According to the maker, they can outperform other pavements, such as pavers with fly ash, by more than tentimes. It is the first composite material in the world made almost entirely of recycled materials with the strength, durability, and natural appearance to replace concrete. The grid install system saves time and labor and the product weighs only 8.2 pounds per square versus 30-plus pounds per square for concrete permeable pavers, making them a good choice for flat and green roof applications.