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After a comprehensive site visit, our Technical Advisors set about meeting the challenges faced by the Victorian period windows, which were sophisticatedly trailed with pinned timber shutters. proved a slight task for the attainment of the desired acoustic outcome. Using years of experience, we made our secondary glazing recommendations. As you would expect from such a prestigious period property, it was necessary to gain Listed Building Consent. So detailed and scaled section drawings of the existing and proposed windows were prepared and submitted to the conservation department at the council for their approval.

Modern secondary glazing for traditional Victorian windows

For the treatment of these large traditional sash windows, our higher capacity spring balanced vertical sliders (Series 25) glazed with 6mm toughened glass served as a more robust acoustic solution. The Series 25 vertical sliding systems accepts thicker heavier glass, and in this case, 6mm toughened glazing provided the enhanced noise insulation required, whilst also improving the thermal insulation and eliminating any drafts. In addition to this, the Selectaglaze vertical sliding products’ sashes contra slide to allow access for cleaning and opening of the primary window. The pinned timber shutters were not to be modified in any way and so this left little room for a large cavity space to help ‘decouple’ the window and reduce transmission noise. Around 100mm cavity space between the primary and secondary window together with the 6mm toughened glass, produced the desired results. Our secondary glazing systems were sympathetically applied to the traditional Victorian wooden sash windows with complementing specially machined painted splay timbers to complete a truly precision installation. This allowed for an almost invisible secondary glazing system that was unobtrusive in an elegant finish – fitting to the exterior architecture’s style and feel.