Brands We Work With

C&A Window Systems Ltd is one of the UK’s leading manufacturers and suppliers of high-end aluminium glazing products, specialising in the manufacture and supply of bifolding doors, residential and commercial doors, windows, curtain walling and sliding doors.

Our window and door brands are at the forefront of our service to homeowners, the fenestration trade and our developer clients. Each is carefully chosen because they deliver on aesthetics, performance, security and energy efficiency.

Reynaers Aluminium

We are proud to be Premier Reynaers Aluminium manufacturers and approved Reynaers at Home Partners and with a brand new showroom showcasing the best in contemporary windows, bifolding and sliding doors and residential doors.

The Reynaers name is synonymous with only the best-engineered windows and doors. The Reynaers Aluminium collection focuses on creating energy-efficient, expertly made glazing that transforms homes and light commercial buildings.

Anodised Reynaers Ville Pedrali 14

Senior Architectural Systems

One of the leading British systems houses, Senior Architectural systems is widely specified by architects, developers and the wider construction sector. The range of Senior windows and doors, focuses on attractive, functional, affordable and reliable commercial glazing and products for dwellings.

Most noteworthy are Senior commercial glazing systems, firmly established in the UK market as some of the best shopfronts, screens, entrance doors and curtain walling.

Senior Architectural PURe Exterior 1 scaled

Contemporary VELFAC alu-clad

The long-established VELFAC brand is synonymous with contemporary slimline alu-clad windows, doors and commercial glazing systems.

VELFAC products combine fine natural pine on the inside with premium, coloured aluminium on the outside. A prestigious brand that has for years enhanced dwellings, commercial buildings and developments of luxury apartments and houses, VELFAC windows and doors deliver quality, slim sightlines and a desirable modern style.

Rationel wood & composite glazing

The comprehensive collection of Rational wood and alu-clad glazing systems offers both crafted all-wood windows designed for superior service life and incredible product quality. Also available from Rationel is a bespoke alu-clad range, again providing finely sustainable and responsibly sourced wood inside with durable and low-maintenance aluminium outside.

Rationel windows and doors deliver on most client requirements available as both contemporary and traditionally styled windows and doors for the discerning client.

grey trade supply alu-timber windows and doors in a new build house.


Korniche supplies an exceptional range of roof lanterns, bi-folding doors, and flat glass options for home extensions, new builds and renovation project. Korniche’s products are designed and engineered to perfection, ensuring a perfect blend of style and functionality.

The company won three awards at the National Fenestration Awards 2023, including Conservatory Product Of The Year (Korniche roof lantern), Bi-Folding Door Manufacturer Of The Year (Made For Trade, manufacturer of Korniche bi-folding doors) and Aluminium Fabricator Of The Year (Made For Trade, manufacturer of Korniche bi-folding doors & roof lanterns).

Customise Your products

A personalised touch

Glass options

Contemporary designs that enhance security and privacy.

Integral Blinds

An attractive addition delivering privacy and shading when you need it.


Peace of mind starts when you get in touch and lasts for years.

steve arundellsteve arundell
13:43 02 Nov 23
Chris and Andy listen to what we wanted and their team then delivered in spades.Great company well worth the effort to contact.
ArBa InstallationsArBa Installations
22:23 20 Dec 22
Posting from the view of an Installations company, C & A have always been a pleasure to deal with. Their process is very thorough and products are top quality. We use them for all our commercial doors and would highly recommend all their products and them as a company.
Paul DillonPaul Dillon
14:17 23 Nov 22
Great service. Top products. Thank you. C&A
Alfie TonerAlfie Toner
13:43 21 Nov 22
Great company to deal withQuick quotesPleasant staffGreat productsGreat customer supportDefinitely recommend
22:50 12 Jun 22
Couldn’t recommend this amazing company enough from start to finish the professionalism have been second to none. The quality of the work undertaken shows how much C&A take pride in there work. Thank You again
Gary WoodhatchGary Woodhatch
11:11 11 Mar 22
Have been dealing with Andy and Kim in the main at C&A windows for a few months now and the service overall has been great, quick quotes, lead-times inline with expectations and well presented and packaged goods. Great responsive aftersales assistance when called upon. Would recommend C&A for sure.
richard newellrichard newell
07:44 11 Mar 22
Always a pleasure to work with the people at c and a, very good communication throughout the process and most importantly the product is excellent.Highly recommended.

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call us

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01787 477976

visit us

Book an appointment to visit our showroom.  
8am – 5pm Monday – Friday

Unit 1, Lancaster Way
Earls Colne Business Park, Earls Colne, Colchester CO6 2NS

We are looking for new staff to join our team.