The Ultimate Aluminium Window

Manufactured in ALUK’s proven 70mm Optio system, the new Ultimate Aluminium Window from Sliders UK is defined by its exceptionally clean sightlines, making it suitable for traditional and contemporary applications.

It accommodates double and triple-glazed insulated units of 24mm to 40mm, employing a unique polyamide thermal break design to achieve u-values as low as 1.2W/m2K.  The Ultimate Aluminium Window is also fully tested to PAS24 and is part Q compliant, making it the perfect choice for a wide range of residential installations.

Download The Ultimate Aluminium Window brochure

Features and benefits

  • Slim sightline 70mm system
  • Accommodates glazing units of 24 to 40mm
  • Unique polyamide thermal break design
  • U-values as low as 1.2 W/m2K
  • Integrated deep head profiles for ease of trickle ventilation
  • PAS24 and Part Q approved
  • Multi-point locking
  • Chamfered, Contemporary and Ovolo beading options
  • Weather tested to: Air tightness Class 4 (600PA); Water tightness 9a (600Pa); Windload Class E2400 (2400Pa)
  • Available in multiple configurations including top, side and French casement
  • White and grey as standard anodized finishes plus dual-colour options
  • Green Guide A rating

Colour and Finish options

Available in white or anthracite grey as standard, plus dual colour options and any RAL colour as special order, the Ultimate Aluminium Window comes in a range of fully anodised finishes, also carrying a 10-year guarantee.

Cross Sections for the purposes of colour illustration only. Actual design may vary

View the technical specification

Highly engineered and Ultra-energy efficient aluminium windows from Sliders UK.


Delivered with your lantern roof, bi-fold or inline sliding patio door order

With nationwide delivery, industry leading product protection, dispatch and on-time in full, we’ll deliver your Ultimate Aluminium Window complete with bi-fold or inline sliding patio doors to site or your own distribution centre as part of a single order.

We guarantee that you’ll get what you want, when you want it.

Call 01772 698222  or email

The Sliders UK difference

10-year security guarantee

We are committed to product quality, ensuring our doors and windows are manufactured to the highest standards

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Manufacturing excellence

Everything we ship goes through a rigorous quality control and dispatch process.

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The Ultimate Collection

PAS24 and Part Q compliant, high performance security with a range of low thresholds.

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Customer support

To find out more how we can support you and your customers, please call us on: 01772 698222, or email

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Aluminium windows are seeing significant commercial growth but are also making inroads into the home improvement sector.

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