Can artificial grass be fitted over slabs or flag stones?

.Can artificial grass be laid over slabs?

The simple answer is yes, but not directly. You can install artificial grass over paving slabs, but the slabs need proper preparation first. Done correctly, this method can save you money compared to a full excavation, while still giving you a lawn that looks natural and drains well.

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Why You Shouldn’t Lay Artificial Grass Directly on Slabs

Artificial grass needs a stable, level, and free-draining base. If you lay grass directly on slabs, you’ll face problems like:

Poor drainage and water pooling.

Uneven surfaces showing through.

Reduced lifespan of the grass backing.

That’s why preparation is key.

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Step 1: Check Slab Stability and Level

Before starting, assess the condition of your slabs:

Make sure they are secure and not rocking.

Identify uneven areas that may need levelling.

If slabs are very uneven, you can use a towelled concrete skim or a self-levelling compound to even them out.

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Step 2: Test and Improve Drainage

Drainage is one of the most important factors when laying artificial grass over concrete or slabs. Do a simple test:

Pour water across the area with a hose or bucket.

Watch for puddles or poor run-off.

Fixes for poor drainage include:

Drilling drainage holes in the slabs.

Removing one or two rows of slabs and filling the gap with pea gravel to allow water to escape.

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Step 3: Add a Base Layer

To create a smooth, cushioned and well-draining surface, you’ll need to add a layer on top of the slabs. Popular options include:

Grano dust (whin dust) mixed with 6mm drainage stone and Zeolite: A fine, compactable layer that provides a stable base.

Aquacushion fast drain underlay: Perfect if you want extra softness underfoot, especially for kids’ play areas.

Aquabase system: Recycled cellular drainage grids filled with gravel and Zeolite – excellent for stability and long-term drainage.

There are a few other techniques at our disposable too!

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Step 4: Lay and Secure the Artificial Grass

Once your base is ready:

1. Roll out the artificial grass, ensuring the pile direction is consistent.

2. Trim neatly around edges.

3. Secure the grass using strong adhesive, fixing pins, or hidden edge trims depending on the area.

4. Brush up the fibres with a stiff broom for a natural, upright look.

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The Benefits of Laying Artificial Grass Over Slabs

Cost-effective: Saves money on excavation and disposal.

Eco-friendly option: Reuses your existing hard surface instead of sending it to landfill.

Instant transformation: Turns a cold, grey patio into a lush, green lawn.

Durability: With the right base and drainage, your artificial lawn will last for years.

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FAQs About Laying Artificial Grass Over Slabs

1. How long does artificial grass last on slabs?

With proper preparation and a good-quality grass, you can expect it to last 10–15 years or more.

2. Do I need underlay for artificial grass on concrete or slabs?

Yes, underlay or a base layer is highly recommended. Shockpad, grano dust, or a drainbase system will improve drainage, protect the backing, and make the surface softer underfoot.

3. Will artificial grass drain properly over slabs?

Yes – as long as drainage issues are addressed first. Drilling holes or adding pea gravel channels can prevent water pooling.

4. Can I just glue artificial grass to slabs?

Technically yes, but it’s not recommended. Without a base layer, the grass will be hard underfoot, show slab lines, and drain poorly.

5. Is it cheaper to lay artificial grass over slabs instead of a full dig-out?

Absolutely. Re-using existing slabs avoids excavation and skip hire, making it a budget-friendly option.

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Final Thoughts

So, can artificial grass be laid over slabs? Yes – but only with proper preparation. Ensure the surface is stable, level, and drains well, and then add the right base before installation.

This method is ideal if you want to cover old patios, paving, or concrete without the expense of a full dig-out. The result is a realistic, low-maintenance lawn that looks great all year round.