The W20 Range

Hot rolled mild steel W20 sections have been used to manufacture windows and doors for over 50 years, having a proven track record of providing Strength, Security and Durability whilst also providing desirable slim lined frames.

The sections have a wider front to back profile of 32mm compared to the earlier introduced SMW sections (25mm) and have thicker walls which give greater strength to the frame. The W20 range also has the largest number of material sections available including equal and extended leg sections making it suitable for any fenestration application to any material boundary. These properties result in W20 steel sections having versatile design capabilities that can be configured to a whole range of styles of Window, Door and Curtain walling specifications (see typical configurations below).

Glazing is available in either leaded lights (lattice windows) or in single or in double glazed units. W20 sections can comply with Building Regulations Part L (2006) if appropriate glazing is used.

Windows example configurations
  • Fixed Light.
  • Side Hung Open Out.
  • Side Hung Open In Casement.
  • Top Hung
  • Bottom Hung
  • Vertical Pivot
  • Horizontal Pivot
  • Multi-light combinations
Door example Configurations
  • Single –leaf door left-hand open out.
  • Single –leaf door right-hand open out.
  • Double-leaf door open in left-hand first opening leaf
New Glazing

Our W20 Windows are available in leaded lights, single glazing or double glazed units.

Conservation and restoration of historical original glass is possible for renewal and replacement schemes or, where necessary, new glass which is sympathetic to the original glazing may be used.

Leaded Lights and Lattice windows

We offer a full design and manufacture service for leaded lattice windows alongside our typical designs of Diamonds, Square, Queen Anne and bordering styles.

Single glazing

We offer a full range of modern and historical single glazing and that includes among others Toughened and Annealed Clear Float, Laminated, Horticultural and hand blown and moulded sheet replica cylinder and crown glasses.

Double Glazing

W20 Windows can take double glazed sealed units of up to a maximum thickness of 22mm. Typical specifications of Building Regulations Part L can be met by using a configuration of 4mm clear float – 14 mm argon filled cavity – 4mm low e glass, and thinner 16mm units are possible using Kypton or Xenon gas. Double glazing also has the advantage of being able to include other glazing technologies such as solar control, fire resistant and self cleaning glass.


The Steel Window Company is a Trading style of Fabco Sanctuary Limited.
Registered In England & Wales No. 6552850. Vat No. 931 9093 17
© Fabco 2008 -- Unit 1, Hobbs New Barn, Climping, Littlehampton, West Sussex, BN17 5RE
--Tel: 01903 718 808 -- Fax: 01903 718 903 -- info@thesteelwindowcompany.com--