The cup method is applied for the measurement of water vapor transport properties of porous materials worldwide. However, in practical applications the experimental results are often used without taking into account some secondary effects which can play an important role under specific conditions. In this paper, the effect of temperature on water vapor transport properties of cellular concrete is studied, together with the influence of sample thickness. At first, the bulk density, matrix density, total open porosity and sorption and desorption isotherms are measured for material characterization purposes. Then, the steady state cup method is used for determination of water vapor transport properties, whereas the measurements are performed at several temperatures and for three different sample thicknesses.
 M. Krus, Moisture Transport and Storage Coefficients of Porous Mineral Building Materials. Theoretical Principles and New Test Methods. Fraunhofer IRB Verlag, 1996.
 R. Černý (ed.), Complex System of Methods for Directed Design and
Assessment of Functional Properties of Building Materials: Assessment
and Synthesis of Analytical Data and Construction of the System. Czech
Technical University in Prague, Prague, 2010.
 O. Krischer, Die wissentschaftlichen Grundlagen der
Trocknungstechnik. Springer Verlag, Berlin, 1963.
 P. Mukhopadhyaya, M. K. Kumaran, J. Lackey, “Use of the modified
cup method to determine temperature dependency of water vapor
transmission properties of building materials”, J. Test. Eval., vol. 33, pp.
 A. Tveit, Measurements of Moisture Sorption and Moisture
Permeability of Porous Materials, Norwegian Building Research
Institute, Report 45. Oslo, 1966.
 L. Piergiovanni, P. Fava, A. Siciliano, “A Mathematical Model for the
Prediction of Water Vapour Transmission Rate at Different Temperature
and Relative Humidity Combinations”, Packag. Tech. Sci., vol. 8, pp.
 P. W. Gibson, “Effect of temperature on water vapor transport trough
polymer membrane laminates”, Polym. Test., vol. 19, pp. 673-691,
 R. J. Osczevski, “Water vapor transfer through a hydrophilic film at
subzero temperatures”, Text. Res. J., vol. 66, 1996.
 D. Wildenschild, J. J. Roberts, “Experimental Tests of Enhancement of
Vapor Diffusion in Topopah Spring Tuff”, J. Porous Media, vol. 4, pp.
 J. R. Philip, D.A. de Vries, “Moisture movement in porous materials
under temperature gradients”, Trans. Am. Geophys. Union, vol. 38, pp.
 M. Pavlíková, Z. Pavlík, M. Keppert, R. Černý, “Salt transport and
storage parameters of renovation plasters and their possible effects on
restored buildings' walls”, Const. Build. Mat., vol. 25, pp. 1205-1212,
 M. Jiřičková, Application of TDR Microprobes, Mini-tensiometry, and
Minihygrotmery to the Determination of Moisture Transport and
Moisture Storage Parameters of Building Materials, CTU Press, Prague,
 D. Burnett, A. R. Garcia, M. Naderi, M. Acharya, “Vapour Sorption
Properties of Building Materials Using Gravimetric Sorption
Instrumentation – an Overview. Application Note 104. Surface
Measurement Systems, 2009.
 Z. Pavlík, J. Žumár, I. Medveď, R. Černý, “Water vapor adsorption in
porous building materials: experimental measurement and theoretical
analysis”, Transport Porous Med., vol. 91, pp. 939-954, 2012.
 R. Schirmer, “Die Diffusionszahl von Wasserdampf-Luft-Gemischen
und die Verdampfungsgeschwindigkeit“, Beiheft VDIZeitschrift,
Verfahrenstechnik 6, pp. 170-177, 1938.