Recently, steel-framed houses began to be built even in Japan because of rise in timber price. A technology for building them has been mainly developed in warm regions, such as California and Florida. So the technology has to be verified and to be improved according to climate and custom of Japan if necessary. The paper discusses thermal insulation, moistureproofing and air-tightness of the steel-framed houses on basis of field data, which were measured in steel-framed houses existing in Japan.
