2-847-454 - Historic England Archive/Heritage Images

A Laing stonemason working on the restoration of the east window at Carlisle Cathedral, positioning a new piece of stone in the tracery using SBD Certite putty to bond it to the existing fabric. In 1961, N M Phillips, the architect for Carlisle Cathedral started experimenting with the bonding material SBD Certite in the restoration of the cathedral. It was used on all but one of the decorated Gothic windows of the South Clerestory and later in the restoration of the north face of the cathedral. By using SBD Certite, Laing stonemasons were able to remove just the weathered surface of the stonework. New stone only two inches deep could be bonded to the old stone saving more of the original fabric of the building and cutting costs.