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Hygrothermal Analysis of Masonry Wall with Reed Boards as Interior Insulation System

Author

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  • Kadri Keskküla

    (Institute of Forestry and Rural Engineering, Chair of Rural Building and Water Management, Estonian University of Life Sciences, F. R. Kreutzwaldi 1, Tartu 51006, Estonia)

  • Tambet Aru

    (Institute of Forestry and Rural Engineering, Chair of Rural Building and Water Management, Estonian University of Life Sciences, F. R. Kreutzwaldi 1, Tartu 51006, Estonia)

  • Mihkel Kiviste

    (Institute of Forestry and Rural Engineering, Chair of Rural Building and Water Management, Estonian University of Life Sciences, F. R. Kreutzwaldi 1, Tartu 51006, Estonia
    School of Engineering, Tartu College, Tallinn University of Technology, Ehitajate tee 5, Tallinn 19086, Estonia)

  • Martti-Jaan Miljan

    (Institute of Forestry and Rural Engineering, Chair of Rural Building and Water Management, Estonian University of Life Sciences, F. R. Kreutzwaldi 1, Tartu 51006, Estonia)

Abstract

When the masonry walls of buildings under heritage protection need to be restored and thermally improved, the only option is to use an interior insulation system. This is also the riskiest method of insulating walls in cold climates. Capillary active interior insulation systems have been proven to be the most reliable, minimizing the risk of mold growth and decay caused by condensation. They have also been proven to be less risky in wind-driven rain. The building studied is situated in a heritage-conservation area in downtown Tartu, Estonia, and therefore cannot be insulated from the exterior. This paper compares the hygrothermal performance of four different interior insulation systems with and without a heating cable and vapor barrier. In the first case, Isover Vario KM Duplex UV was placed between reed panels. In the second case, reed panels were used without the vapor barrier. Data loggers were applied between the reed panels and the original wall and inside the room to measure temperature and relative humidity in one-hour intervals. Exterior temperature and relative humidity values were taken from the Estonian University of Life Sciences Institute of Technology weather service station. In addition to the measurements taken in the case study building, calculations were made using heat-air-moisture (HAM) Delphin software to simulate the situation. The use of a smart vapor retarder (Isover Vario KM Duplex UV) with reed panels in the interior insulation system reduced the relative humidity level inside the wall. The vapor retarder improved the drying-potential compared to the interior insulation system without the vapor barrier.

Suggested Citation

  • Kadri Keskküla & Tambet Aru & Mihkel Kiviste & Martti-Jaan Miljan, 2020. "Hygrothermal Analysis of Masonry Wall with Reed Boards as Interior Insulation System," Energies, MDPI, vol. 13(20), pages 1-10, October.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:20:p:5252-:d:425645
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    References listed on IDEAS

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    1. Webb, Amanda L., 2017. "Energy retrofits in historic and traditional buildings: A review of problems and methods," Renewable and Sustainable Energy Reviews, Elsevier, vol. 77(C), pages 748-759.
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