Yes, it is common practice to put sand under synthetic grass to provide stability and improve drainage. The sand acts as a weight to hold the grass in place, preventing it from shifting or wrinkling. Additionally, the sand helps to improve drainage by creating a permeable layer that allows water to flow through to the soil below.
The amount of sand needed will depend on the specific installation and the type of synthetic grass being used. In general, a layer of 1-2 inches of sand is recommended, although this may vary depending on the condition of the soil and the level of foot traffic the area will receive.
It’s important to note that while sand is a common component of synthetic grass installations, it is not always necessary. In some cases, such as installations on concrete or asphalt, a sand layer may not be needed. It’s always best to consult with a professional installer to determine the specific requirements for your installation.