Rationel Windows & Doors

Rationel Windows & Doors

Since 1954, Rationel has been perfecting the art of manufacturing energy-saving windows and doors of the highest quality, with a strong focus on both security and comfort. Beautifully designed windows can encourage mindful living and shared experiences, and create a literal opening to the outside world.

Designed in Scandinavia, for British homes that desire the balance between daylight and comfort. Rationel windows use sustainably sourced timber and exceptional craftsmanship – they’re built to last for decades and to be enjoyed for generations. 

Rationel Windows and Doors Specifications

Security Meets ‘Secured By Design’ standards
Sustainability Majority sourced from FSC-certified forests
U-Value 0.79 W/m2k (triple glazing)
Sound reduction 42 DB Rw (triple glazing)
Colours Over 400 RAL colours available
Compliance Meets Passivhaus standards