Timber Windows

Timber Windows

Rationel Windows are a Danish manufacturer of high-tech timber windows. These made-to-measure products are crafted from independently certified sustainably sourced materials for a natural finish that looks simply stunning.

Weather Resistant Design

Rationel Windows are weather resistant and water-tight – which makes them perfect for our Great British weather! Able to withstand extreme wind speeds of 27m per second (similar to that of a hurricane!) and 600 litres of water without leakage or damage, these extensively tested timber windows are built to last a lifetime even after being opened and closed over 20,000 times!

Safe & Secure

Alongside their durability, Rationel timber windows are designed with security in mind. Each model is tested in accordance with several national and European safety standards. Rationel windows are carefully crafted with a laminated pane and security receiver with countersunk screws fixed into the sturdy part of the frame. The hinges are also reinforced with extra-strong security angles, which prevents the sash from being pulled out of the frame – a great deterrent for even the most tenacious of thieves!

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Aura Timber Windows by Rationel


Sleek and minimalist, AURA timber windows from Rationel are energy efficient and beautiful. Constructed from solid timber with a stunning natural wood finish, these triple-glazed timber windows are designed for superb optical clarity and high performance. With 52mm triple-glazing or 32mm double-glazing, AURA windoes can achieve U values as low as 0.79 and dramatically reduce your CO2 emissions and energy bills.

Exterior of building

Rationel Forma Timber Windows In Stone

Forma Timber Windows from Rationel


Ideal for heritage renovations and listed buildings, FORMA windows from Rationel bring energy efficiency with a traditional finish.  Produced with a solid timber construction, they are easy to join in multiples, which makes them the perfect choice for complex window designs.

Contact Us For Timber Windows

Rationel timber windows from Salop Glass & Glazing are a beautiful, secure and easy maintenance addition to domestic and commercial properties. Contact us for a quote today.

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Fit of Rationel Timber Windows in Tunbridge Wells


Rationel FORMA

  • Adjustable hinges
  • Angled glazing bead
  • Chamfered internal profile
  • Trickle vent option
  • Slim 25 glazing bar option
  • Varied range of opening functions included sidehung, topswing and fized light
  • Available in an array of sophisticated colours

Rationel AURA

  • Square glazing bead
  • Squared off internal profile
  • Fully adjustable ironmongery
  • Security ironmongery
  • Trickle vent option
  • 31mm glazing bar option
  • Available in a variety of opening designs to suit your lifestyle
  • Variety of contemporary colour options

Rationel AuraPlus Timber Windows