What are SMW Windows?

What are SMW Windows?

Cotswold Casement Company Standard Metal Window (SMW) ‘F’ Series window range has been manufactured since the 1920s, and is a stylish solution for a number of aesthetically sensitive historical projects. 

Available only single glazed, SMW windows are primarily used today for bespoke replacement work in Conservation Areas and Listed Buildings, where a suitable geometric match is required and double glazing is not an option. 



Windows from Cotswold Casement's SMW range use a single pane of glass, which can be up to 10mm thick. Silicone fronted for an authentic appearance and low maintenance, they use single point locking, an external hinge and simple weather stripping detail. Each frame is made from recycled steel to add a further eco-friendly credential.

Key Features

  • Single glazed up to 10mm
  • Traditional single point locking with an external hinge and simple weather stripping detail
  • Silicone fronted for authentic appearance and low maintenance
  • Various glazing options
  • Supplied shaped, with shaped heads, or 'curved on plan'



Manufacturing Information 

Cotswold Casement's SMW Window are made to suit your individual requirements. SMW windows are generally manufactured in accordance with BS 6510:2010 specifications for hot rolled steel windows. All frames and ancillary profiles are hot dip galvanised to BS EN ISO 1461 and available with a factory applied polyester powder coating to BS EN ISO 13438 from the RAL colour range, exceeding the minimum paint thickness over the zinc of 60 microns.

Our frames are manufactured from hot rolled mild steel profiles with corner joints mitred, welded and dressed square and flat. Small panes can be formed with T glazing bars whose ends are tenon riveted and/or welded to the frame and cross joints are interlocked and welded with rigid joints.

Composite windows can be assembled by connecting windows horizontally and/or vertically with mullions and/or transoms of hot rolled slim steel profiles. Box sections are available as tubes or as box mullions which can be either hot rolled or manufactured from sheet steel. Pressed metal cills are available in a choice of profiles. Trickle vents can be fitted in accordance with Part F of the Building Regulations.



For more information visit our single glazed section of the website. 

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