Yes, sharp sand is commonly used under artificial grass as a layer of the sub-base, before laying the artificial turf. It is applied to the area before the artificial grass is installed.
Why Use Sharp Sand Under Artificial Grass?
Sharp sand offers several benefits when used as part of the sub-base for artificial grass installations:
- Drainage: Sharp sand promotes excellent drainage, preventing water from pooling beneath the artificial grass, which can lead to issues like mold and shifting.
- Stability: When compacted, sharp sand provides a stable and level surface for the artificial grass to rest upon. This helps prevent dips and unevenness in the lawn.
- Firm Foundation: It creates a firm base, reducing the likelihood of movement or sinking over time.
- Weed Prevention: While not a complete solution, a layer of sharp sand can help deter weed growth from below.
How to Use Sharp Sand for Artificial Grass:
- Excavation: Excavate the area to the required depth, typically around 75-100mm (3-4 inches).
- Weed Membrane (Optional): Lay a weed membrane to further prevent weed growth.
- Sub-Base (Crushed Aggregate): Install a layer of crushed aggregate (e.g., MOT Type 1) to a depth of approximately 50-75mm (2-3 inches). This provides a solid foundation. Compact thoroughly using a plate compactor.
- Sharp Sand Layer: Spread a 10-15mm (approximately 1/2 inch) layer of sharp sand evenly over the compacted sub-base.
- Compaction: Compact the sharp sand layer thoroughly using a plate compactor. This will create a smooth, level, and stable surface.
- Leveling: Ensure the surface is perfectly level before laying the artificial grass.
- Artificial Grass Installation: Install the artificial grass according to the manufacturer's instructions.
Important Considerations:
- Compaction is Key: Proper compaction of both the sub-base and the sharp sand layer is crucial for a successful installation.
- Depth: The depth of the sharp sand layer may vary depending on the specific requirements of the artificial grass and the underlying soil conditions.
- Alternatives: While sharp sand is common, other materials such as granite dust or grano can also be used.
