Artificial grass base layer is the base paved before laying the artificial grass to ensure that artificial grass is fixed on a flat surface. The base layer is composed of 3 sub base layers. The first layer is existing soil, the second layer is made of hydrophobic gravels and the third layer can be asphalt base, gravel base or cement base, which kind of base is used depends on local climate and your budget.
Additionally, we can recommended the right base layer according to your specific conditions.