抄録
One of the characteristics of houses in Honshu is that they are open to the outside. On the other hand, the houses in Hokkaido must be closed to the outside because of its cold and deep-snow climate. But most houses in Hokkaido are still constructed by the method originally developed in Honshu, by which it is impossible to make a continuous vaporproof layer. Consequently, they are also weak in airtightness. If the vaporproof layer is not continuous, the wooden frame may be in danger of moisture condensation which shortens the life of a house. The purpose of this research is to look for a construction method which will ensure the execution of a vaporproof and thermal insulation layer. In this report we propose a construction method for a sure vaporproof/airtightness and thermal insulation layer from the outside of the wooden frame, by presenting an example of the house built by our method. The results of this study were as follows ; (1) The time spent for construction was 58 clear days which were about 14〜15 days more than in the conventional methods. The construction expenses were about 600,000 yen more. (2) The effective open area of this house measured 296cm^2, which was much less than that of the conventional methods. This means that this method provides a good airtightness.
