Sustainable windows and doors from Rationel

FSC® certified timber

Rationel is certified according to the FSC’s global labelling scheme for sustainable wood and paper. We use FSC® (specifically FSC-C101947) certified wood from sustainable forestry, and impregnate it according to the environmentally friendly System ØKO2.

All our material suppliers sign a declaration, establishing a number of standards to ensure that due diligence has been given to both the environment and the mode of labour used. [Read more]




Rationel’s products are certified in accordance with the CE marking scheme developed in 2008. This is our way of guaranteeing that you will receive nothing less than a highly reliable product from Rationel windows and doors.




Offcut reuse

We carry out waste sorting with 100% accuracy for all waste produced at our factories.

Any spare wood and broken glass is returned to the manufacturer for reprocessing, and all offcuts and other forms of timber and wood waste from production are automatically fed back to our heating plant to heat the factories.  

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Danish Window Verification

Our production facility in Poland carries the Danish Window Verification (DVV) - a voluntary control system established by the Association of Danish Window Manufacturers to maintain high quality and excellence throughout the design and production process.

In accordance with DVV, the Association of Danish Window Manufacturers conducts regular factory visits to ensure that certified members comply with their established standards of quality.


Indoor Climate Label

Rationel windows and doors also conform to the Danish Indoor Climate Label. The Danish Indoor Climate Label standard represents a guarantee that Rationel products are conducive to good indoor air quality, and do not release toxic substances after installation.


Powder coating

The Rationel Powder coating plant is one of the most environmentally-friendly of its kind in Europe, holding Qualicoat and GSB approvals along with qualifying for compliance status with several other exceptional quality standards.

Considerable new investment has been made in order to create this state-of-the-art unit for our manufacturing facility in Poland, expanding the variety of finishing colours we can offer to our customers, available in either a matt or gloss finish.

Our eco-friendly powder coating plant is free of phosphates and hazardous heavy metals, minimising the production of sludge and simplifying sewage and wastewater treatment processes to ensure greater ease of maintenance. 



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