Rationel Windows

Rationel Windows

Rationel Windows

Rationel Windows: Scandinavian Craftsmanship, Modern Performance

Exceptional windows are more than just a design choice; they are an investment in comfort, efficiency and timeless style. Rationel Windows combines Scandinavian aesthetics with cutting-edge performance, offering sleek, contemporary profiles crafted from sustainably sourced FSC® certified timber. Externally clad in aluminium, they are designed to withstand the elements while maintaining their natural beauty for decades.

Superior Insulation and Energy Efficiency

Built with 52mm triple-glazed units, Rationel Windows provide outstanding thermal insulation as low as 0.79 W/(m²K). This level of performance ensures a home that stays warm in winter and cool in summer, minimising heat loss and lowering energy consumption. Optimised for low-energy and Passivhaus projects, these windows contribute to a more sustainable future while enhancing indoor comfort.

Rationel Windows
Rationel Windows

Durability That Stands the Test of Time

With a construction depth of 123mm and a minimum life expectancy of 40 years, these high-performing windows are built to last. Rationel Windows are Secured by Design accredited, a police-backed initiative that ensures windows meet rigorous security standards. Independently tested for strength and durability, they offer enhanced protection and greater peace of mind. Designed to reduce external noise by up to 42dB, they create a tranquil, insulated living space without compromising on style.

Light, Space and Bespoke Design

The outward opening system of Rationel Windows allows for flexible design solutions while maximising ventilation. These windows are tailored to suit any project, whether a contemporary architectural statement or a refined renovation. Designed to let in as much natural light as possible, they offer a seamless blend of form and function, backed by a 10-year warranty for complete confidence in their longevity.

Rationel Windows redefines what a window can achieve for those seeking performance, beauty and sustainability.

Rationel Windows

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