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Estimation of mould growth levels on rendered facades based on surface RH and surface temperature measurements

Johansson, Sanne LU ; Wadsö, Lars LU and Sandin, Kenneth LU (2010) In Building and Environment 45. p.1153-1160
Abstract
Many façades made with thin rendering on thermal insulation have problems with biological growth. In this study surface temperature and surface RH were monitored over a 20 month period on test house façades with different constructions (thermal inertia), surface color and compass directions. This data were used to test three theoretical indices of biological growth with the aim of indicating the potential of mould growth on different types of rendered façades. The result show that thin renderings on thermal insulation have significantly higher surface humidities compared to façade constructions with higher thermal inertia and therefore have a higher potential for mould growth. The color is the most important factor for the surface humidity... (More)
Many façades made with thin rendering on thermal insulation have problems with biological growth. In this study surface temperature and surface RH were monitored over a 20 month period on test house façades with different constructions (thermal inertia), surface color and compass directions. This data were used to test three theoretical indices of biological growth with the aim of indicating the potential of mould growth on different types of rendered façades. The result show that thin renderings on thermal insulation have significantly higher surface humidities compared to façade constructions with higher thermal inertia and therefore have a higher potential for mould growth. The color is the most important factor for the surface humidity levels on south facing façades (on the northern hemisphere) as darker surfaces absorb more solar radiation and therefore have a higher average temperature. On a north facing façade the heat storage capability of the façade and its effect on the surface temperature is most import (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
facade, ETICS, mould growth, Rendering, moisture, temperature
in
Building and Environment
volume
45
pages
1153 - 1160
publisher
Elsevier
external identifiers
  • wos:000274835800007
  • scopus:74249120851
ISSN
1873-684X
DOI
10.1016/j.buildenv.2009.10.022
language
English
LU publication?
yes
id
666aeda6-6024-45ed-8067-356d554c00fc (old id 1542791)
date added to LUP
2010-03-24 11:33:14
date last changed
2018-06-17 04:02:48
@article{666aeda6-6024-45ed-8067-356d554c00fc,
  abstract     = {Many façades made with thin rendering on thermal insulation have problems with biological growth. In this study surface temperature and surface RH were monitored over a 20 month period on test house façades with different constructions (thermal inertia), surface color and compass directions. This data were used to test three theoretical indices of biological growth with the aim of indicating the potential of mould growth on different types of rendered façades. The result show that thin renderings on thermal insulation have significantly higher surface humidities compared to façade constructions with higher thermal inertia and therefore have a higher potential for mould growth. The color is the most important factor for the surface humidity levels on south facing façades (on the northern hemisphere) as darker surfaces absorb more solar radiation and therefore have a higher average temperature. On a north facing façade the heat storage capability of the façade and its effect on the surface temperature is most import},
  author       = {Johansson, Sanne and Wadsö, Lars and Sandin, Kenneth},
  issn         = {1873-684X},
  keyword      = {facade,ETICS,mould growth,Rendering,moisture,temperature},
  language     = {eng},
  pages        = {1153--1160},
  publisher    = {Elsevier},
  series       = {Building and Environment},
  title        = {Estimation of mould growth levels on rendered facades based on surface RH and surface temperature measurements},
  url          = {http://dx.doi.org/10.1016/j.buildenv.2009.10.022},
  volume       = {45},
  year         = {2010},
}