The Corporate W20 window and door range offers great versatility. No other steel window system offers such an extensive range of profiles, allowing the designer the opportunity to create many styles including elaborate composite windows.

An effective weatherstripping system and the option of double glazing up to 16.4mm / 5/8″, ensures excellent thermal insulation properties – and the system’s large opening casements and slim frame make it particularly popular with conservationists and planners.

Crittall Commercial Specification offer a design and consultancy service for architects.

For enquires – please fill out enquiry form or call us on 01376 530800.  

Features and Benefits

  • Offers flexibility in design via shaped windows and has the ability to form extensive composite windows
  • Glazing up to 16.4mm / 5/8″
  • Aesthetically delivers very slim sightlines thus maximising the glazing
  • Hot-dip galvanized
  • Factory-applied Duralife polyester powder coat finish
  • Integral EPDM weatherstripping
  • English Heritage Approved
  • Ideal for Replica Refurbishment

Hardware Range

  1. Standard hand operated folding opener.
  2. Standard spring catch.
  3. Peg stay.
  4. Standard friction restricting stay.
  5. Concealed bolt.
  6. Standard side arm.

Alternative hardware can be accommodated contact Crittall for detail.

Hardware:  Crittall Windows Hardware Brochure

Window & Door Types

Windows Types And Limit Chart Corpo W20


1 Limits for single pane only

2 Subject to glass weight limits

3 Minimum height of kicking panel 12″

All maximum sizes are given for guidance only. They assume the use of standard hardware specified for each type. Maximum sizes may not be achievable when heavy glass is used

Consult Crittall Technical Services Department for advice:  Contact

Accoustic Properties

Sound insulation of weather stripped windows/doors (approximate values averaged over a frequency range of 100 to 3150Hz).

Accoustic Proproperties Corpo W20


Steel Performance Corpo W20

*A higher wind resistance can be achieved.

Main performance is based on UK test criteria for US value equivalents (ASTM) contact us.

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