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Evolution Bi-Fold Doors

  • Incredible Design Flexibility
  • Advanced Performance
  • BS6375 Weather Tested
  • PAS24 & Part Q Approved

Designed and Manufactured in the UK

The Ultimate Evolution aluminium bi-folding door is different – and that’s by design.

Bi-Fold Doors Explained

It offers incredible flexibility. Defined by contemporary and ultra-slim aluminium sightlines, the Ultimate Evolution will span the largest openings, combining core structural integrity, advanced thermal performance and weather sealing.

But that’s not what makes the Ultimate Evolution unique.

It’s different, because it’s built from the ground-up - and around its hardware – something that guarantees through-life performance and effortless operation.

Bi-Fold Door Options

Available in a wide choice of configurations and colours. We can also work with you to design a door to complement the individual character of your property.


Anthracite Grey


Golden Oak

RAL Colours

Our mixing system allows a choice of colour options from the popular RAL colour range.

Download a Bi-Fold Door Guide

View more benefits, styles, colours and much more.


Bi-Fold Door Benefits

The Ultimate Evolution provides a seamless connection between your home’s indoor and outdoor spaces.

10-year guarantee

The Ultimate Evolution is fabricated to the most exacting standards. Designed to deliver exceptional through life performance, it’s supplied with a 10-year manufacturer’s guarantee built in.


Featuring multi-point shoot bolt locking mechanisms and the latest anti-tamper, anti-drill door cylinders, the Ultimate Evolution has also been fully tested to and exceeded, PAS24 and Part Q (Security) building regulations.

Thermal performance

The Ultimate Evolution system employs the very latest in polyamide thermal technology. This reduces heat loss by creating a thermal barrier between the outside and inside of frames, which combined with the latest energy efficient double and triple glazing delivers u-values (the measure of heat loss) as low as 1.4W/m2K, keeping your home warm and cosy.

Fully weather tested

The Ultimate Evolution is Severe Weather Rated including water, wind and air pressure testing. This means that your new Ultimate Evolution bi-folding doors will stand up to the very worst that the Great British Weather throws at them!

Guaranteed finish

The Ultimate Evolution is finished in a special marine-grade powder coating. This tough and highly durable polyester finish is guaranteed for 10-years.

Debar Hardware

Debar is a specialist bi-fold door hardware manufacturer with design innovation, manufacturing and distribution all carried out from our HQ in the UK.

Your Next Steps

Why choose us
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Got a question? Call us on 0116 403 0279

You can also email our team of experts on enquiries@customtradesystems.co.uk

Copyright 2024 Custom Trade Systems Ltd, All Rights Reserved. Registered in England & Wales No. 13185588 | VAT No. GB 437148488
Custom Trade Systems Ltd is an Introducer Appointed Representative (Financial Services Register No. 980326) of Phoenix Financial Consultants Limited (Phoenix). Phoenix is a credit broker, not a lender. Phoenix is authorised and regulated by the Financial Conduct Authority (FRN: 539195), and offers finance from its panel of lenders. All finance subject to status and credit checks.

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