· It is a renovation design of an old wooden flat house. · Old houses in this place near the sea are often built in a flat for wind protection. · Since this house has been built for a long time, proper repair was necessary for structure and waterproofing. · The lifestyle at the time of construction was outdated. Therefore, we had to change floor plan and increase flooring according to current lifestyle. · By increasing the heat insulation performance of the insulation material and the window, the internal space can be increased widely and hight-celling. · The internal space has been expanded by securing the structural balance while taking advantage of the existing building structure. · We carefully arranged inexpensive industrial products (such as corrugated boards and windows of ready-made items) that can be obtained easily, and construction methods (such as boarding and plastering construction) that can be accurately made.