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Strandberg-de Bruijn, Paulien and Balksten, Kristin (2019) Energy and moisture in historic masonry walls retrofitted with hemp-lime. In: 4th international conference on innovative materials, structures and technologies (IMST 2019).


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Thermally insulating historic buildings is imperative in order to reduce energy demands of the existing building stock. Therefore an insulation material is needed that improves energy efficiency while being compatible with the existing structure from a hygrothermal, aesthetic and cultural heritage perspective. Hemp-lime is a building material that consists of on a combination of hemp shiv, the woody core part of the hemp stem, and building limes. The aim of this study was to determine if hemp-lime could be a feasible option for thermally insulating historic masonry walls in Sweden. The objectives were to measure energy performance of full-scale masonry facades insulated with hemp-lime and to monitor moisture levels inside the masonry walls. Three small single leaf masonry facades were constructed. One facade was uninsulated, the other had internal hemp-lime insulation and a third had external hemp-lime insulation. Energy use for space heating as well as temperature and relative humidity in the walls and rooms were monitored. Results show that thermally insulating historic masonry walls with hemp-lime can lead to an improvement in energy performance of 44-53 % compared to uninsulated single-leaf masonry. However, moisture levels were higher in the masonry facades that were insulated with hemp-lime.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: masonry walls, retrofit, Hemp-lime
Subjects: English
Svenska, danska, norska > Byggnadens klimatskal
Svenska, danska, norska > Byggnadens klimatskal > Isolering
Svenska, danska, norska
Depositing User: Susanna Carlsten
Date Deposited: 02 Dec 2020 09:06
Last Modified: 02 Dec 2020 09:06

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