Clean lines, subtle detail and a variety options. Rationel is a versatile solution that covers everything from modern passive projects to traditional homes.

Danish Design

As one of Europe leading window and door manufacturers, Rationel offer an impressive range of premium quality products that are simple and elegant in design with sublime functionality.

What's Your Style?

Wether you need a contemporary or traditional look, Rationel can deliver the same product in two distinct styles, Aura and Forma. The “Plus” refers to the addition of external aluminium cladding onto of the timber frame.

Contemporary styling

* See Rationel warranty for details

Traditional appearance

Experience the best of both worlds. Rationel FormaPlus offers all the benefits of natural wood on the inside and easy maintenance on the outside, still retaining an authentic traditional appearance.

Triple Glazed

0.80 W/m2K

Double Glazed

1.28 W/m2K

Timber frame inside and out, Rationel Aura windows create a beautiful natural look with a clean contemporary design.

Triple Glazed

0.78 W/m2K

Double Glazed

1.29 W/m2K

The design of AuraPlus is slim and elegant. A stylish architectural appearance whether you are building a new house or refurbishing an existing one.

Triple Glazed

0.79 W/m2K

Double Glazed

1.29 W/m2K

Rationel Forma windows are made entirely from timber and features Georgian bars and ovolo moulded profile. An ideal choice for country-style and traditional designs.

Triple Glazed

0.78 W/m2K

Double Glazed

1.27 W/m2K

Working
In Harmony

Rationel windows are crafted from high grade FSC certified timber combined with a slim external aluminium cladding. This gives all the cosmetic and thermal benefits of natural wood inside and longevity and easy maintenance outside.

Rationel provide solid workmanship, high thermal values, SBD ironmongery, and are suitable for passive house builds.

Now Open

Rationel windows and doors are capable of a variety of opening styles all with the same uniform look.

Add colour

Enhance the appearance and character of your house through your choice of colour. Rationel can offer any colour from the RAL classic range.

FormaPlus and AuraPlus can also be finished in Granite coatings, a tactile finish with a subtle metallic effect.

Discover how our customers have introduced Rationel Windows and Doors in their homes. Look through Scene Showcase to get inspiration for your project.