Aluminium bifold doors, supplied and fitted across the Midlands
Made-to-measure Korniche aluminium bifold doors, supplied and fitted by Jim and Josh in Derby, Nottingham, Leicester and across the Midlands. No salespeople, no subcontractors.
From £3,000 2-pane·From £3,950 3-paneFitted, including VAT
Slim frames, big panes of glass and very little upkeep.
Why choose aluminium bifold doors for your home?
Aluminium bifold doors are made of several glass panels that fold back like a concertina and stack to one or both sides. Open, they join your living space to the garden, patio or terrace. Closed, slim frames and large panes let the light in while the heat stays in and the weather stays out.
They are popular for kitchen extensions and open-plan rooms, and as a replacement for old French or patio doors. We supply and fit Korniche aluminium bifolds, each set made to measure in your choice of colour and layout.
Why aluminium for bifold doors?
Slim and strong
Aluminium is strong, so the frames can stay narrow. Slimmer frames mean more glass, more light and better views, even when the doors are closed.
Hard wearing
Aluminium doesn’t rot, warp, swell or crack. The colour is powder-coated at the factory, baked on rather than painted, so it won’t peel or flake.
Warm
Polyamide thermal breaks inside the frame stop heat passing straight through it. With sealed double glazing, the doors meet current Building Regulations for thermal efficiency.
Low maintenance
Nothing to paint, stain or varnish. Wipe the frames with warm soapy water, and oil the rollers and hinges now and then.
Sizes
How many panels do your aluminium bifold doors need?
Most of the bifolds we fit are three panels, 2,200mm to 2,400mm wide.
It depends on the width of your opening. Each panel can be up to 1,200mm wide. Wider panels mean fewer frames and cleaner sightlines, but the best number depends on your opening and layout, and we will advise at the survey. Most of the sets we fit are three panels, which suits a typical rear extension or a replacement for old patio doors.
2 panels1,500–2,000mm opening width
A compact set, ideal for replacing a single door or a pair of French doors.
3 panels2,000–3,600mm opening width
The most popular set we fit. It suits a standard kitchen extension or rear opening, and has room for a traffic door.
4 panels3,000–4,800mm opening width
A good middle ground for a larger extension.
5 panels4,000–6,000mm opening width
A real statement when fully open, and with room for a traffic door.
6 panels5,000–7,000mm+ opening width
For large openings, where you want to open up a whole wall.
Aluminium bifold door options: traffic door, colour and hardware
Everything is chosen at the design stage, so your quote is for your exact specification.
Traffic door3, 5 or 7 panels have room for one
One panel opens on its own, like a normal back door, so you can step into the garden without folding back the whole set. It needs an odd number of panels, such as three or five. With an even number, the doors fold one way or split, without a traffic door.
Which way they foldLeft, right or split chosen with you at the survey
To the left, to the right, or split so some go each way. Which way suits you comes down to your room layout and where the furniture sits. Most of the bifolds we fit fold outwards, which keeps the stacked panels out of your room.
Colour and finishIncluded for the three standard colours
White (RAL 9910 gloss), Anthracite Grey (RAL 7016 matt) and Black (RAL 9005 matt) are the three standard colours, and anthracite grey is by far the most popular. Any RAL colour is possible, but it costs more and can add to the lead time. You can also have a different colour inside and outside, such as anthracite grey outside and white inside.
Handles and hardwareMatched to your frame at the design stage
Handles in black, white, grey, polished chrome or brushed stainless steel, to suit your frame colour. We help you match them at the design stage.
Glass and securityStandard on every set, PAS 24 available
Sealed double-glazed units with toughened safety glass, argon filled, with a warm-edge spacer bar. Multi-point locking with hooks, deadbolts and shootbolts, an anti-snap cylinder on the traffic door, and glazing beaded from the inside, so the glass can’t be taken out from outside. PAS 24 certification is available, and laminated glass for it costs extra.
We fit a standard threshold. It keeps rain and draughts out and lets the panels glide, and it leaves a small step, which is normal for external bifolds. Low or flush thresholds are not weather-rated, and manufacturers don’t guarantee them against water getting in, so we don’t fit them on external bifolds. If step-free access matters to you, tell us and we will talk it through.
Not sure which set suits your opening? Send us photos of it and we’ll suggest one.
Before we arrive
We fit bifolds. We are not builders.
What to arrange before your bifold doors are fitted
We fit your new doors into a prepared, structurally sound opening, so any building work needs to be finished before we arrive. We give your builder the exact opening size when you order.
Replacing French or patio doors in the same opening, with no structural work? That is much simpler. We take out the old doors, fit the bifold and seal it, and we can add small internal trims as we do with a composite door. Send us photos of your opening and we will tell you exactly what is needed. If you are making or widening an opening, these are the four things to have in place.
Building work to finish first
A supported opening
If you are widening an opening or making a new one, a steel lintel, RSJ or other support has to carry the brickwork above it. A qualified builder or structural engineer designs and fits it.
Brickwork square and level
The opening has to be the right size, square, plumb and level. We give your builder the exact dimensions when you order.
Building control for structural work
New or altered openings need Building Regulations approval for the structural work. Our Certass registration covers fitting the doors, not structural alterations.
Making good afterwards
The joint where the frame meets the brickwork still needs finishing. Your plasterer or decorator makes good inside, and outside if it is rendered. We leave the job clean, sealed and weathertight.
What’s included
One price, in writing, before you commit.
What’s included in the price of fitted aluminium bifold doors
Your bifold doors, made to measure, with frame and panels
Supply and fitting by Jim and Josh, never a subcontractor
VAT, and your old doors taken out
Double-glazed sealed units with toughened safety glass
Thermal breaks in the frame, and multi-point locking with hooks, deadbolts and shootbolts
Smooth-glide rollers, and trickle vents where Building Regulations need them
Certass registration: it meets Building Regulations, with a compliance certificate
A 10-year manufacturer’s guarantee on the frames, hardware and sealed glass units
Fitting doors since 2010 and a Rockdoor Trusted Installer since 2015: over 3,000 doors, each surveyed and fitted by us
Not included: building work to make or widen the opening, such as a lintel or brickwork, and plastering and decorating afterwards. Your builder does these before we fit.
Fitted prices from
2-pane bifold doors£3,000
3-pane bifold doors£3,950
4-pane bifold doors£5,050
5-pane bifold doors£6,100
6-pane bifold doors£7,450
Fully fitted, including VAT and Certass sign-off, for the three standard colours with clear double glazing. Bespoke colours, larger openings, non-standard heights and extra security such as laminated glass for PAS 24 all change the price.
A real price for your exact opening, not a ballpark.
How it works
About three to four weeks to make your doors, once you have ordered.
From your opening to fitted bifold doors
Day 1
Send photos of your opening
Your existing doors or opening, with the approximate width and height. For a new opening, your builder’s plans will do. No home visit needed to quote.
Within 24 hours
Your design and exact price
A quote by email for your exact opening and specification. No sales visit, no pressure and no sales calls.
3 to 4 weeks
Survey and manufacture
Happy to go ahead? A £100 survey deposit, which comes off your final balance. We survey when it suits you, evenings and weekends included. We measure the opening, check the frame and brickwork and confirm your final quote. Your doors take about three to four weeks to make, and we book your fitting once they are confirmed for delivery.
Fitting day
Fitted, sealed and checked
We fit the frame, hang the panels and fit the hardware, then check that the doors glide and lock. We seal the frame to the brickwork, show you how everything works, and your Certass certificate follows.
Jim and Josh are great. We've now had three doors fitted by them with bi-folds planned for the summer. Nothing is too much trouble.…Doors are fitted perfectly with everything left immaculate before leaving. Cannot fault them.
I could not be happier with my new front door, I absolutely love it. Jim and Josh were fantastic to deal with throughout the process.…Responsive to messages when I had queries, everything was easy. On the day of the install both Josh and Jim were organised and tidy. They had great attention to detail and I now have a beautifully fitted, beautiful new door that keeps drafts out and reduces traffic noise and feels very secure.
Prices start from £3,000 for 2 panes, £3,950 for 3, £5,050 for 4, £6,100 for 5 and £7,450 for 6, fully fitted including VAT and Certass sign-off. They are for the three standard colours with clear double glazing. The final price depends on your opening, colour and specification.
How long does it take to get bifold doors?
Your doors take about three to four weeks to make once you have ordered, and we book your fitting once they are confirmed for delivery. We quote by email within 24 hours first, with no sales visit needed.
Can I buy bifold doors supply only?
No. We only sell bifold doors fitted. Jim and Josh measure and fit every set themselves, and each set comes with a 10-year manufacturer’s guarantee.
Do I need a builder as well as a bifold installer?
If you are creating or widening an opening, yes. Structural work, such as removing brickwork and fitting a lintel, must be finished by your builder before we arrive, and plastering and decorating afterwards is down to your own trades. If you are replacing French or patio doors in the same opening, send us photos and we will confirm.
What is a traffic door?
A traffic door is a single panel that opens on its own, like a normal back door, without folding back the whole set. It is practical for everyday use, and it needs an odd number of panels: 3, 5 or 7.
What colours do aluminium bifold doors come in?
White, anthracite grey and black are included in our standard prices. Any RAL colour is possible as a bespoke option at extra cost, and you can have a different colour inside and outside.
Are aluminium bifold doors secure?
Yes. They have multi-point locking with hooks, deadbolts and shootbolts, an anti-snap cylinder on the traffic door, and glazing beaded from the inside so the glass can’t be taken out from outside. PAS 24 certification is available if you want it.
Are aluminium bifold doors energy efficient?
Yes. Thermal breaks in the frame stop cold passing through it, and the sealed double-glazed units are argon filled with a warm-edge spacer bar. Together they meet the current Building Regulations for thermal efficiency.
Do I need Building Regulations approval for bifold doors?
Yes, external bifold doors must comply with Building Regulations. We are Certass registered, so we self-certify every installation and you receive your compliance certificate directly, with no need to involve your local authority.
Do you fit aluminium sliding doors?
No. We fit aluminium bifold doors and composite doors. If you are deciding between bifolds and sliding doors, we are happy to talk through the differences.
Can bifold doors be used inside?
Yes, they can divide two rooms, such as a kitchen and a living room. Our focus is on external doors, so the specification and price for internal bifolds may differ. Send us photos and tell us what you need.
