Thermal conductivity of walls insulated with natural materials
2013
Miljan, M.-J., Estonian Univ. of Life Sciences, Tartu (Estonia). Dept. of Rural Engineering | Miljan, M., Estonian Univ. of Life Sciences, Tartu (Estonia). Dept. of Rural Engineering | Miljan, J., Estonian Univ. of Life Sciences, Tartu (Estonia). Dept. of Rural Engineering
Using of natural renewable and recyclable materials enables us to construct a comfortable space to live in. The aim of this investigation was to research thermal transmittance and relative humidity of wall fragments with different structures and insulation. Tested wall fragments were built into window openings of an actual outside wall. All the materials used were natural: wood, lightweight clay blocks, reed and straw bales, loose hemp chips and reed. Walls were rendered with clay plaster. Thermal transmittance and relative humidity were measured in four different wall structures during two years. Sensors for measuring temperature and humidity were placed at several points, for one item between the insulation and clay plaster layers. On the basis of the research it may be concluded that it is possible to fulfil minimum energy performance requirements using natural insulation materials and based on the values of the observation period it can be concluded that there was no water condensation in the wall structure. Therefore there was no threat of biodegradation.
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