We've been told that we have rising damp along one of our internal party walls (Victorian terraced house - c.100 years old) - see attached photos taken during recent redecorating. A few damp specialists have been over and they've all recommended injecting the wall with a DPC paste and getting the affected walls replastered. From what I understand, the DPC paste will block further moisture from rising and the replastering will get rid of contaminated plasterboard which can attract further moisture. This seems to only stop further moisture from rising, rather than treating the actual source of the issue though - is this typical treatment for rising damp? Are there other options which would more effectively target the actual source of the problem?