The special Diadomino system is suitable for holding the vegetable substrate on planted roofs with a gradient of 20 to 50 degrees. Diadomino consists of special 40x60x8 cm recycled polypropylene frames, which are fixed to each other by special recycled polyethylene bars. Between the frames there is a special notch for connecting the irrigation pipe. Diadomino is designed to be fast and easy to place, in order to stabilize the plant growth substrate and prevent erosion.