Located in a Haussmannian building in the 16th arrondissement of Paris, the complete renovation of this apartment consists in opening up the space and bringing in a maximum of light by removing superfluous elements of the finishing work and enhancing the existing metal structure. Defending the use of natural materials, with a raw aspect, we proposed to combine oak coverings for the floor and the furniture with the use of terracotta tiles to partition the different spaces. Their intrinsic characteristics - solidity, insensitivity to humidity, natural regulator improving air quality - allow for a sustainable and healthy transformation of the individual metropolitan housing with a strong mineral character.