Pi House uses a red earth finish, inspired by vernacular pisé-walled homes. All photos by Hiroyuki Oki < > < > < >

In the northern mountainous provinces of Vietnam, there is a type of vernacular house called the Trinh Tuong, standing for over 100 years with rammed earth walls (a technique now known as pisé). Such walls are completely handmade by compressing earth into even and flat cubes, which allows houses to be constructed without steel reinforcement. This ancient technique helped homes to stay cool in the summer and store warmth during the winter, as well as resulting in a characteristic earthen colour.

Inspired by the pisé walls of old, the architects have named the project Pi House. This symbolises a mixture ...

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