Bi-Folding DoorsPanoramic, Secure & Space Saving
Our aluminium bi-folding doors fold fully to one side, opening up to 90% of the wall for true indoor-outdoor living. With ultra-slim 120mm sightlines, PAS 24 multi-point locking, and A-rated 28mm toughened glass, they deliver panoramic views, security, and warmth. Up to 6m wide, 20+ colours, low threshold, 10-year guarantee.
What is a Bi-Folding Door?
A bi-folding door is a concertina door system where 2 to 7 panels fold and slide on a track to stack neatly to one or both sides. Unlike sliding doors, bi-folds open up to 90% of your aperture, creating a wide, clear opening. We make them in thermally-broken aluminium with slim 120mm sightlines, so you get a full glass wall when closed and a totally open space when folded.
Each panel is connected by robust rollers and hinges that glide on a stainless steel track, with a low 15mm threshold for seamless inside-outside living. When closed, multi-point hook locks, toughened 28mm Argon glass and triple seals give A-rated warmth and PAS 24 security. Available up to 6m wide, in 20+ RAL colours, dual colour and made-to-measure in the UK with a 10-year guarantee.
Aluminium Built For Big Open& Secure Life[
Slim frames, full 90% open, PAS24 locks & A-rated glass.
90% Wide Opening
Concertina fold stacks clear, 2-7 panels open up to 6m wide.
PAS24 Security
Multi-point hook locks + shoot bolts, Secured By Design.
Smooth Glide
Stainless steel rollers, lift action, one-finger glide for years.
Slim Sightlines
Just 120mm frame, more glass, panoramic garden views.
A-Rated Warmth
28mm Argon toughened, warm-edge spacer, U-Value ≤1.2.
Low Threshold
15mm low step, flush floor, safe for kids, wheelchair ready.
Quiet & Sealed
Triple EPDM seals block draughts, rain and street noise.
20+ Colours
RAL powder coat, dual colour option, grey outside white inside.
Two Systems.
One Seamless Opening.
Built for wide UK openings. Choose smooth-gliding uPVC or ultra-slim architectural aluminium both fold flat, both Secured by Design and made to measure in the UK.
MOST POPULARuPVC Bi-Folding Doors - 70mm System
- 90% Opening, Concertina Fold
- PAS24 Multi-Point Locking
- Low 15mm Threshold
- Most Cost Effective Bi-Fold
- Zero Maintenance uPVC
- 20+ Colours & Dual Colour
PREMIUM SLIMLINEAluminium Bi-Folding Doors
- Ultra-Slim 120mm Sightlines
- Stainless Steel Rollers - One Finger Glide
- 45+ Year Lifespan Aluminium
- Thermally Broken - A Rated
- Powder-Coated 150+ RAL Colours
- Supports Up To 6m With 7 Panels
Doors Built To Open 90% Of Your Wall , Backed By 20+ Years Fitting Bi-Folds
We don't just fit doors we engineer panoramic bi-fold systems that glide flat, seal tight, and turn any wall into an open garden. UK made, precisely installed, guaranteed for a decade.
Made to Measure in the UK
Every window manufactured to your exact size, not off-the-shelf. Perfect fit, zero compromise.
Profile 22 System
UK's most trusted 70mm system for thermal & weather performance. Engineered for British weather.
A+ Energy Efficient
Keep heat in, bills down, EPC ratings improved. Argon-filled double glazing as standard.
Secured By Design
Multi-point locking, internal glazing, police-approved security. Your peace of mind built-in.
10 Year Guarantee
Full guarantee on frames, hardware & installation. No quibble, no small print.
Made to Last, Zero Maintenance
Never rots, warps or needs painting. A quick wipe keeps them pristine for decades.
Where Are Bi-Folding Doors Used?
From kitchen extensions to penthouse terraces, bi-folds turn any wall into an open front. Their concertina fold, 90% clear opening, and 15mm flush threshold make them the choice for homes that want seamless indoor-outdoor living.
01 • ApplicationKitchen Extensions & Open Living
Create the wow factor where you cook and live. Fold back 3-6m to connect kitchen to patio.
- Flush threshold for indoor-outdoor flow.
- Traffic door for everyday access.
02 • ApplicationLiving Rooms & Garden Rooms
Replace a solid wall with glass. Slim 120mm sightlines give panoramic garden views even when closed.
- More glass, less frame.
- Full fold for summer opening
03 • ApplicationRestaurants & Commercial
Open your venue in seconds. Bi-folds create alfresco dining with PAS24 security after hours.
- Low maintenance for heavy use.
- Acoustic glass up to 38dB option.
04 • ApplicationBedrooms & Upper Floors
Juliet balcony effect with full security. Traffic door ventilation + trickle vents for night cooling.
- Secure night vent with shoot bolts.
- Obscure glass for privacy option.
05 • ApplicationHotels & Luxury Apartments
Uniform slim sightlines across every floor. Stainless rollers built for 200kg daily hotel use.
- Consistent facade sightlines.
- One-finger glide even at 6m wide.
06 • ApplicationSchools & Community Halls
Safe, wide access for events and classrooms. Low threshold, finger-safe gaskets, restrictor option.
- 15mm DDA low threshold.
- Reinforced rollers for high traffic.
Built To Open Your Home
90% Clear Opening
2-7 panels fold fully aside, up to 6m wide wall disappears.
Flush Threshold
15mm low track, seamless inside-out, DDA friendly, triple sealed.
Panoramic Glass
15mm low track, seamless inside-out, DDA friendly, triple sealed.
Secure Fold System
PAS24 hooks + shoot bolts, master door traffic handle, Secured by Design.
Colours to inspire
Aludec and Woodec deliver a step change in the application of PVCu colour finishing options.
Inspired by nature
Woodec
Woodec illustrates the appearance of real wood with a unique character combined with all the advantages of our excellent product range. This is what the new Woodec decorative foils offer. Not only is it difficult to distinguish visually from the natural material, but the Woodec foil also recreates wood very realistically to the touch, thanks in part to deep embossing and a matte top layer.
Inspired by style
Aludec
The attractive surface of Aludec decorative foils, distinguished by a unique fine-grained, matt surface with a similar finish to powder-coated aluminium, is a fabulous option that suits contemporary modern minimalist designs.
The new Aludec foils follow this trend, offered in seven attractive shades ranging from whites and greys, brown, jet black, anthracite, and a metallic finish.
Feature colours
Standard foil colours
All aluplast coloured foil finishes feature innovative technology which improves performance characteristics, providing a much longer life cycle of the surface finish.
Custom foil colours
Our Completed Projects
Bi-Folding Doors FAQs
Answers to the questions homeowners ask us most about uPVC, aluminium and heritage flush casements.
What size bi-folds can you do?
Up to 6m wide with 2-7 panels. Each panel max 1200mm wide, 2500mm tall. Made to measure to 1mm, aluminium or uPVC, UK manufactured.
How much opening do I get?
Up to 90% clear opening. Panels fold concertina to one side or split both sides. Traffic door included for daily use without full fold.
Is there a step or low threshold?
15mm low threshold as standard flush inside-out, wheelchair friendly. Triple seal keeps rain out. Optional rebated weathered threshold for exposed sites.
Are bi-folds secure?
Yes, PAS24 tested, Secured by Design option. Multi-point hook locks, shoot bolts top & bottom, toughened 28mm glass, internally beaded.
Are they warm enough for UK winters?
A-rated as standard. 28mm Argon double glazing, warm edge spacer, U-Value ≤1.2, thermally broken aluminium / 70mm uPVC. Keeps heat in, bills down.
How do they glide?
Stainless steel top-hung or bottom-rolling track rated 200kg per panel. One-finger operation, lift & glide gear, never sticks.
Colours and finishes?
20+ stock, 150+ RAL powder coat. Dual colour e.g. Anthracite grey outside, white inside. Matt, gloss or textured.
How long to install?
1 day for most 3-4m bi-folds. We survey, make, install and guarantee 10 years — frames, rollers, locks and installation.
Elevate Your Home with Windows & Doors
Get a free, no-obligation quote for casement windows in London. Made-to-measure, FENSA installed, A-rated & PAS 24 secure. Side-hung, French & bay options in uPVC, aluminium.