Measurements of water vapour permeability of oriented strand boards

Oriented strand boards (OSB) are one of the most used elements in modern timber-based buildings. An important property is their permeability to water vapour. It is commonly characterized by the diffusion resistance factor ( μ -value). It is not a constant, but a moisture-dependent function that is m...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. Conference series 2022-09, Vol.2341 (1), p.12016
Main Authors: Stanek, K, Richter, J, Pavlickova, N
Format: Article
Language:English
Subjects:
Building envelopes
Moisture content
Moisture effects
Moisture resistance
Permeability
Physics
Resistance factors
Water vapor
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Oriented strand boards (OSB) are one of the most used elements in modern timber-based buildings. An important property is their permeability to water vapour. It is commonly characterized by the diffusion resistance factor ( μ -value). It is not a constant, but a moisture-dependent function that is most often determined using the cup method. However, results found in the literature have large variance. This paper presents the results of carefully performed laboratory measurements using the cup method. Measurements were made at different sorption moisture contents of OSB. The measured μ -values ranged from 40 for samples with high moisture content to 160 for samples with low moisture content. The measured values were used to derive moisture-dependent functions that cover the entire hygroscopic range. They can be used in hygrothermal modelling of building envelopes containing OSB.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2341/1/012016