The close up of the side of a house with a white window.

Rationel Windows

Windows can shape your outlook in more ways than one. From the way the light gathers at dawn to the flow of air during a hot summer, every element should complement your lifestyle. Let us introduce our two signature styles, AURA and FORMA. Both are available with double and triple glazing. The PLUS models feature timber frames with aluminium cladding, which opens up a new range of possibilities.

Four Images of windows and houses.

Rationel AURA and AURAPLUS

AURA personifies clean lines. The sleek, flat frame gives your window a flush finish for a truly modern, Scandinavian feel. This is our most popular profile, especially for a stand-out “grand design”. Optional glazing bars can increase the architectural elegance of this style. Made from sustainably sourced timber, your windows and doors will last for decades if looked after.

Choose AURAPLUS and we add aluminium cladding to the timber, which means maintenance becomes minimal and life expectancy rises by another 20+ years. The cladding comes in hundreds of colours and gives you the flexibility to have one colour inside your home and another on the outside. It can make a real impact and adds the durability to deal with the harshest of weather.

Four images of windows and houses.

Rationel FORMA and FORMAPLUS

Designed to complement traditional British architecture, FORMA brings a softer line to your windows and ensures your project blends with its environment. Beautifully styled in sustainable timber that will last for decades, the bevelled edges bring a homely feel. The colour palette is extensive, with the most popular choices can be seen here; you’ll be choosing the same colour inside and out.

Make it FORMAPLUS and the aluminium cladding gives you the option of another colour for the outside of your home – however, it’s unlikely you’ll want to cover up this beautiful styling. The cladded frame requires minimal maintenance and is extremely durable in all weather conditions. All styles are available with glazing bars, which particularly suit this style of window.

Types and openings

Hung, swung or guided: the drawings below show the range of styles available. Contact us for information on different style combinations.

Rationel Top Guided Window.

Topguided window

Elegant style that is suitable for all rooms. Simple, seamless opening function allows for effective ventilation when open, both above and below the sash. Clean look with no visible external hinges.

Min. width
358mm

Min. height
383mm

Max. width
1,798mm

Max. height
1,598mm

Rationel fully reversible window.

Fully reversible window

Multi-functional style suitable for multi-storey buildings. Sash can be turned to clean the glass from the inside. Comes with a child-proof opening limiter.

Min. width
553mm

Min. height
548mm

Max. width
1,598mm

Max. height
1,598mm

Rationel Top Guided Window.

Fixed light

Simple style that allows for optimal views. Ideal when you need maximum internal light and solar heat. Can be fitted with trickle-vents for ventilation.

Min. width
253mm

Min. height
253mm

Max. width
2,998mm

Max. height
2,998mm

Rationel side hung window.

Side hung window

Simple, stylish design with a seamless opening function. On larger windows, the friction brake allows the window to be fixed in any open position. Suitable as escape windows.

Min. width
353mm

Min. height
353mm

Max. width
948mm

Max. height
1,798mm

Rationel Side guided window.

Side guided window

Minimalist design that moves seamlessly, with no visible external hinges. When fully open the glass can be cleaned from the inside..

Min. width
453mm

Min. height
438mm

Max. width
998mm

Max. height
1,798mm

Tilt and Turn window.

Tilt and turn

Multi-functional style suitable for multi-storey buildings. Tilt function opens the top of the sash inwards for ventilation. Can be cleaned from the inside, and are perfectly suited as “escape windows” or emergency exits. Available in AURAPLUS triple glazed only.

Min. width
478mm

Min. height
438mm

Max. width
1,298mm

Max. height
2,400mm

Handles and accessories

Customise your windows with different handles and accessories.

Rationel Non locking handle.

1. Handle

Outward opening window and patio door

Rationel Key Locking handle.

2. Handle

With lockable child safety lock

Rationel Child Locking Handle.

3. Handle

With child lock

Rationel non locking handle.

4. Night vent position

Rationel non locking handle.

5. Restrictor

Click Vent.

6. Trickle vent

What Our Clients Say

See All Testimonials

Kyreon, Portsmouth

Five Stars

“From their varied showroom, helpful sales team to quality installers”

Keith, Erlestoke

We had a replacement glazed door fitted. The guys from Westcott and the office staff were very helpful.

Jonathan, Southbrook

Right from the start once we submitted drawings, letting us know delivery dates and install which was very good and the finished product was excellent. We opted for VELFAC 200, they look great.

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