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Keystone Supplies, Unit 17 Storforth Lane Trading Estate, Hasland, Chesterfield, Derbyshire, United Kingdom S41 0QQ
01246 201523‬‭
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Rationel Windows

Keystone Supplies Limited is based in the historic market town of Chesterfield, Derbyshire.
As an independent supplier of timber windows, doors, Keystone Supplies have the ability to design and supply entire projects, meeting the requirements of any particular development.

Group 77

Rationel Windows & Doors

Your Door is The Gateway to Your Home

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.

ABOUT US
Group 79

The ideal Window for Modern and Contemporary Homes.

Rationel Windows

Rationel windows and doors – 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

Rationel Windows Img4

The ideal Window for Modern and Contemporary Homes.

Rationel Windows

Rationel windows and doors – 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

FORMA and FORMAPLUS

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.

FORMA – key features and benefits
Solid wood frame
Life expectancy of 60 years
Double or triple glazed
Available in more than 200 colours
Meets Secured by Design standards


FORMAPLUS – key features and benefits
Solid timber frame externally clad in aluminium
Life expectancy of 83 years
Double or triple glazed
Available in more than 200 colours
Dual colour frames at no extra charge
Meets Secured by Design standards

AURA and AURAPLUS

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.

AURA– key features and benefits
Solid wood frame
Life expectancy of 60 years
Double or triple glazed
Available in more than 200 colours
Meets Secured by Design standards


AURAPLUS – key features and benefits
Solid timber frame externally clad in aluminium
Life expectancy of 83 years
Double or triple glazed
Available in more than 200 colours
Dual colour frames at no extra charge
Meets Secured by Design standards

   

RATIONEL windows – 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.

CONTACT US

Got a question you want answered?

If you have any questions or would like to know more please use the contact form below to get in touch with Keystone.

Company No: 08821594

Vat No: 189597232



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Keystone Supplies
Unit 17
Storforth Lane Trading Estate
Hasland
Chesterfield
Derbyshire
United Kingdom
S41 0QQ