Alu-Timber Windows and Doors

VELFAC and Rationel are the UK’s leading brands of composite or alu-timber windows and doors, with C&A Window Systems being an approved distributor.

For trade supply alu-timber windows and doors, we provide a trusted and reliable service, helping you benefit from providing composite windows for your customers, and providing luxury and high-end windows for their property projects. Velfac and Rationel are also trusted and, together with our network of distributors, provide a trusted, local service to support our customers in building their dream home.

Sell innovative, stylish and sustainable glazing.

VELFAC and Rationel are also widely specified in the housebuilding and commercial sectors, giving you high-specification trade supply alu-timber windows and doors, competitively priced and providing a solution for today’s energy-efficient buildings and where your customers demand longer lasting and higher-performance windows. VELFAC is your go-to product for trade supply composite windows when the project brief requires contemporary styles and slimmer overall sightlines. Rationel offers both all timber and composite materials. Aura and Auraplus are the contemporary collection of doors and windows, Forma and Formaplus, the traditionally styled for cottages, character properties and sympathetic window and door replacements.

Even better, our trade supply alu-timber windows and doors are solutions to project requirements not usually available with all aluminium systems, giving our trade installers a competitive edge. Curved head doors, special shapes are easily provided with alu-timber windows. For patio doors, you get added functionality, including tilt and turn doors, sliding doors and matching front doors in solid, glazed or partially glazed designs.

always QUALITY products

Best Lead times

Reliable supplier service

The benefits of alu-timber, hybrid and composite doors are hard to beat. Sustainable and responsibly sourced, the woods used in VELFAC or Rationel trade supply alu-timber windows and doors provide the highest quality materials and colour finishes, with non of the high-maintenance associated with wood. Even better are the superior insulation and energy-efficiency credentials only available with a composite product, meeting today’s requirements for even better energy-saving windows and doors.

Frequently asked questions about alu-timber windows and doors

Get in touch for more information about Rationel and Velfac alu-timber windows and we will be happy to help with your project. Here are some answers to our popular questions about these insulated and high-specification windows and doors.

What is alu-clad or alu-timber

Also known as hybrid windows, alu-clad, as the name suggests, is aluminium that is cladding or covering the outside of the window. Inside is usually fine quality engineered timber such as Scandinavian pine, Meranti and other fine woods.

How do you provide your alu-clad windows and doors?

All our windows are provided fully fabricated, glazed and ready to fit. Doors and also provided fully glazed and ready to install, transport sizes permitting.

Are alu-clad windows better than timber?

All modern window systems in any material are built to established standards for quality, conformity, material type, colours and glass, tested for security and weather protection, and providing good U-Values. Timber windows today are high-performance products, but should you damage the surface coating, it is advisable to carry out a prompt repair. Alu-clad windows use low-maintenance aluminium outside so you benefit from the low-maintenance properties of aluminium, with the quality, warmth and insulation provided by solid wood inside.

Do alu-clad windows cost more than aluminium?

The price of windows and doors generally depends on many factors. Size, design, colour, glass and handle specifications, and even the location of the installation can all affect the price. Contact us for a quotation specific to your requirements.

Which window material lasts the longest?

The lifespan of any window depends on its location, intensity of use and whether it is in a residential or commercial building. Generally speaking, PVCu has the shortest lifespan, followed by aluminium, closely followed by alu-clad and steel windows, usually marketed as those with the longest possible lifespan. Aluminium has a lifespan of around 30+ years, and alu-clad systems companies claim a lifespan of around sixty years.

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.

Better windows and doors

Give your customers the superior products they expect with brand reputation, design, security and impressive energy efficiency.

Your project on track

Don’t let colour stand in the way of what you want to sell. Popular colours are held in stock, and special colours are available in as little as ten working days.

Aluminium Expertise

Our modern factory, manufacturing the leading systems for contractors and specifiers, ensures the best customer and site service.

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

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

01787 477976

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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.