Assertion: insulation's content | /r/HasProperty | published in wales
Facets:
Source sentences:
text: Insulation requirements are specified in the Building regulations and in England and Wales the technical content is published as Approved Documents Document L defines thermal requirements, and while setting minimum standards can allow for the U values for elements such as roofs and walls to be traded off against other factors such as the type of heating system in a whole building energy use assessment.