Abstract
The purpose of this paper is to analyze the percentage of the water content of the wooden frames and the airtightness of the house which was built by the construction method with vaporproof/airtightness and thermal insulation from the outside of the wooden frames. The results of this study were as follows : 1) The percentage of the water content of the wooden frames fell rapidly in about one year after moving-in. It was less than 15 % at all measurement points, which means that there was little danger of rotting. 2) The effective open area of the house was 346 cm2 after two years. But that fell to 315 cm2 after the windows were sealed. This means that the windows were the cause of the decline in airtightness.
