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Article Date: 1st December 2017

Selectaglaze - The Perfect Acoustic & Thermal Solution for a Listed Watermill

Listed Watermill - Sacrewell Watermill - Secondary Glazing - Horizontal Sliders

Selectaglaze - Sacrewell Watermill near Wansford, Peterborough

The Grade II* Listed Sacrewell Watermill near Wansford, Peterborough dates back to c.1730, although there are suggestions that the Romans were utilising water at Sacrewell hundreds of years earlier. The present watermill remained in full working order until 1965.

Sacrewell Mill reopened in July 2015 after a £1.8 million restoration and conservation project that was backed by the Heritage Lottery Fund and the William Scott Abbott Trust. Cambridge architecture firm Purcell oversaw the restoration of the watermill, also adding a learning centre to the site, to make it a local attraction. The William Scott Abbott Trust £1 million contract was awarded to Tinwell-based conservation and restoration builders Messenger Construction, after a tender process against other specialist building firms from around the UK. Messenger worked to restore as many original features of the mill as possible including the installation of a £40,000 waterwheel incorporating a hydro-electric turbine.

Selectaglaze - Sacrewell Watermill near Wansford, PeterboroughCommenting on the restoration, project officer Jane Harrison of the William Scott Abbott Trust said, "The project is a great opportunity to work together to ensure this nationally significant building remains operational for future generations."

The existing windows suffered from significant heat loss due to their age. Messenger chose Selectaglaze, the leading expert for secondary glazing, to deliver a bespoke solution which retained the existing primary windows, yet upgraded their thermal and acoustic performance. Selectaglaze worked closely with Purcell to design solutions that would work with the existing architecture of Sacrewell.

Selectaglaze installed a total of 8 units in the watermill, bringing the spaces up to modern standards. The windows were treated with a combination of Series 10 2-pane horizontal sliders and Series 10 3-pane horizontal centre sliders, set to match the original window’s sightlines. The Series 10 horizontal sliding secondary windows are a versatile and slimline system that allows easy access to the outer window.

The original plaster reveals were full of character; some were splayed and most were neither plumb nor true. Purpose made joinery grounds were produced and carefully installed to ensure the closest of fits was achieved with the secondary glazing.

Selectaglaze - Sacrewell Watermill near Wansford, PeterboroughToughened safety glass with a low emissivity coating was used, achieving a U-value of 1.8, thus reducing heat loss by around 60%. In addition, the installation of secondary glazing provided a significant reduction in noise egress and ingress as the windows were individually measured and manufactured to ensure the closest fit possible.

The restoration of this historically important building has been a great success, with Sacrewell Watermill winning RICS East of England Project of the Year in 2016. The mill, which before the restoration was on Historic England’s ‘At Risk’ register, also won awards in Building Conservation and Tourism and Leisure.

Royal Warrant Holder, Selectaglaze has been established for fifty years and in that time gained extensive experience working on all building types.

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