Please use this identifier to cite or link to this item:
http://hdl.handle.net/1942/33990
Title: | Thermal performance of real-life in-situ cast lime hemp walls in Flanders | Authors: | KNAPEN, Elke NEELEN, Naomi CLAES, Ilse VANDOREN, Bram JANSSENS, Bart |
Issue Date: | 2020 | Publisher: | Source: | IOP Conference Series: Earth and Environmental Science, 588, (Art N° 042049) | Series/Report: | IOP Conference Series: Earth and Environmental Science | Series/Report no.: | 588 | Abstract: | In order to meet the energy performance regulations for new buildings and to improve the energy performance of the existing building stock, a high amount of insulation materials will be needed in the coming years. Meanwhile, the demand for renewable materials and materials with a low environmental impact is increasing. In previous research, the ecological and hygrothermal potential of lime hemp as a building material has been shown. Besides incorporating a large share of renewable and fast-growing hemp shives, lime hemp combines thermal insulating properties and a high thermal inertia with a good moisture regulating behaviour. However, despite the growing interest in the material and promising lab results, the thermal performance in real conditions is still uncertain. Due to the lack of validated data for in-situ cast walls, rather conservative lambda-values for lime hemp are currently compulsory used in energy performance certification calculations in Flanders, the Flemish region of Belgium. In this paper, the results of a case study analysis of four real-life lime hemp projects are presented. The thermal performance of four dwellings with in-situ cast lime hemp walls (both new construction and renovation) is determined by in-situ measurements of the U-value. The measurements show that the in-situ U-value of the lime hemp walls is significantly better than the U-value that is calculated with the lambda-value that is currently accepted by the Flemish Energy Agency. However, drying of lime is a slow process, resulting in initially higher U-values that gradually decrease in the first months after lime hemp application. Once dried, in-situ cast lime hemp walls can meet the Flemish energy performance requirements. | Document URI: | http://hdl.handle.net/1942/33990 | ISSN: | 1755-1315 | DOI: | 10.1088/1755-1315/588/4/042049 | Rights: | Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd | Category: | A1 | Type: | Journal Contribution | Validations: | vabb 2023 |
Appears in Collections: | Research publications |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Knapen_2020_IOP_Conf._Ser.__Earth_Environ._Sci._588_042049.pdf | Published version | 1.19 MB | Adobe PDF | View/Open |
Page view(s)
70
checked on Sep 7, 2022
Download(s)
36
checked on Sep 7, 2022
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.