a branch of architecture that uses low environmental impact materials thus reducing the chemical-physical and electro-magnetic pollution. Bio-architecture examines every single possible method and measure to prevent and avoid damage to the eco-system, the risks to physical and mental health of people living in a building (from the people who are building it to the people who will eventually end up using it) and in general, it considers the relationship with the local, regional and global environment.

these features concern the resistance to loads (for example the weight of people, of furniture, of means of transport on a floor) that the tiles surface must withstand. They are called “bulk mechanical” features since they concern the whole tile and in order to distinguish them from “surface” features, which concern only the working surface of the tile.