A drainage layer is laid which corresponds to the type of traffic which will access the surface. A geotextile layer follows to support the ground and to stop the drainage layer stone migrating up to the surface. A root-zone layer is then laid, typically 60mm deep. This allows the grass to firmly anchor under the grid system and establish properly.
The grids are then laid and filled with either sandy loam or a mixture of topsoil and sharp sand 70:30, filled to approximately 80% depth. The seed is then evenly spread throughout the surface. Amount of grass seeds are directly equal to the amount that would be placed to seed an ordinary lawn. After this, a roller or plate compactor firms up the infill and then the infill is topped up. If conditions are dry, the surface must be kept watered.
Ensure traffic is kept to a minimum until the seed has properly established itself.