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Brands
Rationel®
Rationel®
Known for its Scandinavian design and outstanding performance, Rationel is a leading Danish manufacturer offering composite timber and aluminium-clad windows and doors designed to withstand harsh climates. Their glazing solutions are engineered to deliver outstanding thermal efficiency, long-term durability, and refined design detail.
Rationel products offer a harmonious balance of natural materials, slim profiles, and long-lasting durability – making them ideal for both modern and traditional architectural styles. Slim timber frames, traditional casement profiles, glazing bar options, and authentic joinery detailing allow their windows and doors to integrate seamlessly into period properties, listed buildings, and conservation areas without compromising comfort or performance.
All products are factory-glazed and performance tested to stringent European standards. Their contemporary ranges, such as AURA and AURAPLUS sit alongside heritage-inspired collections, including FORMA and FORMAPLUS, offering design flexibility across both modern homes and traditional renovations.
The company is committed to sustainability and indoor air quality, sourcing 99.7% of its wood from sustainable northern European forests, ensuring it is FSC® certified. Additionally, all Rationel windows and doors carry the Indoor Climate Label, confirming that the products do not release toxic substances and actively contribute to a high-quality indoor climate.
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