Installing artificial grass is one of the smartest investments for creating a low-maintenance, green space that looks fantastic all year round. Artificial grass offers aesthetic appeal, durability, and easy care, whether for a home garden, school playground, office courtyard, or sports field. However, even the highest-quality artificial turf will underperform if laid over an unprepared or unstable base.
So, what is the best thing to put under artificial grass to ensure long-term success? The answer lies in selecting the right sub-base materials and preparing the ground correctly. This comprehensive guide takes you through the step-by-step process of preparing your base and choosing the best underlay for artificial turf.
Why Base Preparation Matters
Proper base preparation is crucial to the longevity and appearance of your artificial grass. A poorly constructed base can result in drainage issues, weed growth, surface irregularities, or premature wear.
Benefits of Proper Base Preparation
- Ensures excellent drainage
- Prevents shifting and wrinkling of turf
- Enhances comfort and softness underfoot
- Keeps weeds from penetrating
- Provides a stable, even surface
Step 1: Removing the Existing Ground Cover
Before laying your artificial grass, you’ll need to clear the area of its current surface, whether it’s natural grass, paving, gravel, or concrete.
How to Remove Existing Ground Cover
- Mark out the area for installation using string lines or spray paint.
- Remove grass and roots with a turf cutter or spade to a 70-100 mm depth.
- Clear debris and rocks that may interfere with levelling.
- Apply a weed membrane to prevent future weed growth.
- Compact the soil to create a firm foundation using a plate compactor.
Step 2: Choosing the Best Base Material for Artificial Grass
Now that your area is cleared and compacted, it’s time to choose the ideal base layer. The base acts as a drainage medium, prevents ground movement, and provides a level foundation.
Recommended Base Materials
Crushed Granite or Crusher Dust (G5-G7) – Best Overall Choice
- This finely graded material compacts well and provides excellent drainage.
- Apply 60-100 mm and compact in layers.
- Suitable for residential and commercial installations.
Decomposed Granite
- Another premium option that creates a smooth, water-permeable base.
- Easy to level and offers solid support for turf.
Gravel and Sand Combo
- A layer of gravel (for drainage) topped with coarse river sand (for levelling).
- Ensure the sand layer is no more than 10-20 mm to avoid shifting.
Concrete or Asphalt (for Rooftops & Patios)
- Ideal for installations over hardscapes.
- Add a shock pad or foam underlay for cushion and comfort.
Step 3: Installing the Sub-Base
After selecting your material, follow these key steps:
- Spread the base material evenly over the area.
- Level the surface using a rake and screed board.
- Compact the material thoroughly with a mechanical compactor.
- Apply a final layer of fine sand or crusher dust (10–20 mm) for smoothness.
- Re-compact and water lightly to settle any loose particles.
Step 4: Laying the Artificial Grass
Once your base is prepared:
- Roll out the artificial grass.
- Allow it to acclimate to the environment for 24 hours.
- Trim the edges neatly.
- Secure with turf pegs or adhesive, depending on surface type.
- Infill with silica sand if required for added stability and blade support.
Why Choose Artificial Grass Wholesalers?
Artificial Grass Wholesalers is a trusted South African supplier and installer offering one of the country’s widest ranges of artificial grass. From lush residential lawns to durable commercial turf, we stock high-grade artificial turf across various price points without compromising quality.
Our Standout Features
- Free sampling service – choose up to six samples to test before buying.
- Direct-to-customer pricing – lower costs with premium quality.
- Professional installation support – or DIY guidance from our experts.
- Ideal for residential and commercial use – gardens, balconies, schools, offices, and more.
- Durable and UV-resistant products for long-lasting results.
Even our most affordable range outperforms competitor products, offering better quality at a better price.
Frequently Asked Questions (FAQs)
What is the best base for artificial grass?
The best base is compacted crushed stone or crusher dust, topped with a thin layer of coarse sand for levelling. This combination offers stability, drainage, and a smooth surface.
Can I lay artificial grass on soil?
You can, but it requires proper preparation. Remove the topsoil, compact the area, install a weed membrane, and lay a stable sub-base before adding your artificial grass.
Do I need to put sand under artificial grass?
A layer of compacted coarse sand can be used on top of crushed stone to create a smooth finish. Some installations also require infill sand to keep grass blades upright.
Is weed barrier fabric necessary?
Yes. A weed membrane prevents unwanted vegetation from growing through your artificial grass, especially in outdoor garden areas.
Can I install artificial grass myself?
Yes, many homeowners choose to DIY. However, it’s often best to get professional installation for larger or more technical spaces to ensure a seamless result.
Contact Artificial Grass Wholesalers for Details
Installing artificial grass isn’t just about choosing the right turf; it’s about what’s underneath it. Properly preparing your surface and using reliable sub-base materials like crusher dust, decomposed granite, or sand-gravel combos ensures your investment looks better, lasts longer, and performs optimally.
For expert advice, high-quality turf options, and a free sampling service, trust Artificial Grass Wholesalers to supply and support your next artificial grass project.
Contact a representative from Artificial Grass Wholesalers today to learn more, or continue to browse our site to find your perfect grass solution.
