To lay turf successfully on sand, especially where native soil is shallow, the key is to create a suitable sandy soil underlay as a base for the turf to root into.
Preparing the Base for Turf on Sand
Laying turf directly onto pure, loose sand is not ideal as it lacks nutrients and structure to support healthy root growth and retain moisture effectively. If your existing soil is not deep enough or is very poor, you need to prepare a proper sub-base.
Creating the Sandy Soil Underlay
According to Atlas Turf, when the soil is not deep, you should apply a specific sandy soil underlay before laying the turf. This material provides a better foundation for the turf roots.
- Composition: The underlay should consist of 80% sand and 20% soil. This mix provides drainage from the sand while the soil component offers some structure and nutrients.
- Depth: This sandy soil material should be laid to a depth of 100 mm. This provides sufficient depth for the new turf's roots to establish.
- Height Adjustment: The underlay should be kept 25 – 30 millimetres lower than surrounding hard surfaces like paths, driveways, or mower strips. This is crucial because the turf rolls themselves have thickness, and once laid and settled, the top of the turf will finish at about the same height as these hard surfaces.
Once the sandy soil underlay is spread to the correct depth and height, it should be leveled carefully using a rake or screed board to ensure a smooth surface. Lightly compacting the area (e.g., with a roller) can help prevent uneven settling later.
Laying the Turf
With the prepared sandy base, you can then proceed to lay the turf rolls.
- Start laying turf along a straight edge, such as a driveway or path.
- Butt the edges of the turf rolls tightly together, avoiding gaps or overlaps.
- Stagger the joins between rows, similar to laying bricks.
After Laying
After laying the turf:
- Lightly roll the area to ensure good contact between the turf and the sandy underlay.
- Water the new turf thoroughly and immediately, soaking the turf and the underlay beneath. Continue to water frequently, especially during the first few weeks, to encourage root establishment in the new base.
By creating this specific sandy soil underlay, you provide the necessary foundation for your turf to thrive even when the native soil conditions are sandy or shallow.
