Tumbling Roof House

　Surrounded by high embankments of the Kiso River, the Wachu area has areas where the land level is lower than the river. The site is about 1m higher than the level of the fields, and the first floor is raised about 1m, and the RC part is up to the waist of the first floor as a measure against flooding. Because there was enough room on the site, it was a large-scale living space with a total floor area of ​​300㎡, but it was a two-story volume long in the east and west, and all the rooms were lit on the south side.

On top of that, I thought about how to make the overall shape this time. As for the floor plan, in addition to the south facing lighting, we adopted a radial pattern from the direction of the view. The living room on the 2nd floor needs a high opening that overlooks the countryside below, while the private rooms do not need that much air volume, but the shape and height of the wooden roof change each time. The area is increased, the thermal efficiency is deteriorated, and the loss of materials is also large. Rain is dropped on the east and west ends, and the necessary areas are greatly lifted, and the overall shape is parametric, with the slope changing like the undulations of the terrain. Furthermore, you can enjoy the fireworks festival held on both the Kiso River and the Nagara River from the opening of the raised gap created by making a gap in a part of the roof.

While conscious of the power from the land, we actively incorporated the power of the sky such as light, wind and rain. Buildings in which the ground rises and rises to the sky are heteronomous, yet have their own unique geometry and distinctive forms. As a result, the resulting ceiling, which is gentle yet inflected, has a shape that visualizes the movement of energy, giving a lively reflection of natural light that differs from a rectangular ceiling. It became a house built on a balance between popular local wooden construction techniques and computer-controlled design.

The framework will be a conventional framework, and in the initial plan, in collaboration with Mr. Yanagimuro, small members will be gathered together to form a continuous surface, the shell effect will be examined, and the undulating shape of the micro-topography will be controlled by an algorithm. rice field. However, due to the larger opening, the span in the east-west direction became longer than expected. However, in the central part of the roof that is turned over, the shape of the crack is used as part of the truss, and the number of pillars in the east-west direction is reduced.