talk to an expert now 01295 270938

Rationel Windows

Why choose Rationel Windows?

Founded in Denmark in 1954, Rationel has been at the forefront of windows and doors production for more than 60 years.

With a reputation for outstanding quality and innovation, they are the perfect choice if you’re looking for:

  • Replacing old windows as part of a renovation or refurbishment
  • New windows as part of an extension

Our windows are designed to be at home in both traditional and modern builds, as well as homes that are inspired by Scandinavian design.

Designs styles

Our windows are designed in two styles:


I’d like to know more about Rationel Windows

    Key features of AURA and AURAPLUS

    The Aura is designed for modern and contemporary homes with its sleek, flat frame offering clean lines and a flush finish.

    AURA benefits from:

    • Double or triple glazing
    • Solid wood frame
    • Available in more than 200 colours
    • Meets Secured by Design standards

    AURAPLUS benefits from:

    The AURAPLUS is also designed for modern and contemporary homes, with the added benefit of being externally clad in aluminium.

    The benefits of AURAPLUS include:

    • Solid timber frame with external aluminium cladding
    • Double or triple glazed
    • Life expectancy of 83 years
    • Dual colour frames
    • Available in more than 200 colours
    • Meets Secured by Design standards.

    Key Features of FORMA and FORMAPLUS

    If you’re looking for a traditional window that complements British architecture, this is the right product for you.

    The designers have taken time to ensure the little details are not forgotten, including; bevelled edges and angled glazing beads.

    This window style is perfect for older properties.

    Key benefits of FORMA

    • Solid wood frame
    • Life expectancy of 60 years
    • Double or triple glazed
    • Bevelled edges
    • Angled glazing beads
    • Meets Secured by Design Standards
    • Available in more than 200 colours

    Key benefits for FORMAPLUS

    As well as the above, the FORMAPLUS benefits from:

    • Solid wood frame with externally clad aluminium
    • Life expectancy of 83 years
    • Dual colour frames for no extra charge

    Rationel Windows

    Timber/Aluminium Clad

    It’s all in the details

    Rationel windows have been designed with longevity in mind and for the most demanding locations in the world. They are one of the most popular windows and door manufacturers in Denmark, so they are well proven and tested.

    Together with the options of double or triple glazing, they also provide excellent insulation, ensuring your home remains cosy, warm and quiet.

    Our windows are sourced from FSC certified wood and carry the Danish ‘Indoor Climate Label’, which ensures the wood won’t release any toxic substances once installed.

    We understand that windows are a key feature in your house and can dramatically transform its look and feel, therefore all of our windows can be customised to your style.

    Rationel Windows
    • Thermal insulation (in W/m2K)


    • Sound reduction (in dB)


    • Security

      Secured by Design

    Technical Specifications

    Technical Specification
    Available in different styles yes
    Available in timber yes
    Available in aluminium clad yes
    U Values (triple glazing) 0.78
    Secured by Design yes
    I want to know more about this product