AluK Windows

Capital Windows have over 40 years experience manufacturing and installing an exceptional range of windows, doors and associated products. Whatever the project, we have the right approach and materials for the perfect finish.

One Of The Slimmest Aluminium Windows Available

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

Weather Performance, Aesthetics & Competitive Prices

This 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.

Wide range of windows

Technical Specifications

Any RAL colour can be supplied including dual colours.

9011 Graphite Black7016 AnthraciteRAL 9910 Hipca White Gloss9016SG

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 appearance
  • 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

Established in 1979, Capital Windows Ltd provide the biggest choice of home improvement products from the leading names and systems companies.