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Importance of a Proper applied Airflow in the Façade Air Gap when Moisture and Temperature are Calculated in Wood Framed Walls

Mundt Petersen, Solof LU and Harderup, Lars-Erik LU (2010) 5th International BUILDAIR-Symposium on Building and Ductwork Air thightness In Reader manual: 5th International BUILDAIR-Symposium on Building and Ductwork Air thightness (former “European BlowerDoor-Symposium”) October 21-22, 2010, Kgs. Lyngby near Copenhagen, Denmark p.37-37
Abstract
The airflow in the air gap behind the façade panel has shown to be of importance when risks of moisture and mould damages in wood frame walls are calculated. This study demonstrates the importance of a properly applied outdoor air flow in the air gap behind the façade panel when temperature and moisture conditions are calculated. The paper present and compare how variations in airflow in the air gap influence temperature and moisture conditions in a modern Swedish wood framed wall. Different references present various air flows that are adapted in the air gap. Calculations are made in the one dimensional temperature and moisture calculation program WUFI 4.2. The results shows that the air flows in the air gap behind the panel affect... (More)
The airflow in the air gap behind the façade panel has shown to be of importance when risks of moisture and mould damages in wood frame walls are calculated. This study demonstrates the importance of a properly applied outdoor air flow in the air gap behind the façade panel when temperature and moisture conditions are calculated. The paper present and compare how variations in airflow in the air gap influence temperature and moisture conditions in a modern Swedish wood framed wall. Different references present various air flows that are adapted in the air gap. Calculations are made in the one dimensional temperature and moisture calculation program WUFI 4.2. The results shows that the air flows in the air gap behind the panel affect relative humidity in all positions outside the vapour retarder. At the same time temperature in the whole construction and relative humidity inside the vapour retarder is not affected by different air flows in a significant way. The conclusion is that a correct airflow in the façade air gap is of importance for calculated moisture conditions in modern Swedish wood constructions. An incorrect air flow can also give significant errors for calculated moisture conditions. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Wood Framed Walls, Airflow, Air gap Moisture calculations, WUFI.
in
Reader manual: 5th International BUILDAIR-Symposium on Building and Ductwork Air thightness (former “European BlowerDoor-Symposium”) October 21-22, 2010, Kgs. Lyngby near Copenhagen, Denmark
editor
Rosenthal, Bernd
pages
9 pages
publisher
Energie und Umweltzentrum am Deister GmbH (e.u.[z.]), Germany
conference name
5th International BUILDAIR-Symposium on Building and Ductwork Air thightness
language
English
LU publication?
yes
id
bd5a8faa-0b52-41f0-a93f-73b278590372 (old id 5211981)
date added to LUP
2015-03-27 09:27:37
date last changed
2016-04-16 09:02:21
@misc{bd5a8faa-0b52-41f0-a93f-73b278590372,
  abstract     = {The airflow in the air gap behind the façade panel has shown to be of importance when risks of moisture and mould damages in wood frame walls are calculated. This study demonstrates the importance of a properly applied outdoor air flow in the air gap behind the façade panel when temperature and moisture conditions are calculated. The paper present and compare how variations in airflow in the air gap influence temperature and moisture conditions in a modern Swedish wood framed wall. Different references present various air flows that are adapted in the air gap. Calculations are made in the one dimensional temperature and moisture calculation program WUFI 4.2. The results shows that the air flows in the air gap behind the panel affect relative humidity in all positions outside the vapour retarder. At the same time temperature in the whole construction and relative humidity inside the vapour retarder is not affected by different air flows in a significant way. The conclusion is that a correct airflow in the façade air gap is of importance for calculated moisture conditions in modern Swedish wood constructions. An incorrect air flow can also give significant errors for calculated moisture conditions.},
  author       = {Mundt Petersen, Solof and Harderup, Lars-Erik},
  editor       = {Rosenthal, Bernd},
  keyword      = {Wood Framed Walls,Airflow,Air gap Moisture calculations,WUFI.},
  language     = {eng},
  pages        = {37--37},
  publisher    = {ARRAY(0x50cadd0)},
  series       = {Reader manual: 5th International BUILDAIR-Symposium on Building and Ductwork Air thightness (former “European BlowerDoor-Symposium”) October 21-22, 2010, Kgs. Lyngby near Copenhagen, Denmark},
  title        = {Importance of a Proper applied Airflow in the Façade Air Gap when Moisture and Temperature are Calculated in Wood Framed Walls},
  year         = {2010},
}