About: http://webisa.webdatacommons.org/234315009

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Concrete as a stand alone material can withstand high moisture levels and will not degrade and so if the dampness is a problem then you can cover with bitumen to seal it in, or asphalt it.
http://www.w3.org/ns/prov#wasQuotedFrom	diydoctor.org.uk