what to put under artificial grass

3 min read 23-12-2024

Artificial grass has become increasingly popular for its low-maintenance nature and year-round green appeal. But before you roll out that lush, synthetic turf, you need to consider what goes underneath. Proper base preparation is crucial for a long-lasting, weed-free, and aesthetically pleasing lawn. This article will guide you through the essential steps and materials for creating the perfect sub-base for your artificial grass.

Preparing the Sub-Base: The Foundation for Success

The sub-base is the unsung hero of any artificial grass installation. It's the layer between the soil and your artificial turf, responsible for drainage, weed suppression, and providing a level and stable surface. Neglecting this crucial step can lead to unevenness, drainage problems, and a shorter lifespan for your artificial lawn.

1. Removing Existing Turf and Debris

Before you begin, completely remove any existing grass, weeds, and debris. This prevents weeds from growing through your artificial turf. Use a sod cutter for a clean removal or manually dig out the existing vegetation. Ensure the area is thoroughly cleared of rocks, sticks, and other obstacles that could damage the base or create unevenness.

2. Leveling the Ground

A level sub-base is paramount. Unevenness will show through the artificial grass, making it look bumpy and unprofessional. Use a rake and shovel to level the ground. Aim for a smooth, consistent surface. For larger areas, consider using a laser level for greater accuracy.

3. Weed Control Fabric: Preventing Unwanted Growth

Laying weed control fabric is a vital step. This prevents weeds from pushing up through your artificial grass, saving you from future headaches. Choose a high-quality, durable fabric designed for landscaping. Overlap the edges by at least 6 inches to prevent weed penetration.

4. Choosing the Right Base Material: Drainage and Stability

The base material you choose significantly impacts the performance of your artificial grass. Common options include:

Compacted Gravel (Type 1): Provides excellent drainage and stability. Suitable for most applications. Should be compacted thoroughly using a plate compactor.
Sharp Sand: A cost-effective option, offering good drainage but less stability than gravel. Requires thorough compaction.
A Combination: For optimal results, many installers use a combination of compacted gravel and a layer of sharp sand on top. This provides excellent drainage and a smooth, level surface.

Depth Considerations: The recommended depth for the base material is generally 50-100mm (2-4 inches), depending on the soil conditions and desired drainage. In areas with poor drainage, a thicker layer might be needed.

5. Compacting the Base

This step is crucial for preventing settling and ensuring a stable surface. Thoroughly compact the base material using a plate compactor to eliminate air pockets and ensure even distribution of weight. This prevents unevenness over time and prolongs the lifespan of your artificial grass.

6. Adding a Final Layer (Optional):

For extra smoothness and softness underfoot, some installers add a thin layer (around 10-20mm) of fine sand on top of the compacted base. This acts as a leveling layer and improves the overall feel of the artificial grass. Ensure this final layer is also compacted before installing the turf.

Answering Your Burning Questions:

Q: How important is proper drainage? A: Crucial. Poor drainage can lead to waterlogging, which damages the base and can cause the artificial grass to lift or become damaged.

Q: Can I use other materials under artificial grass? A: While gravel and sand are most common, some use recycled materials or specialized sub-base products designed for artificial lawns. Check for suitability and compatibility with your artificial grass.

Q: What if I have a sloped area? A: Slopes require careful consideration. You might need additional steps like terracing or creating level areas to ensure a stable base. Consult a professional for advice.

Conclusion: A Lasting Artificial Lawn Starts Below the Surface

Investing time in proper sub-base preparation pays dividends. A well-prepared base ensures your artificial grass looks great, lasts longer, and provides a safe and enjoyable surface for years to come. By following these steps, you can transform your outdoor space into a beautiful, low-maintenance haven. Remember to choose high-quality materials and compact thoroughly for optimal results. Consider consulting a professional landscaper if you're unsure about any aspect of the installation.