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Important factors affecting the risk of mold growth in well-insulated wood frame walls in Northern European climates

Mundt Petersen, Solof LU ; Harderup, Lars-Erik LU and Arfvidsson, Jesper LU (2013) Thermal Performance of the Exterior Envelopes of Whole Buildings XII In [Host publication title missing]
Abstract
Due to increased awareness of climate change and energy costs, well-insulated buildings have become more common. Furthermore, greater interest has been shown in using wood in building to produce more carbon dioxide-efficient houses. However, thicker thermal insulation in walls increases the risk of high relative humidity levels and the risk of mold-related damage in wood frame houses.

This paper presents important factors affecting the risk of mold growth in well-insulated wood frame walls in Northern European climates. Recent findings regarding important factors are first briefly summarized. The paper continues with a parametric study in which moisture-critical positions in traditional Swedish wood frame designs are investigated... (More)
Due to increased awareness of climate change and energy costs, well-insulated buildings have become more common. Furthermore, greater interest has been shown in using wood in building to produce more carbon dioxide-efficient houses. However, thicker thermal insulation in walls increases the risk of high relative humidity levels and the risk of mold-related damage in wood frame houses.

This paper presents important factors affecting the risk of mold growth in well-insulated wood frame walls in Northern European climates. Recent findings regarding important factors are first briefly summarized. The paper continues with a parametric study in which moisture-critical positions in traditional Swedish wood frame designs are investigated by using hygrothermal modeling. Traditional North European walls with insulation thicknesses of 220 mm are compared to walls with thicker thermal insulation and alternative designs. The influences of the different wall designs in relation to the risk of mold growth are compared using isopleth and a visual mold chart.

It has been found that there is a higher risk of moisture-related damage in thicker insulated walls. However, this risk could be reduced by choosing more suitable designs in which well-ventilated air gaps behind the cladding and exterior vapor-permeable moisture resistant thermal insulation boards are of great importance. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Wood framed walls, Moisture safety
in
[Host publication title missing]
editor
Karney, Richard; Desjarlais, Andre; and
pages
13 pages
conference name
Thermal Performance of the Exterior Envelopes of Whole Buildings XII
external identifiers
  • scopus:84966642122
ISBN
978-1-936504-61-9
language
English
LU publication?
yes
id
0dc8a371-4ab1-411d-8ec2-13f8791038bf (old id 5218722)
date added to LUP
2015-03-28 08:45:01
date last changed
2017-03-19 04:28:23
@inproceedings{0dc8a371-4ab1-411d-8ec2-13f8791038bf,
  abstract     = {Due to increased awareness of climate change and energy costs, well-insulated buildings have become more common. Furthermore, greater interest has been shown in using wood in building to produce more carbon dioxide-efficient houses. However, thicker thermal insulation in walls increases the risk of high relative humidity levels and the risk of mold-related damage in wood frame houses. <br/><br>
This paper presents important factors affecting the risk of mold growth in well-insulated wood frame walls in Northern European climates. Recent findings regarding important factors are first briefly summarized. The paper continues with a parametric study in which moisture-critical positions in traditional Swedish wood frame designs are investigated by using hygrothermal modeling. Traditional North European walls with insulation thicknesses of 220 mm are compared to walls with thicker thermal insulation and alternative designs. The influences of the different wall designs in relation to the risk of mold growth are compared using isopleth and a visual mold chart.<br/><br>
It has been found that there is a higher risk of moisture-related damage in thicker insulated walls. However, this risk could be reduced by choosing more suitable designs in which well-ventilated air gaps behind the cladding and exterior vapor-permeable moisture resistant thermal insulation boards are of great importance.},
  author       = {Mundt Petersen, Solof and Harderup, Lars-Erik and Arfvidsson, Jesper},
  booktitle    = {[Host publication title missing]},
  editor       = {Karney, Richard and Desjarlais, Andre},
  isbn         = {978-1-936504-61-9},
  keyword      = {Wood framed walls,Moisture safety},
  language     = {eng},
  pages        = {13},
  title        = {Important factors affecting the risk of mold growth in well-insulated wood frame walls in Northern European climates},
  year         = {2013},
}