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.

Off-list price purchasing

We’ve simplified window supply. Our prices are published and available off-list, so you know exactly what you’re going to pay for them in advance. See the list here

The Ultimate Aluminium Window by Sliders UK

  • 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

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

View the technical specification

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

The Ultimate Collection

Setting the standard in door specification

With a wide choice of doors including PAS24 and Part Q compliant options, we have combined high performance security with a range of low threshold options, to create a highly flexible door range. It means that we’re able to give our trade, new build and specification customers access to a unique portfolio of products, which deliver new flexibility and opportunities but also built-in peace of mind to the end-user.

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10-Year Warranty

We are committed to product quality and take every step to make sure that our doors and windows are manufactured to the highest standards

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Customer support

To find out more please call 01772 698222 or email