Stone is one of the oldest and most versatile building materials. Its use ranges from providing essential support and protection to sophisticated embellishments. There is an enormous range of different stones, methods of working and uses, all of which contribute to our architectural heritage. Approaches to caring for stonework have changed over time and continue to evolve as we learn more about the material and the way it interacts with its environment.
The essence of good in-situ restoration is that the repair should have the appearance of natural stone and be less dense than the substrate. It should be neatly squared off and have the same texture as the adjacent stonework. It is always advisable to clean the stonework prior to restoration, and a repair that has been carried out professionally should last for many years
Prior to the commencement of works it is important to establish the cause of the deterioration. These could be inherent in the structure, structural problems caused by movement, or environmentally related. Once the cause has been established, and an assessment and diagnosis undertaken the correct conservation needs can be determined and agreed upon.