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Thermal Performance in Timber-framed Buildings

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Used correctly in residential structures, thermal mass can moderate daily temperature fluctuations, leading to more comfortable interiors and reduce the energy used for artificial heating or cooling. If thermal mass is used incorrectly, the opposite can occur.

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Thermal Performance in Timber-framed Buildings

This Guide gives a simple step-by-step overview of housing design for greater thermal comfort.

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PDF icon WS_TDG22_Therm_Perf_TFB_July2015.pdf2.71 MB

Using Thermal Mass in Timber-framed Buildings

This guide was written following an analysis of existing rules of thumb and existing design guidance. It is based on analysis of both real-world and computer simulations of thermal mass in typical project homes and experimental structures in several Australian climates.

The project revealed the following surprising results:

  • It is possible to have too much thermal mass

  • Thermal mass is more useful in some climates than in others

  • How much thermal mass to use, and whether to use it in the floor, walls or ceiling, depends on the local climate

  • Thermal mass needs to be in one place to aid cooling and a different place to aid heating

  • The size and location of the windows has as large an influence on the thermal efficiency of a space as the quantity of thermal mass

  • Because the manufacture of many materials with high thermal mass results in high carbon dioxide emissions, the inclusion of thermal mass may actually increase rather than reduce the carbon emissions of a building, when viewed across its entire lifecycle

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PDF icon WS_TDG23_Therm_Mass_TFB_July2015.pdf2.41 MB

Thermal Performance for Timber-framed Residential Construction

The Guide includes:

  • general and climate specific considerations

  • modelled house case studies

  • principles for thermal comfort

  • useful references for further reading

AttachmentSize
PDF icon WS_TDG24_Therm_TFRC_July2015.pdf4.21 MB

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