About: http://webisa.webdatacommons.org/183409593

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	Double glazed window frames are available in a variety of styles and materials such as wood and uPVC, which also have different insulating properties; uPVC frames are more insulating than metal, for example.
http://www.w3.org/ns/prov#wasQuotedFrom	servicemagic.co.uk