Composite Windows UK was established specifically to supply Rationel, VELFAC & Solarlux double and triple glazed composite windows and doors into the UK market. We are based in Portsmouth with an extensive showroom open for viewings by appointment.

Composite Windows UK specialise in high-end composite windows and doors. We have partnered with the DOVISTA Group to offer both Rationel and VELFAC brands. We also supply Solarlux folding and sliding doors.

Both the VELFAC and Rationel product ranges bring together the best of both worlds. They offer the durability and versatility of aluminium. They also offer the beauty and warmth of natural wood.

Rationel windows and doors have an iconic Scandinavian design that’s driven by detail. The result is something that truly stands out from the rest. Rationel windows are also available with both timber on the inside and outside.

The VELFAC 200 system aluminium/wood windows and doors deliver contemporary styling. The slim 54 mm sightlines maximise natural light. Opening and fixed lights have the same sightlines, providing a consistent aesthetic across window units.

Rationel and VELFAC products are designed for the future. Using sustainably-sourced timber and exceptional craftsmanship, they’re built to last for decades and to be enjoyed for generations. Both the Rationel and VELFAC brands have a commitment to high performance and thermal efficiency. As a result, they promise a cosy and optimal indoor climate every time.

Solarlux is one of the leading manufacturers of premium glass system solutions. Composite Windows UK offer Solarlux bi-fold doors and glass sliding doors. Solarlux are manufactured in Germany and have a commitment to high quality production. The company stands for excellent service and the desire always to be one step ahead.

Composite Windows UK forms part of the Westcott Group of Companies established in 2013. We have a vast experience of installing Rationel and VELFAC composite windows and doors throughout Hampshire, Surrey, Sussex, London, Oxfordshire and Berkshire.

We are proud to deliver excellent customer service. Our installers are highly trained, multi-skilled, clean and respectful of your property. As a result, our reputation for offering a superior service has grown rapidly. We pride ourselves on building strong and lasting relationships with our clients.

Our location ensures that we can cover Bath, Bournemouth, Brighton, Chichester, Guildford, Lewes, London, Oxford, Petersfield, Portsmouth, Reading, Salisbury, Southampton, Winchester.

Featured in numerous house and home publications, we thrive on challenging projects, unique designs and difficult access. We are always happy to talk about your dream project. Please don’t hesitate to get in contact with us here.