Repair can be defined as “work beyond the scope of maintenance, to remedy defects caused by decay, damage or use, including minor adaptation to achieve a sustainable outcome, but not involving alteration or restoration” (Conservation Principles 2008). Repair is normally carried out to sustain the significance of the building or place. Equally important in most cases is keeping the building in use, which is the best way to safeguard its future.In order to sustain significance you first need to understand the values that contribute to that significance and then how the elements that will be affected by repair contribute to those values.