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Quick Product Snapshot
Key Information at a Glance
Opening Style
Outward top-guided opening
Frame Material
Timber or aluminium-clad timber, depending on chosen Rationel range
Best Suited For
Kitchens, bathrooms, utility rooms and rooms where the lower frame is easier to reach
Glazing Options
Double or triple glazing with acoustic, solar-control, safety, security and privacy options
Energy Performance
Rationel AURA and AURAPLUS windows offer strong thermal and acoustic performance, with triple-glazed options available
Security
Security hardware and laminated SECURE glass options available, with Secured by Design specification possible on suitable configurations
Warranty
Rationel timber/aluminium windows are typically covered by a 10-year warranty; timber windows by 5 years, subject to product range and terms
Design & Options
Rationel windows are made bespoke, so the design can be built around the property rather than limited to a standard size or finish. The main choices are whether to use all-timber or aluminium-clad timber, which opening function suits the room, and which glass specification is needed for comfort, privacy, security and acoustic control.
✓ Choose timber for a natural finish, or aluminium-clad timber for a lower-maintenance exterior.
✓ More than 200 colour choices are available, with different internal and external colours possible on suitable ranges.
✓ Glazing options include SOUND, SOLAR, OBSCURE, safety, security, patterned and coloured glass.
✓ Double or triple glazing can be selected depending on thermal, acoustic and project requirements.
✓ Opening functions can be matched across the home, including side-hung, top-guided, side-guided, tilt-turn, fixed and shaped units.
Why choose RATIONEL Top Guided Windows
Rationel top guided windows are a smart choice for rooms where everyday practicality matters. The lower-positioned handle makes them easy to operate above a sink, worktop or unit, while the outward opening keeps internal space clear. They bring the warm feel of timber together with the option of low-maintenance external aluminium cladding.
Key Features
Practical top-guided opening
for controlled ventilation
Timber or alu-clad timber
for lasting quality
Double or triple glazing
for improved comfort
Ideal above worktops
above sinks and worktops
Performance & Comfort
Rationel windows are designed to provide a strong balance of insulation, security and acoustic comfort. Triple glazing, SECURE glass, solar-control glass and acoustic options can be selected to suit the position of the window and the needs of the room.
Energy Efficient
Triple-glazed ranges achieve U-values from 0.78 W/m²K.
Enhanced Security
Security hardware meets Secured by Design requirements.
Weather Resistance
Low-maintenance alu-clad option with 40-year life expectancy.
Acoustic Comfort
Triple glazing gives up to 42–43 dB Rw sound reduction.
Are RATIONEL top guided windows right for your property?
Rationel top guided windows are a practical choice for rooms where the opening needs to sit above worktops, furniture or fitted units. They suit kitchens, utility spaces and bathrooms where ventilation is needed but internal space is limited. The style is especially useful when you want the warmth of timber and the performance of a modern Scandinavian window in areas that need to work hard every day.
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