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Energy and moisture in historic masonry walls retrofitted with hemp-lime

Strandberg-De Bruijn, P. B. LU and Balksten, K. (2019) 4th International Conference on Innovative Materials, Structures and Technologies, IMST 2019 660.
Abstract

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... (More)

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.

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author
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organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
IOP Conference Series: Materials Science and Engineering
volume
660
article number
012070
conference name
4th International Conference on Innovative Materials, Structures and Technologies, IMST 2019
conference location
Riga, Latvia
conference dates
2019-09-25 - 2019-09-27
external identifiers
  • scopus:85078305588
DOI
10.1088/1757-899X/660/1/012070
language
English
LU publication?
yes
id
c0e308a6-7809-4e43-9923-2e7eb7cb69b3
date added to LUP
2020-02-10 10:41:20
date last changed
2022-10-11 14:02:54
@inproceedings{c0e308a6-7809-4e43-9923-2e7eb7cb69b3,
  abstract     = {{<p>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.</p>}},
  author       = {{Strandberg-De Bruijn, P. B. and Balksten, K.}},
  booktitle    = {{IOP Conference Series: Materials Science and Engineering}},
  language     = {{eng}},
  title        = {{Energy and moisture in historic masonry walls retrofitted with hemp-lime}},
  url          = {{http://dx.doi.org/10.1088/1757-899X/660/1/012070}},
  doi          = {{10.1088/1757-899X/660/1/012070}},
  volume       = {{660}},
  year         = {{2019}},
}