Ondřej loves nature and forests. Before having children he led a life of a modern nomad. He owned a site in the middle of the woods and always dreamt about building a cabin there. During winter he used to live in the city and in spring he relocated to his parents' cabin nearby the future building site of the house LO. He wanted his house to be connected to the surrounding nature, to be ecological, and to have his own photo chamber there, to spend his winter evenings developing his photos. He also had a clear idea about the building material. As hempcrete has never been used as a building material in the Czech Republic, it was a great challenge for me as an architect. First struggles evolved in a valuable experience and fascination with its features and its history. Building with hempcrete is easy and allows the builder to build their house on their own. Material is petrifying for several years and draws carbon dioxide from the air around during this process. Hempcrete has great insulating features, is recyclable and also resistant to pests, fire and molds.