Prehistoric petrified wood was the model for the charming use of form and materiality of this elegant surface covering made of concrete planks. The width measurements of 16, 18, 20 and 22 cm adopt the standard sizes of the wood industry, while the length of 250 cm demonstrates the options offered by concrete as a sustainable material. These planks can be laid loose in areas with no traffic in joint widths of 5-10 mm or in a water-permeable format on loose superstructures. A supporting substructure is not necessary. Heading joints can be arranged as desired.