Advanced

Predicting hygrothermal performance in cold roofs using a 1D transient heat and moisture calculation tool

Mundt Petersen, Solof LU and Harderup, Lars-Erik LU (2015) In Building and Environment 90. p.215-231
Abstract
Stricter Swedish building regulations require a moisture safety design process to be carried out before houses are built. In order to predict moisture-critical conditions, a properly verified, user-friendly and reliable calculation tool that could be used in this design phase, is required. This paper initially presents a blind method that could be used in order to verify hyg-rothermal calculation tools in a reliable manner. Furthermore, general results and findings from blind validations of a transient heat and moisture calculation tool carried out in cold roofs are summarized and presented. The comparisons include measurements and calculations of temperature and relative humidity and were carried out in Northern European climates. In... (More)
Stricter Swedish building regulations require a moisture safety design process to be carried out before houses are built. In order to predict moisture-critical conditions, a properly verified, user-friendly and reliable calculation tool that could be used in this design phase, is required. This paper initially presents a blind method that could be used in order to verify hyg-rothermal calculation tools in a reliable manner. Furthermore, general results and findings from blind validations of a transient heat and moisture calculation tool carried out in cold roofs are summarized and presented. The comparisons include measurements and calculations of temperature and relative humidity and were carried out in Northern European climates. In general, the results show a good correlation between measured and calculated values. Comparisons show that the studied tool can be used during the design phase to predict moisture risks. However, factors such as the influence of impaired temperature measurements on relative humidity have to be taken into account. There is also a need for outdoor climate boundary conditions that take into account critical periods. Measurements and calculations also established that the most moisture-critical conditions in general occurred in the tongued and grooved wooden roof boarding located under the roof membrane. (C) 2015 Elsevier Ltd. All rights reserved. (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
Blind, Validation, Hygrothermal, Calculation-tools, Roofs
in
Building and Environment
volume
90
pages
215 - 231
publisher
Elsevier
external identifiers
  • wos:000356189000021
  • scopus:84929333729
ISSN
1873-684X
DOI
10.1016/j.buildenv.2015.04.004
language
English
LU publication?
yes
id
586e3c7c-4db8-4017-8dfd-d6e410ab57e7 (old id 7601998)
date added to LUP
2015-07-22 15:51:08
date last changed
2017-01-01 06:19:38
@article{586e3c7c-4db8-4017-8dfd-d6e410ab57e7,
  abstract     = {Stricter Swedish building regulations require a moisture safety design process to be carried out before houses are built. In order to predict moisture-critical conditions, a properly verified, user-friendly and reliable calculation tool that could be used in this design phase, is required. This paper initially presents a blind method that could be used in order to verify hyg-rothermal calculation tools in a reliable manner. Furthermore, general results and findings from blind validations of a transient heat and moisture calculation tool carried out in cold roofs are summarized and presented. The comparisons include measurements and calculations of temperature and relative humidity and were carried out in Northern European climates. In general, the results show a good correlation between measured and calculated values. Comparisons show that the studied tool can be used during the design phase to predict moisture risks. However, factors such as the influence of impaired temperature measurements on relative humidity have to be taken into account. There is also a need for outdoor climate boundary conditions that take into account critical periods. Measurements and calculations also established that the most moisture-critical conditions in general occurred in the tongued and grooved wooden roof boarding located under the roof membrane. (C) 2015 Elsevier Ltd. All rights reserved.},
  author       = {Mundt Petersen, Solof and Harderup, Lars-Erik},
  issn         = {1873-684X},
  keyword      = {Blind,Validation,Hygrothermal,Calculation-tools,Roofs},
  language     = {eng},
  pages        = {215--231},
  publisher    = {Elsevier},
  series       = {Building and Environment},
  title        = {Predicting hygrothermal performance in cold roofs using a 1D transient heat and moisture calculation tool},
  url          = {http://dx.doi.org/10.1016/j.buildenv.2015.04.004},
  volume       = {90},
  year         = {2015},
}