W20 is the traditional heavy-duty framing system,32mmwide with 5mm thick flanges, originally developed for commercial and industrial applications, and which was introduced in the early 1960s to consolidate the various commercial steel window ranges available at that time (most notably the Small, Medium and Heavy Universal ranges). It accommodates single and insulating glass units up to 16mm thick in the same profiles simply with a change of bead. All glazing, whether in fixed lights or casements, is in the same plane. It can be divided into small panes with tee glazing bars, having a table face width of no more than 29mm. Opening windows are weather stripped using integral gaskets. Hinged casements, hung at top, bottom or side, and swing windows pivoted horizontally or vertically, can all be constructed from the same kit of profiles. Elemental coupling is achieved with simple slender transoms and mullions.

W20 replica replacement polyester powder coated and double glazed steel windows with true steel glazing bars.

Replica replacement


Polyester powder coating


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