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Table 3 Summary of expected outcomes for surface recession/loss from the LegIT caused by salt crystallization pressure

From: The design of a legacy indicator tool for measuring climate change related impacts on built heritage

Near future (to 2020)
 Salts present in fresh stone together with pore size and distribution will determine the initial occurrence of salt weathering. Most susceptible are likely to be Portland and brick
Medium term (to 2050)
 Surface porosity of stones is likely to alter due to weathering; salt loading from the atmosphere will also change the availability of soluble salt. Salt action is likely to increase in this period
Far future (to 2101)
 The REMO modeling by climate for culture (C4C) provided to the author for the case study sites [5] suggests a slight reduction in NaCl crystallization while projections by Noah’s Ark and research into deep wetting at Queens suggest salt damage will increase. The outcome remains uncertain