W40 Windows are an evolutionary development from W20. W40 offers continuity of style with the same casement sightlines as W20, but the 40mm wide profiles permit the use of double or triple glazing up to 26.8mm thick.

Steel Window Services, acting as Main Contractor, replaced the existing aluminium windows with new W40 galvanised and powder coated acoustically insulated and double glazed new steel windows. The school is a grade II* listed building located in a sensitive area.