Rationel Doors


With more than 60 years of product innovation and development, Rationel is one of Europe’s leading window and door brands with a reputation for quality and innovation, and with a solid distributor network. Founded in Denmark in 1954, Rationel is now part of the DOVISTA Group of leading window and door companies, and every year makes and delivers over 350,000 windows worldwide.

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Rationel windows and doors are ideal for:


Renovations and refurbishments – replace old or poorly performing glazing with stylish, well-made, long lasting windows and doors. Extensions – new windows for new projects to ensure excellent insulation, durability and in a style to match your existing home. Both traditional and modern homes – with two window styles available, classic and contemporary, every home can enjoy the benefits of Rationel windows and doors. Scandinavian inspired homes – windows and doors with an emphasis on light-filled rooms, solid craftsmanship and an elegant finish.



The ideal window for modern and contemporary homes. The sleek, flat frame offers clean lines and a flush finish, adding a touch of Scandi-style to every room. Add glazing bars for extra detail or keep things simple with beautiful, uninterrupted glass.



Designed to complement traditional British architecture, FORMA and FORMAPLUS windows feature timeless details, such as bevelled edges and angled glazing beads, which make these windows the ideal fit for classically styled homes or older properties. Optional glazing bars add the perfect finishing touch.



Make an entrance with a Rationel door. Find the ideal door for your home and your lifestyle from our wide range designs, colours, and finishes, including flush and glazed doors, and patio doors. For contemporary style choose AURA or alu-clad AURAPLUS doors, or opt for FORMA or alu-clad FORMAPLUS for a more traditional look. All our doors are made from strong, high quality materials and meet Secured by Design standards which means they are incredibly hard to force.


RATIONEL windows & doors – in detail

Impressive durability

With an expected lifetime of 60 years, all-timber AURA and FORMA windows offer impressive durability. For added peace of mind, and for more demanding locations, choose AURAPLUS or FORMAPLUS. Both feature an alu-clad external frame which adds 20+ years to your windows, and only needs minimal maintenance.

Cosy and quiet

Stay warm and cosy with Rationel. Choose from double or triple glazing to help achieve the ideal comfort level in every room. Excellent insulation also means great noise reduction, so add peace and quiet to the list of Rationel benefits.

Protect the environment

Reduce your carbon footprint, and your energy bills, with energy efficient windows. Beautiful slim frames (made from FSC®-certified wood) are designed to increase daylight and Rationel windows also carry the Danish ‘Indoor Climate Label’, proof that they won’t release toxic substances after they’re installed.

Safe as houses

All Rationel outward opening windows meet Secured by Design standards, which means they are designed to withstand a typical burglar’s attempt to break into your home. Features such as extra strong ironmongery, laminated glass and multi-point locking all help keep you safe and secure.

Windows tailored to your home

Rationel windows are manufactured to order so make every window your own. Choose from a range of different opening types, and from an impressive palette of colours and finishes – you can even select a different colour inside and out. And don’t forget the glass – if you need more privacy or security, greater solar control, better noise protection, or even brightly coloured panels, we have the options to choose from.

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