About: http://webisa.webdatacommons.org/252975552

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	It looks like the joint was surrounded by some sort of cement or concrete reinforcing collar which has cracked badly allowing the joint to open a fraction.
http://www.w3.org/ns/prov#wasQuotedFrom	diydoctor.org.uk