Underneath synthetic grass in Australia, a base layer is typically required to provide stability, drainage, and a level surface. The most common materials used as a base layer for synthetic grass in Australia are:

  1. Crushed Rock: Crushed rock is a popular choice as a base layer for synthetic grass in Australia. It provides good drainage, stability, and a level surface. A layer of 75-100mm of crushed rock is typically used for residential installations, while a layer of 150mm or more may be used for commercial or high-traffic areas.
  2. Crusher Dust: Crusher dust is another common option for a base layer for synthetic grass in Australia. It is a finely crushed rock that provides good drainage and a stable surface. A layer of 50mm or more of crusher dust is typically used for residential installations.
  3. Roadbase: Roadbase is a mixture of crushed rock and clay that is often used as a base layer for synthetic grass in Australia. It provides good drainage, stability, and a level surface. A layer of 75-100mm of roadbase is typically used for residential installations, while a layer of 150mm or more may be used for commercial or high-traffic areas.
  4. Concrete: In some cases, a concrete base may be used for synthetic grass installations in Australia. This is typically done in areas where drainage is a concern, or where the ground is too soft or unstable to support the weight of the synthetic grass.

It’s important to note that the choice of base layer will depend on the specific installation site and the recommendations of the synthetic grass manufacturer and installer. It’s always best to consult with a professional installer to determine the optimal base layer for your synthetic grass installation in Australia.