Aluminium Windows


Steel replacement aluminium windows

The flexible aluminium window Suite


Crown Steel Replacement windows are ideal for new-build and renovation projects where slim sightlines are required. 

Crown Steel Replacement windows exceed the current requirements of Part L 2016 of the Building Regulations for both thermal insulation and air permeability. The product has also been designed to be compliant with future anticipated changes by being able to achieve WER A rating. Crown Steel Replacement is also compliant with PAS 24. 

System features of the Crown Steel Replacement aluminium window:

  • External Bead Glazed as standard
  • Internal Glazed vent option
  • WER to "A" Rated
  • 24mm and 28mm glazing

Design features of the Crown Steel Replacement aluminium window:

  • Suited handle range
  • Casement and Fixed Light options
  • Dual-colour available 
  • Outer frame and vent sightline is less than 40mm

Our brochures are available to download on the documentation tab above.

Book on our Product Introduction Training online.

Crown Steel Replacement Windows Brochure (pdf)
Crown Residential Brochure (pdf)

Product benefits


  • 24mm or 28mm glazing as standard
  • Casement and Fixed Light available
  • Outer frame and vent sightline less than 60mm


  • Side hung and top hung variations available
  • Aluminium lockable window handle with 90­° stop position
  • Internal Glazed Vent Option
  • Dual Colour Option


  • Over 400 colours available with optional finishes
  • Handle Colours include Silver, Matt Black, Gold, Pure White, Polished Chrome, and Polished Gold


  • Water Tightness - 600Pa/ Class 9a
  • Air Permeability - 600Pa/ Class 3
  • Wind Resistance - 2000Pa/ Class B5

More information

Technical manual

Technical Manual Access

Our technical manuals are available for our customers to view after registration

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