Abstract
Recently, houses are insulated and airtight. In consequence, rooms are very humid, which cause condensate. However, the air in rooms is often very dry. So, it is important to study finishing materials added humidity control. The purpose of this study is to examine the moisture absorption–release properties of clay wall finishing materials mix in water absorptivity resin, diatomite and ALC powder. Results indicated that mixing water absorptivity resin increases amount of moisture absorption–release. In addition, mixing diatomite has the effect of speed of moisture absorption–release. Mixing ALC powder does not effect on moisture absorption–release properties.