Before the sub-base can be laid, old turf, including roots and topsoil, must be removed. This removed soil is referred to as spoil.
How Deep and How Much?
For a garden sub-base, approximately 8–12 cm are usually excavated. For 50 m² at a depth of 10 cm, this calculates to 5 m³ of soil. Since loosened soil occupies more volume, slightly more material typically needs to be transported away.
Disposal
- Topsoil can often be reused elsewhere in the garden
- for larger quantities, plan for a container or collection service
- dispose of construction debris and roots separately
All steps after excavation are explained in our installation guide.
