Founded in 1824 this national institution houses over 2300 paintings dating back to the 13th Century. The main façade, The Wilkins Building, so called after it’s architect William Wilkins was constructed in the 1830’s. The post-modernist Sainsbury’s Wing was added in 1991 to provide more exhibition space.

Since 2019 Stone Edge Conservation have been involved in numerous projects at the gallery, the most significant of which was the external refurbishment of the Sainsbury’s Wing and the two “pepperpots” standing either side of the main façade of The Wilkins Building.

Restrictions on licenses and timings made the cleaning of the façades particularly challenging, working closely with the Gallery’s design team and heritage consultants the most effective and least obtrusive methods of cleaning were determined by extensive sampling. In conjunction with the cleaning minor masonry repairs were undertaken as well as replacement of the degraded sealants and an overhaul of the pigeon deterrent system.

Other works carried out by Stone Edge Conservation include the refurbishment of the Central Hall Lantern Light with the installation of a bespoke walkway, cleaning and repairs to the main portico mosaic floor and the reinstatement of a 5m high marble doorway, previously covered over and hidden within the walls of the gallery.