Our Process

When you choose C&A Window Systems for your home improvement project, you have our assurance that our process provides a superior customer experience, from initial contact with our company to installation and aftercare. You also have the advantage of dealing with your door and window manufacturer directly, meaning we are in control of the entire process and don’t rely on external manufacturers. As a result, our smooth process ensures we help you complete your property renovation project on time.

Making getting new windows and doors easier and better

From start to finish, we are perfectly placed to help you get the very best products and service, with our refined process.

Visit our Showroom and Factory

When you get in touch with C&A Window systems, the first step is to visit our showroom. Here you can see our product range, and a member of our team is available to answer all your questions.

Available to view is our range of bifolding and sliding doors, aluminium windows, residential doors and a range of accessories and colour charts, letting you personalise your new windows and doors.

Quotation and Survey

Our quotations are professionally created and detailed, with full product specifications, payment terms and other information relating to your particular project.

Should you decide to proceed with C & A Window Systems, we will arrange a full survey of the property. This is irrespective of whether it’s existing openings for replacement windows or a newly built home or structural opening. Carrying out the survey also ensures we work with your builder or architect, which is essential for agreeing on features such as low or flush thresholds, tracks, or any specific design requirements. The survey also allows us to finalise other details, such as patterned glass in bathrooms, window handle colours and other important factors, before we start manufacturing your new windows and doors.

Once you are happy with all the information relating to your order, we ask you sign the survey, which allows us to commence manufacturing.

Making your stylish new windows and doors

We are proud to be an approved Reynaers manufacturer and a vetted and approved Reynaers at Home Partner. Manufacturing our own products means we better control the supply chain and the timescale required. Our factory has fully trained staff and uses the latest manufacturing methods and processes, ensuring right-first-time windows and doors with excellent fit, finish and build quality.

The lead times depend on the products you require, the colour of the aluminium profiles and the overall specification. We will keep you updated during the manufacturing period on the status of your order. Once your new windows and doors are ready, we will contact you to agree on an installation date.

Fitting your new glazing

Depending on whether we are replacing your old windows or doors or fitting into a new opening, we will agree on our installation date and any other details. We may need you to ensure our installers have a clear working area, especially when working inside your home. We use our own transport and our own delivery staff. Our products leave our factory and come straight to your home.

Your new windows and doors leave our factory protected and wrapped and are handled with care. The installation of aluminium is a precise process, and our installers have the skills to handle your new windows and doors, especially with larger bifolding and sliding doors, using bigger glass panels. Here we use the necessary handling equipment, and our installers are trained in safe working practices.

Completion and handover

Once your installation is complete, we will go through the installation with you. This is an excellent opportunity to ensure you are happy with our work.

Our installers will explain the operation of your windows and doors, and answer any questions you might have.

Your Guarantee and Aftercare

Upon payment of your final balance, we will provide you with your guarantee and CERTASS paperwork and are, of course, on hand to answer any questions you may have.

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.

Send us an email

Send us an email if you have any questions.


call us

Need to know more about our products? Call us, and a member of our sales team will help you.

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.