Alu-timber windows and doors

Whether you choose Rationel or VELFAC alu-timber doors, you get the best in Scandinavian design. Created with the modern world in mind, our highest-performing alu-timber windows and doors use sustainably sourced timber and recyclable aluminium.

Best of all, combining wood inside and aluminium outside creates the best-insulated windows and doors on the market and some of the longest-lasting. When you want to make a genuine and long-term investment in your home, alu-timber windows and doors, looked after, can last up to 80 years.

Scandinavian design, quality and longevity

Warm to the touch inside, durable and protective outside, composite or alu-timber windows and doors keep your home warm and better insulated on colder days, cooler and more comfortable in the summer. Available in contemporary or traditional designs with designer hardware, matching front doors, picture and floor-to-ceiling windows. We tailor your new glazing to your precise design, colour and requirements, all professionally installed in new or existing openings and with a quality guarantee. Of course, they’ll also meet and exceed current Building Regulations.

Even better with alu-timber windows and doors are designs and functions you don’t usually get with other types of windows. Curved head doors, easier creation of gables and shapes, and round opening windows are just some. You also get added functionality with options such as doors that tilt inwards for ventilation when you don’t want a fully open door. Alu-timber doors are bespoke, crafted residential doors suitable for the front, side or back of your home and balcony doors.

The most modern manufacturing techniques and colour technology also mean the woods come with a longer lifespan than aluminium and no longer are perceived as high-maintenance materials. Every part of these outstanding window and doors are designed to look great and last for decades, promising never to go out of fashion. Safety and security are built into the overall design, with your new glazing tested to extremes and the latest security standards. That is why alu-timber windows and doors are the first choice in eco homes, Grand Designs type projects.

Answering your questions about alu-timber and aluclad windows and doors

Aluminium outside, fine wood inside, warm to the touch and ultra-stylish. Some answers to popular questions about alu-timber windows and doors, also known as alu-clad and hybrid.

Are alu-timber windows worth it?

A genuine investment in your property, alu-timber windows or doors are long-lasting, highly energy efficient, warm, and luxurious. The nature of these windows, comprising two of the best window materials, also makes them stylish and unlikely to go out of fashion.

What is the difference between alu-timber and aluminium windows?

Aluminium windows have aluminium on both sides. Aluclad windows are predominantly timber windows with wood inside and aluminium outside. The benefit of aluclad or hybrid windows is the natural wood inside, with the protective and low-maintenance benefits of aluminium outside, not to mention looking slimmer outside than wood as well.

What are the disadvantages of alu-timber windows and doors?

They do cost a little more than other windows, but aluclad windows are built to last, timeless in style and often the choice of discerning customers. There are no disadvantages to these windows and remember. They are some of the most energy-efficient on the market.

How long do aluminium-clad windows last?

Rationel or Velfac are designed for a long lifespan of up to sixty years or more, depending on the product. Only steel lasts as long as aluclad windows.

What types of alu-timber products are available?

Windows, front doors, patio doors, screens and a fixed picture or floor-to-ceiling windows. Just some of the products available in this high-tech product with excellent specifications.

Three Reasons to Contact C&A Window Systems

experience you can trust

Our Process

Discover how we work

image of a lady in front of patio doors, advice article on CERTASS certification

Reynaers At Home

A trusted brand we are proud to work with

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


How to view our products

Reynaers At Home Partners

Proud to be part of the Reynaers at Home network, providing you with even more confidence in the quality of our products and our installation

Dependable Security

The latest generation locks, handles and product design promise you optimum security and are certified to the latest standards.

Your choice of colours

Extensive colour options ensure your windows and doors are tailored and individually designed, flawlessly blending with your home.

Meeting Building Regulations

Whether for new or replacement projects, you get dependable performance and your new glazing meets current Building Regulations.

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.