AluK 58BW Windows

Capital Windows 58BW window system is a thoroughly versatile suite of aluminium window sections offering excellent design, first class aesthetics and is one of the slimmest aluminium windows available.

Whether the building is traditional or modern, residential or commercial the wide range of profiles available make it ideal.

Capital Windows can provide this window in a wide variety of options and styles these include:

  • Top hung or side hung casement windows
  • Bottom hung opening inwards windows
  • Tilt and Turn Windows
  • Pivot Windows

alukThis replacement option offers an ideal solution for the replacement of old steel windows. This ultra slim window can match the design of original steel windows where these windows are integral to the overall look of the property, whilst offering high security and excellent window energy ratings.

Each of our aluminium windows is further enhanced by a range of complementary outer frame, sash, mullion and transom profiles enabling an exact design to be created and a particular look to be achieved.


We believe our aluminium window offers you the very best in sight lines, weather performance, aesthetics and at competitive prices.

Technical Specifications


Any RAL colour can be supplied including dual colours.

9011 Graphite Black
7016 Anthracite
RAL 9910 Hipca White Gloss

General Description

A versatile and fully integrate suite of aluminium window sections, utilising the very latest in polyamide thermal break technology. Offered with a large range of profiles to create tailor made aluminium windows for traditional and modern buildings, residential or commercial.


  • Top hung or side hung casement windows
  • Bottom hung opening inwards windows
  • Tilt and Turn Windows
  • Pivot Windows


  • ‘Planitherm Total +’ low emissivity 24mm or 28mm sealed units
  • Clear glass, soft coat lamination, argon filled units
  • Can accommodate glazing up to 44mm or triple glazing
  • Standard U value of 1.4wm2K


  • High security achieved by multi point locking systems, kite marked to PAS 24/Secured by Design


  • Windows are tested to the requirements of BS6375
Class 4 Air Tightness
  • Class 9a Water Tightness
  • Class E2400 Wind Loading

Additional Product Features

  • Outer frames can be provided in either 70mm or 58mm depths for replacement, direct fix or new building applications.
  • Profiles can be specified in chamfered, ovolo or contemporary flat apearance.
  • Trickle ventilator options available using specific frame head profiles for a clean look.
  • Windows are available as internally or externally beaded, without any compromise on security.
  • Will meet the requirements of ‘Secured by Design’.
  • A unique double bead options removes the need for costly dummy sashes.

To discuss our range of AluK 58BW Windows options call:

01895 271 061