels (3-3)
Three panels fold each way, with a traffic door on each side.
Quote this layout: Six panels (3-3)Drawings are viewed from outside and are not to scale. Dashed lines meet at the hinge side. Sizes are typical starting points; we measure every opening at survey.
Why choose bi-fold doors
01
Wide opening
Panels stack neatly to open almost the full width.
02
Traffic door
One panel works as a normal door day to day.
03
Fold in or out
Choose the direction and stacking side to suit your space.
04
Low threshold
Options for a near-flush step onto the patio.
At a glance
Exact figures depend on the system and options you choose. We confirm them on your written quote.
| Configurations | 2 to 6 panels, stacking left, right or split |
|---|---|
| Security | Multipoint locking, shoot bolts on each panel |
| Glass | Toughened safety glass, A-rated options |
| Energy | Meets Part L for replacement doors (1.4 W/m²K or better, or DSER band C or above where more than 60% glazed) |
| Threshold | Standard or low threshold |
About bi-fold doors
How many panels do I need?
It depends on the width of the opening and how you want the panels to stack. As a guide, panels are usually about 600 mm to 900 mm wide. With an odd number of panels, one end panel can work as a traffic door while the rest stack to one side. We draw the options at survey.
Do bi-fold doors let in draughts?
They should not if the opening is square and the doors are adjusted correctly. Draughts and leaks usually point to a sagging head, an uneven threshold or panels that have dropped, and these can often be put right. See our patio and bi-fold door repairs.
Similar styles
Wide openings
Sliding patio doors
Large glass panels that slide on tandem rollers. No space needed for doors to swing.
- 4 layouts
- 2–4 panels
- Anti-lift locks
Garden access
French doors
A pair of glazed doors with no centre post. Opens wide onto the garden.
- 6 layouts
- No centre post
- Shoot bolts
Premium front door
Composite doors
A thick core behind a timber-look GRP skin. A solid, low-maintenance front door.
- 42 designs
- Thick core
- PAS 24 options
Free survey · written quote · no obligation
Get a price for bi-fold doors.
Send rough sizes and a few photos for an estimate. Or book a free survey and we’ll measure everything ourselves.