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Comparative coheating tests have been carried out in five test buildings with walls constructed of Concrete Block Masonry and timber framed Hemp-lime composite, Polyisocyanurate (PIR), Wood Fibre and Mineral Wool. Five different methods of determining heat loss coefficient (HLC) were applied during the data analysis. While some variability in HLC values was observed between the different forms of construction, the hierarchy of HLC values among the test buildings were consistent, with the Concrete Block Masonry exhibiting the highest and Wood Fibre test building exhibiting the lowest HLC values. Except for the Concrete Block Masonry, there was good agreement between the calculated HLC values and those derived by applying the method 5 where the analysis incorporated both the effects of solar radiation and thermal mass. The in-situ U-value for the Concrete Block wall, determined by the average method, was 32.8% higher than its design value, whilst the other wall systems showed marginally lower U-values than their corresponding design U-values.
Original languageEnglish
Pages (from-to)68-81
JournalBuilding and Environment
Early online date15 Sep 2016
Publication statusPublished - 15 Nov 2016


  • Coheating test
  • U-value
  • In-situ test
  • Bio-based insulation materials
  • Hemp-lime
  • Wood fibre insulation
  • Thermal Conductivity

ASJC Scopus subject areas

  • Building and Construction
  • Biomaterials

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