Yoshichika Takagi + Associates has developed an extension and reconstruction of a "Deformed roof house," representative typology of houses on the island of Hokkaido, known for its pleasant and picturesque rural landscapes.

The house of 96,47m² works as a shared unit with a nature similar to an agricultural greenhouse, which has a terrace, a wind protection room and access area.
The base of this project was to pass this “Deformed Roof” house, down to the next generation. Yoshichika Takagi + Associates layer the plan to the decided construction design, a misalignment arose in the terrace and opening, which led to the appearance of an upgraded manneristic dimension.

Like the relationship between the modern and the postmodern in history, placing the houses of "Deformed Roof" in the houses of "Triangular Roof" occurs as part of the historical process of the place.
 

Description of project by Yoshichika Takagi + Associates

This project consists of renovating a house, built in 1974, into a two-family house. Its’ current figure is a result of going through extensions and reconstructions twice. Housings such as these which are called “Deformed Roof” houses can be seen often in Hokkaido, but not outside of this particular island. They are a vernacular and anonymous kind of design, but that fact does not deny that they would be difficult to call beautiful.

Looking back on the modern history of the local houses “Minka” in Hokkaido, the style of “Triangular Roof” houses was established in the period of 1950’s- 1960’s. The period of “Deformed Roof” houses followed that, and lasted for about 10years after the 1960’s. When researching about the reasons of the style change, it is possible to assume by circumstantial evidence, but cannot reach the most important point, which is the motive.

Considering from a different point of view, such as human history, it can be outlined by saying that it is mannerism, which is defined as a divergence from the legitimate style, and a concept that humans repeat historically, rather than a “concept of an independent style,” such as Renaissance style. Like the relationship between modern and post-modern in history, to place “Deformed Roof” houses towards “Triangular Roof” houses would not be so inexplicable. The base of this plan was to pass this “Deformed Roof” house, which can be said as a conceit in Hokkaido “Minka” history, down to the next generation.

The house was renovated so that the parent household would be on the 1st floor and the child household on the 2nd floor, and also extension was done to fulfill the necessary rooms. Since insulation improvement and structural reinforcement was also required, the house was disassembled to its’ frames, and was extended for 1 “ken (a Japanese unit, 1 ken=1,820mm)” on the gable end, tracing the form of the deformed roof. The extended part softly connects the parent household and child household, and also functions as a share unit with an agricultural greenhouse-like nature, possessing features of a terrace, windbreak room, and an all access area.

It is also a “doma (dirt floor)”, which is essential for farmer households in Japan, and is also a cross-section space for work and living. Extension cost was reduced by making it a half-outdoor space. In the structure of the extended part, a pillar is placed by 105mm ×180mm x 1.820mm, and by receiving the wind pressure resistance by the longitudinal pillar, the horizontal member was excluded. By layering the plan (rather forcefully) to the decided construction design, a misalignment arose in the terrace and opening, which led to the appearance of an upgraded manneristic dimension.

“Triangular Roof” houses

The features are

1) Concrete block constructed.
2) The living room placed at the center, no corridors in the floor plan.
3) The roof built by wood by gradient method and sheet-metal finished, in order to make it easier for the snow to fall off.


The background for such features is that in order to get financial aids, the house had to be built following the “Hokkaido Cold-Proof Housing Construction Acceleration Ordinance" (established 1953) . By following the ordinance, houses were placed at the center of building sites, creating beautiful streets with a kind of rhythm in the homogenously divided residential lots.

Deformed Roof” houses

There are several patterns in the shapes of “Deformed Roofs”, and all are roofed by sheet-metal. One of the reasons of modal alteration from “Triangular Roofs” is that the range of financing was expanded to wooden houses, allowing more freedom to the design. Another is the advancement of sheet-metal technology, which made it possible to build roofs in a more complex figuration. Nonetheless, it cannot be expressly said that that the driving force of this design is the technical improvement of “Triangular Roof” style.

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Venue Location
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Furano, Hokkaido, Japan.
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Builder
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Daisuke Hasegawa (Daisuke Hasegawa & Partners).
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Yoshichika Takagi is a young Japanese architect, he was born in 1975 in Sapporo, on the island of Hokkaido, Japan. He graduated from Hokkai-Gakuen University in 1998. Takagi attended the Architectural Association School of Architecture between 2000 and 2001. In the period 2005 - 2012 he worked at Sekkei-sha inc. and 4 years in the Norisada Maeda workshop.

In 2010, Takagi received the 2010 RUNNER-UP AR Prize for Emerging Architecture (UK). Finally in 2012 he founded "Yoshichika takagi + associates". Today, Yoshichika is also a part-time professor at Hokkai-Gakuen University and the Hokkaido Institute of Technology.

Until now Takagi has mainly dealt with residential architecture, even with works of an experimental nature. In these, a remarkable sensitivity emerges, both in terms of the functional management of the space and the harmony of the whole. The essentiality of the background and the use of light colored materials are appreciated in his projects.
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