This building is a textbook example of the possibilities of using hempcrete for the renovation of old buildings and structures. Hemp building materials can improve the bearing surfaces, which are not only "breathe", but also retain heat in winter and cool in summer without whatever additional financial or energy costs.
The architects and builders of one of the most famous French companies were supplied rather unusual job - to carry out reconstruction of the building of the 18th century, standing on one of the oldest streets in the central district of Paris - Rue de la Huchette. In order to demonstrate the relationship of the French to the street, which is one of the major tourist attractions of the capital, just to mention that it rests on the Notre Dame Cathedral (better known as Notre-Dame de Paris).
For centuries, this building was residential, but age makes itself felt and to the reconstruction of the inner surfaces of historic buildings look like this, as demonstrated below.

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Overhaul at home based on the concept that instead of living quarters, ten studios will be located in front of the building. The main idea of ​​the project was the thesis - renovation without deterioration of the external appearance of the building. It was in his inimitable style building known and loved by the French and visitors to the city, and above all such complex structures are formed with nothing unique appearance of the Saint-Michel.
To the building retained the exact shape of the 18th century and could be upgraded with the latest construction technology, the architects have proposed a management company that works with more than 55 thousand buildings, used as a building and insulation material-the-art technologies and materials, based on the properties of hemp ingredients. In order to maximize the insulation walls of premises from the effects of external factors and climatic conditions, the customer agreed on the desirability of using in the course of construction works arbolita hemp and other building materials made on the basis of hemp.
According to the management company, hemp building materials were chosen for several reasons, the main ones are:
- The ability to smooth out temperature fluctuations in the cold and hot seasons. Thus, cannabis does not allow high or low temperatures have a negative impact both on the building and the people who are in it will work or live;
- The possibility, due to its mechanical properties, control humidity levels, which significantly affects the buildings with centuries of history;
- Antibacterial, antiseptic qualities of hemp building materials creating a "friendly environment" inside the building (in the central part of the city for this kind of comfort, customers are willing to pay).

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According to the architectural firm responsible for the construction work, "This building is a textbook example of the possibilities of using hempcrete for the renovation of old buildings and structures. Hemp building materials can improve the bearing surfaces, which are not only "breathe", but in the summer and retain heat in winter and cool without however any additional financial expenditure of energy. "
According to ecologist engineer hired in the project, hemp hempcrete increases the permeability - Water vapor and carbon dioxide accumulating in the room, hemp walls capable of absorbing and "throw" out. In addition, hempcrete does not violate the clutch, the position of the builders of the 18th century, while ensuring the impossibility of thermal bridges, because that leaves the building warm in winter and summer heat penetrates it.

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During the project, the builders cleared the bearing surface of the building not only from the debris and various finishing materials, they are "smoothed out" all that is possible, leaving only the skeleton to work (masonry). After the bearing surfaces were as well prepared and strengthened by means of special construction technology, building has begun the process of protection by coating the walls of various types hemp building mixes - hempcrete, plaster, paint on the basis of hemp, etc.
As a result of the work load-bearing walls of the building are covered only hemp plaster thickness of 1.5 cm and a 10 cm layer of hempcrete. Accordingly, the masonry is 40 cm. On the outer surface of the old masonry coated hemp plaster thickness of 4 cm and 2 cm layer of decorative mixture, making it possible to fully replicate the appearance of the building, which the citizens and visitors of Paris known for the past 3 centuries. With such a thickness of the bearing surface, hemp building materials allow the construction of a building to meet modern requirements of the Parisian buildings, namely, does not exceed the value of 80 kWh / m2 / year.
Comment of the Association "Ukrainian industrial hemp"
In September 2016, after a rather long period of reconstruction, the building tenants began to rapidly fill completely changed inside an ancient building, which remains completely outside the way it has been for the last 3 centuries. It is this kind of construction technology demonstrates the ability of the renovation of old buildings with modern natural building materials capable of stone buildings of the 18th century converted into a modern, environmentally friendly, friendly to the human body structure. And the reconstructed historic buildings not only retain their foreign authenticity, but also fully consistent with modern European building requirements for thermal conductivity, water vapor permeability, noise reduction and dozens of construction parameters that are not yet applied in the Ukrainian building vaults and regulations.
The appearance of the building on the street Rue de la Huchette
            before reconstruction                    after the completion of construction works

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Information taken from the site