A unique picture gallery designed by John Nash, the renowned Regency architect who re-modelled Buckingham Palace, has been saved by the installation of a new Pilkington Planar roof at stately home Attingham Park near Shrewsbury.
Work has been completed on the new roof, which will ensure the 200-year-old glass and cast-iron structure installed by Nash is protected from the elements.
Architects S T Walker & Duckham, appointed by the National Trust to design the new roof, selected the Pilkington Planar system because of its low-profile appearance, high structural strength and high clarity.
The installation, which consists of 133 sq m of double-glazed frameless units supported by steel bowstring trusses, was carried out by specialist conservation contractor Norman & Underwood.
The glazing also filters out UV light, which can be harmful to paintings and fabrics, and the roof design features blinds that will close automatically in order to achieve conservation black-out when the gallery is closed to visitors.
Andy Chamberlain, Restoration/conservation manager at Norman and Underwood said: This was a complex installation from an engineering standpoint. There are 44 individual double-glazed units, weighing 12 tonnes in total, and ranging in size from 0.75m to 2m and none of them are square.
A great deal of precision was required in positioning the mounting points, so the manufacturing quality of the Pilkington Planar system was critical in getting the installation right as there was no margin for error.
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