Hygrothermal Performance of Timber External Walls Insulated with Natural and Industrial Materials

  • Martti-Jaan MiljanEmail author
  • Jaan Miljan
Conference paper
Part of the Springer Proceedings in Energy book series (SPE)


The test house with special timber structure was built by the department of rural building of Estonian University of Life Sciences. The hygrothermal properties of sawdust and cellulose, used as insulation materials in building envelope, were investigated in long term. The test was carried out during four winters. The wind and moisture-vapor barriers were not applied in the first testing period. In the second testing period the wall was covered inside with the moisture barrier and outside with the wind barrier and the layer of OSB plates. In wintertime the test house was heated with electric batteries to keep the indoors temperature stable. The aim of this research was to measure and determine the thermal transmittance of differently insulated wall sections. To fulfil the task the devices to measure relative moisture and temperature were placed in five different positions (in three depths inside the insulation) and indoors and outdoors. The heat flux plates were applied on the inner surface of the wall. Data were recorded with 10 min interval. The analysis of these test periods was carried out and presented in this paper.


Thermal insulation Thermal transmittance Hygrothermal performance Sawdust Cellulose insulation 



The building of the test house was supported by Ministry of Education and Research as a part of the research “Assessment, analysis and modelling of environmental sustainability of buildings life cycle” (2008–2012).

This article was supported by the Estonian Center of Excellence in Zero Energy and Resource Efficient Smart Buildings and Districts, ZEBE, (2014–2020) funded by the European Regional Development Fund.


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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Estonian University of Life SciencesTartuEstonia

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