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Rationel windows combine safety, privacy and energy-efficiency features that help you make the very best of your home
Rationel SECURE
Our windows are built with security in mind. To see this in action, watch the video available on the Rationel website. Additionally, the video demonstrates the rigorous testing and quality standards that ensure your safety.
Rationel OBSCURE
Rationel panes are specifically designed to restrict the view into private areas such as bathrooms. Moreover, you can choose from six different types of glass to achieve the perfect balance of light and privacy. In addition, these options allow you to customize your space according to your preferences.
Rationel SAFETY
This glass holds together when shattered, reducing the risk of injury if someone falls into the pane. The toughened glass is designed to fall out of the sash and shatter into small, harmless pieces. Panes can be made of toughened glass, laminated glass or a combination of both.
Rationel FACADE
Used in buildings either to create a visually coherent facade or for special colour effects, Facade is well suited to storey divisions as well as ventilated and insulated panels, and is available in special colours on request.
Rationel SOUND
If your home is subject to environmental noise, our noise-reducing panes are for you. Panes feature two glass sheets that act as a break, dramatically reducing the movement of sound into your home and creating a peaceful environment.
Rationel SOLAR
Solar panes limit the amount of sunlight and heat coming into a building, depending on the light and heat shielding levels required. Consequently, this means significantly less energy will be required to cool hot rooms. In other words, solar panes contribute to greater energy efficiency. Furthermore, by reducing cooling needs, they can help lower utility costs and reduce environmental impact.
Secured by Design and Part Q
Rationel Windows and Doors
Our experience working with housing associations, community developments and commercial projects means the security and safety of Rationel windows and doors are second to none.
Additionally, Rationel windows and doors are tested and marked according to several national and European standards, as well as Secured by Design. Therefore, the frame, lock and hardware can withstand common burglary methods.
Part Q Requirements
To meet Part Q requirements, Rationel windows and doors must satisfy particular standards of robustness, use approved hardware and demonstrate proven security performance.
Please click here, to make an enquiry.
Three-point locking
Above all, the three-point espagnolette locking mechanism inhibits burglary; in fact, its design provides multiple secure locking points, which significantly increases resistance to forced entry.
Reinforced espagnolette
In particular, this reinforced espagnolette hinge increases the strength of all closing points, thereby improving the overall security of the window or door.
Reinforced screws
In addition to other security features, extra-strong reinforced screws significantly increase the strength of all hinges, thereby enhancing overall door durability.
Hook bolts
To enhance security, hook bolts in hardened steel, when combined with a reinforced front plate, offer strong resistance—even against severe attacks.
Laminated pane
Moreover, the length of time it takes to break a laminated pane significantly reduces the likelihood of a successful break-in, thereby discouraging even the most persistent burglar.
Letterbox
To begin with, this letterbox has an inner protective housing with a unique concealed hinge mechanism. As a result, it limits the opening of the inner flap, thereby providing maximum protection from so-called “fishing” burglaries.
Durability tests
All our windows are thoroughly tested for durability. In addition, a series of demonstration videos is available to view on the Rationel website, providing further insight into how our products perform under stress.
Air permeability 600Pa
Wind resistance 1600Pa
Operation 10.000 cycles
Water tightness 600Pa
Standard colours
If you can’t see the colour you want here, you can choose from the whole RAL classic colour chart. Non-standard colours may be subject to additional costs and lead times. Colours shown are indicative only.
Granite colours
Aluminium clad timber only.
G30 Warm grey
G20 Medium grey
G10 Light grey
G80 Black
G01 White
G60 Dark grey
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What Our Clients Say
See All TestimonialsMr P Rowe
We were very impressed with Composite Window’s professional service. They are knowledgeable about their range of excellent products and keen to match competitor prices. The showroom in Portsmouth is very useful for seeing the quality of the doors and windows and, of course, meeting the team!
Nigel and Mia
Luke and James came over this time on the last of our three planned installation visits to fit our final Rationel door and some requested extra restrictors. They checked all the rest of the VELFAC windows and Rationel sliders, adjusting a couple, and nothing was too much trouble. We have dealt with several folk at Westcott for our whole house install – and ranging from sales, through logistics, accounts to the Dovista rep on a couple of tech queries. Even with Jeremy Westcott directly to resolve something. Everyone is great – as are the products and the service. Couldn’t recommend more highly.
Maggi & Pat, Guildford
It has been a pleasure working with you and your team. Thank you for your assistance and patience throughout what was a less than straightforward installation.