Using the Rinzaffo MGN Roman waterproofing lime plaster, one can create waterproof but breathable plinths near the base of any building to prevent rainwater splashback, keeping the building fabric dry.
Here is the link to the Rinzaffo MGN waterproofing lime plaster: https://www.coreconservation.co.uk/rinzaffo-salt-resistant-scratch-coat/