Rationel Windows

When you are buying new windows Rationel have a wide range – but the choice is yours. Our windows are made from the absolute best Nordic heartwood and they are available both in timber and in timber/aluminium. To make it easy for you, we have divided our windows into two groups: windows for the modern building style and windows for the traditional building style. And remember, we produce your windows according to individual needs, objectives, colours, glazing bars etc.

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Our guarantee for quality

Uncompromising quality characterises all Rationel windows and doors. It is our guarantee to you that the durability of Rationel windows and doors are among the best on the Danish marke.


Minimum maintenance

On our Aluclad (timber / aluminium) window the outside of the window is protected with an alumiunm cladding. If you choose a timber/aluminium window then you can look forward to minimum maintenance.


Save the energy

You are guaranteed to keep in the heat and save on energy with energy-efficient windows from Rationel. You will get the optimal solution with our PREMIUM version, which sets the standard for energy optimization.



Here at Rational we want to make sure that you sleep peacefully at night knowing that your home is safe from intruders. Rationel windows and doors are tested and marked according to several national and European standards, including ’Secured by Design’.


Explore our quality windows and doors in one of our showrooms. Find the one nearest to you.


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