Moisture permeability measurement using a surface air dew-point probe: a feasibility study
- 1 February 2002
- journal article
- research article
- Published by SAGE Publications in Building Services Engineering Research and Technology
- Vol. 23 (1), 7-18
- https://doi.org/10.1191/0143624402bt025oa
Abstract
Moisture permeability of building materials is essential information to predicting moisture transfer in buildings. The conventional way of measuring the permeability of a material is the standard cup test method, which is very time consuming. The paper describes an investigation into the feasibility of using a surface air dew-point probe (SADP), which was first designed by Tsuchiya, to significantly shorten the measurement time. An analysis is presented to show the degree of accuracy required of the measurement of the moisture content changes of the air flowing through the SADP in order that accurate measurement of permeability can be achieved. The requirement, however, may not be achievable with the dew-point temperature sensors currently available. An experimental method for solving this problem is suggested, based on experience gained in trial experiments.Keywords
This publication has 1 reference indexed in Scilit:
- Nonisothermal moisture diffusion in porous building materialsBuilding Research & Information, 1998