When it comes to installing artificial turf in Durham, many people focus solely on the grass itself — the colour, length, softness, and price. But beneath the surface lies the most important component of all: the base. Without the right foundation, your artificial lawn simply won’t perform or last the way it should.
So, what is the best base for artificial turf? In this article, we break it down, compare the most common base materials, and explain why choosing the right one is crucial for drainage, stability, and a flawless finish.
Why Is the Base So Important?
Artificial grass may look perfect on top, but what lies underneath will determine:
- How well your lawn drains after rain
- Whether it remains flat or develops lumps over time
- If it can handle foot traffic, pets, and garden furniture
- How long the installation will last
Without a solid, well-draining base, even the highest-quality turf will fail. That’s why professional installers, like Landscapers Durham, place so much emphasis on ground preparation and base construction.
What Makes a Good Base for Artificial Turf?
A suitable base should meet these key criteria:
✅ Stable and compacted – to prevent shifting or sagging
✅ Well-draining – to avoid water pooling
✅ Smooth and level – to support even turf appearance
✅ Durable under pressure – especially in high-traffic areas
Let’s explore the best materials used to build this kind of foundation.
Best Base Materials for Artificial Turf
1. MOT Type 1 Crushed Stone (Hardcore)
Best for: General ground stabilisation and heavy-use areas
Depth required: 50–75mm
MOT Type 1 is a crushed aggregate that includes a mix of stone and dust. It compacts well to create a solid base that resists movement and supports long-term durability. It’s especially useful in driveways, pathways, and high-traffic gardens.
✅ Pros: Very stable, excellent load-bearing capacity
❌ Cons: Needs to be topped with sand or granite dust for smooth levelling
2. Granite Dust or Grano Dust
Best for: Top levelling layer
Depth required: 10–15mm (on top of MOT base)
Granite dust is a fine, angular aggregate that locks together when compacted. It drains better than sand, won’t shift easily, and offers a smoother finish. Many professionals now prefer granite dust over sharp sand for the top layer.
✅ Pros: Stable, drains well, creates a flat surface
❌ Cons: Slightly more expensive than sand
3. Sharp Sand
Best for: Levelling under light-use areas
Depth required: 10–15mm
Sharp sand is a traditional choice for the top layer of an artificial turf base. It’s cheaper and easier to spread than granite dust, but it can shift or wash away over time if not compacted properly.
✅ Pros: Affordable and easy to work with
❌ Cons: Can move under pressure or poor drainage
4. Type 3 Aggregate (Permeable Base)
Best for: Areas with poor natural drainage or SuDS compliance
Depth required: 50–75mm
Type 3 aggregate contains larger stones and allows water to flow through easily. It’s ideal for permeable installations or when building artificial turf over soft or wet ground.
✅ Pros: High drainage capacity, great for eco-conscious projects
❌ Cons: Needs a top layer for smoothness
Layered Base Structure (Recommended Method)
To create the best base for your artificial turf, use a two-layer system:
- Lower Layer – MOT Type 1 (50–75mm):
Compacted for strength and stability - Upper Layer – Granite Dust (10–15mm):
Screeded and compacted for a smooth finish
Top this with a weed membrane between the granite dust and your turf to prevent weed growth while allowing water to pass through.
What Base Should You Avoid?
Some materials are unsuitable for long-term installations:
- Topsoil or garden soil – Retains water, promotes weeds, and shifts easily
- Builder’s sand – Too fine and washes away with rain
- Uncompacted gravel – Lacks stability and won’t support turf evenly
These materials may seem convenient but lead to costly repairs or full reinstallation later.
Can I Lay Artificial Grass on Concrete?
Yes, artificial grass can be laid on concrete, paving, or decking. However, for comfort and drainage:
- Add foam underlay to soften the surface
- Ensure water can run off through gaps or slope
- Use adhesive to secure the turf properly
While not ideal for all applications, this method works well for balconies, patios, and temporary installations.
Final Verdict: What Is the Best Base for Artificial Turf?
The best base for artificial turf is a two-layer system consisting of:
- MOT Type 1 crushed stone for strength and drainage
- Granite dust for a smooth, compact top surface
Combined with a quality weed membrane and correct compaction, this base offers the perfect foundation for a beautiful, long-lasting artificial lawn.
Need Help With Installation?
If you’re unsure about groundwork or want professional results, contact Landscapers Durham. We provide expert artificial turf installation in Durham and surrounding areas — from site preparation to finishing touches.