Development of the Equipment for Evaluating Moisture Buffering Effect of Building Materials by the Ventilation Capsule Method

-Measurement of Moisture Absorption and Desorption on the Wall in the Actual House-

Abstract

In recent years, the commercialization of interior materials with humidity control functions has been advancing, the conventional method for evaluating humidity control performance generally depends on the weight change of the test piece, and it could not be an evaluation method assuming application to an actual space. In this study, we focus on the principle of the ventilation capsule used in sweating systems and develop a method for directly measuring moisture absorption and desorption of building materials in the actual environment. In the previous report, the device based on the principle of the ventilation capsule was made by oneself, and the measurement accuracy was verified from the examination on the diameter of the capsule and the ventilation rate in the capsule. This paper reports the result of measuring the moisture absorption and desorption on the wall surface in the actual house using the developed equipment.