The present invention concerns a precultivated lawn with a light structure comprising:- a superficial lawn layer (1), of natural kind, consisting of vegetal species for a lawn, grass coverings or flower coverings；- a synthetic growing substratum (2), consisting of stringy residuals derived from the working of cloth materials like wool, cotton, silk, felt and other materials, compressed and mutually heat bonded without using resins, glues, solvents or similar substances.This kind of lawn allows the realization of permanent or temporary grass coverings on natural soil or on different surfaces like asphalt, cement, rubber, wood or other.Furthermore, it allows the realization of ornamental coverings on roofs, lofts and internal as well as external walls of public and private buildings indirectly causing a favourable increase of the heat insulation of said buildings due to the synthetic materials forming its growing substratum.
