Specification-led page

Aluminium Bi-Fold Doors

This page stays intentionally lean on imagery where product-accurate photography is still being expanded. The configuration, threshold, hardware, and brochure guidance below reflect the current product brief without borrowing mismatched visuals.

Doors

Aluminium Bi-Fold Doors

Aluminium bi-fold doors with flexible panel layouts, low-threshold options, and specification-led configuration for larger glazed openings.

  • Thermally broken aluminium bi-fold system
  • 2 to 7 panel layouts
  • Standard or low-threshold options
  • Broad powder-coated colour range
020 8500 9100
10YEARGUARANTEE
Assure certifiedNo subcontractorsFinance available

Personalise Your Door

Colours & Finishes

Frame Colour: Anthracite Grey

Standard colours

Dual colour available, different interior and exterior finishes on request.

Hardware Finish: Black

Handles, letterplates, and accessories available in matching finishes.

Made to measure. Confirm your colour and hardware choice during your free survey.

Aluminium Bi-Fold Doors in Anthracite Grey

Specification Choices

Set the bi-fold around panel count, threshold detail, and daily use

The aluminium bi-fold family stays specification-led here, using available reference visuals to support the layout, threshold, and performance decisions that actually affect the finished installation.

Made to measure

Panel count, stack direction, and traffic-door planning come first

The opening width and the day-to-day route through the doors normally decide the layout before finish choices are made.

2 to 3 panel layouts

2 to 3 panel layouts

Smaller openings can still use the bi-fold format where you want a cleaner hinged alternative to French doors but still want more of the wall to open up in summer.

  • Strong fit for narrower extensions
  • Open-in or open-out routes considered at survey
  • Can still include a daily-use traffic door

4 to 5 panel family openings

Mid-width runs are usually where bi-folds feel most balanced, giving a broader opening without pushing the panel stacks too far to one side.

  • Useful for most rear extension widths
  • One-way or split-stack formats available
  • Chosen around furniture and circulation

6 to 7 panel wider spans

Larger openings need a more deliberate panel and stack plan so the folded leaves, traffic access, and threshold detail still make sense in daily use.

  • Specified around wider glazed openings
  • Traffic-door planning becomes more important
  • Panel size and weight confirmed during survey

Technical Details

Specification and Options

Free Survey

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If this looks like the right fit, we can survey the opening, confirm the specification, and price it properly for your home with no obligation.

Free surveyFixed quoteDirect CII installation team

These aluminium bi-fold doors are built for projects where panel size, sightline width, and cleaner architectural detailing are the priority. That gives you a different specification from a basic folding door: broader finish choice, low-threshold options, and glazing build-ups tailored to the opening rather than a one-size-fits-all setup.

Key Specifications

Large panel sizes are supported without the bulky look of older folding-door systems

Double and triple-glazed configurations are available depending on thermal and acoustic targets

Class 4 air permeability, E750 water tightness, and C3 wind resistance on the tested platform

Anti-lift hinge design and PAS 24 option for higher-security specifications

Single and dual-colour powder coating across the RAL range

Low-threshold and standard threshold options to balance access and weathering

Core Information

Key information for Aluminium Bi-Fold Doors

The main performance, specification, and installation details that shape how this aluminium range works in practice.

Best For

Where this range fits best

Rear extensions with wider garden openings

Projects where low-threshold access and panel layout matter

Homes wanting slimmer folded stacks and broader RAL colour choice

Energy efficiency

Thermally broken aluminium framing paired with double or triple glazing allows this range to reach U-values from 0.8 W/m2K. That makes it a strong fit for extension work and larger glazed openings where aluminium is the right visual choice but the thermal target still matters.

Security

This bi-fold system includes multi-point locking, anti-lift hinge design, and a PAS 24 option where the project calls for a higher-security specification. Aluminium also gives you rigidity on wider or taller panels that would feel less controlled on a lighter-duty system.

Colours and specification

The key custom choices are panel count, stacking direction, traffic door position, threshold, and finish. Powder-coated aluminium covers standard favourites such as anthracite, white, and black, while still giving access to broader RAL colours and dual-colour inside/outside finishes.

Installation and guarantee

All CII aluminium bi-fold installations are covered by our 10-year installation guarantee, with final specification signed off after survey and installation.

Bi-Fold Working Details

Planned Around Thresholds, Hinge Stacks, And Everyday Access

Where the richer composite and uPVC pages are style-led, the bi-fold page is stronger when it stays focused on opening logic, access, and the physical details that affect daily use.

Broader folded opening

Broader folded opening

The main appeal of the bi-fold is opening up more of the wall, but the layout still has to respect panel count, stack direction, and how the room is actually used.

Traffic-door hardware planning

Traffic-door hardware planning

A separate daily-use access leaf often decides whether the final set feels convenient or cumbersome once the project is lived with.

Hinge-stack detailing

Hinge-stack detailing

The hinge line is one of the small details that affects how controlled and well-resolved the folded stack feels in person.

Low-threshold finish

Low-threshold finish

Lower-threshold routes can make the inside-to-outside transition feel cleaner, but they need to be agreed around finished levels and exposure.

How It Works

From Survey to Sign-off

Step 1

Survey

We visit, measure, and advise on the right configuration for your property.

Step 2

Install

Our directly employed team installs with clean, tidy workmanship.

Step 3

Sign-off

Final checks, handover, and Assure certification where required.

Next Step

Want a fixed quote from a real survey?

We will measure up, talk through finishes and installation details, and give you a clear quote based on the actual opening rather than a generic estimate.

Free surveyFixed quoteDirect CII installation team

Imagery Disclosure

Website imagery includes a mix of real installation photography and illustrative visuals created for web presentation. Product appearance may vary by size, finish, glazing, hardware and installation. For detailed product specifications and available options, please see the relevant brochure or contact us. Read the website disclaimer.

Checkatrade
Good price and hassle free. The doors look brilliant, exactly what we wanted. The fitters were friendly and left everything spotless.
Janet H., Brentwood
Checkatrade
Had a new composite front door fitted. Looks absolutely stunning and has made such a difference to the kerb appeal. Great communication throughout and competitively priced.
Louise B., Romford

Questions Answered

Common Questions

Where We Work

Essex, Hertfordshire & London

Based in Romford, we regularly work across Essex, North and East London, and into Hertfordshire. If you are not sure whether we cover your area, just give us a call.

Find Us

Our Workshop

Free home surveys available across our coverage area.

Areas We Cover

We Come to You

BrentwoodUpminsterHornchurchRomfordBasildonChelmsfordSouthend-on-SeaIlfordChigwellLoughtonEppingHarlowWalthamstowTottenhamEnfieldCheshuntBroxbourneHoddesdonHertfordWareBishop's StortfordSaffron WaldenBraintreeColchesterWithamBillericay

View all local area pages or not seeing your area? Get in touch and we will let you know if we travel to you.

Get Started Today

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Get a free, no-obligation quote from our team. We survey, advise, and install. All handled directly, no subcontractors.

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