ALUK Optio 58BW ST Casements

Slimline Aluminium Windows

  • Contemporary Flat Sash
  • Internally Or Externally Beaded
  • Ideal for Listed Buildings
  • Polyamide Thermal Break Technology
  • Energy Rated 'B'

ALUK Optio 58BW ST Casements

Minimal, durable, secure.

With minimal sightlines and maximum weather resistance ALUK Optio 58 ST Casements are the perfect choice for contemporary new build and refurbishment projects.

A choice of frame depths and heights make for multiple windows configurations.

A versatile slimline aluminium system

The ‘Choices’ standard aluminium window is the Optio ‘58BW ST Casement’.

The aesthetics of steel with the benefits of aluminium ‘Choices’ 58BW ST aluminium windows are an ideal replacement for existing steel windows. Contemporary flat sashes with high thermal and acoustic performance.

Aluk 58 St Window


  • Contemporary Flat sash
  • 58mm or 70mm front to back profile depth
  • Frame Heights – 43mm, 53mm and 73mm
  • Externally glazed fixed panes or internally glazed dummy sashes
  • Window Energy Rated ‘B’
  • Black or White cranked handles
  • Polyamide thermal break design for thermal performance

Contemporary flat sashes

Aluk 58BW ST 70mm Casement Diagram
Aluk 58BW ST 70mm Casement Diagram

Available in two frame depths

43 Mm Frame Depth
53 Mm Frame Depth

Available in two frame heights

43 Mm Frame Height
53 Mm Frame Height

Colour Range

For fast delivery



RAL 9910hg

Anthracite Grey

Anthracite Grey

RAL 7016m

Anthracite Grey White

Anthracite Grey / White

*Open out only

Available in any RAL colour

Available in a range of Single and Dual RAL Colour finishes


White Cranked Handle



Contact us on 01536 271940 or complete our Online Enquiries Form