Cliveden Conservation were on site to scope out areas for some trial for cleaning of the stonework. Stone cleaning is being considered as an option to stabilise compromised stone which would save significant future replacement costs, and reduce health and safety risk

Changes to the climate (increased rainwater and temperature fluctuations) and airborne pollutions has caused a build up of sulphation crusts and salts on the surface of some stones. This surface grime is contributing to decay of the stone. Carved work is particularly vulnerable to decay because it has a large surface area in relation to its volume, often with exposed fine edges. Through research and specialist discussions a targeted and intelligent approach of stone cleaning emerged as a more cost and time efficient solution instead of adding new stone or replacing whole blocks.