Choosing the right sand for artificial grass can make a big difference to how the lawn looks, feels, and drains once it is installed. It is one of those details that often gets overlooked, yet the final screed layer plays a huge part in creating a smooth finish and helping the base perform properly over time. Use the wrong material, rush the levelling, or rely on too much loose sand without a proper base underneath, and even good-quality grass can end up looking uneven. If you are planning a self-install or simply want to understand how the groundwork should be done properly, it helps to know what each option actually does.
🏖️ Quick Answer: What sand should you use for artificial grass?
- Sharp sand is usually the most practical choice for many domestic installs
- Grano dust creates a very firm finish but is harder to screed neatly
- 2–6mm limestone fines are easy to work with and excellent for drainage
- The best choice depends on your garden, drainage needs, budget, and who is doing the install
- The sand layer should sit on top of a proper compacted sub-base, not replace it
Need Help Choosing the Right Base for Your Artificial Grass?
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🔑 Quick Takeaways
- Sharp sand is the usual go-to for value, compaction, and ease of use.
- Grano dust gives an extremely solid finish but takes more skill to level properly.
- Limestone fines are drainage-friendly and easy enough to work with, but they do not lock up quite like sharp sand or grano.
- The screed layer matters, but it still needs a proper Type 1 MOT base underneath.
🧭 Jump to:
| 🏗️ Why the right sand matters | ⚖️ Sharp sand vs grano vs limestone fines |
| 💧 Best for drainage | How much sand do you need? |
| ⚠️ Common mistakes | ❓ FAQs |
💡 Quick Answer: For most garden artificial grass installs, sharp sand is often the most practical final screed layer because it compacts tightly, drains well, is easier to work with, and is more cost-effective than grano dust or limestone fines. That said, grano and limestone fines can both be good options depending on the finish and site conditions.
Why the Right Sand Matters Under Artificial Grass
The final sand or fines layer sits just below the grass and helps create the smooth finish you actually see and feel. This is the part of the groundwork where dips are corrected, levels are refined, and the surface is prepared for fitting.
Get this stage right and the lawn feels solid, drains well, and looks clean and natural.
Get it wrong and you can end up with:
- Visible dips and bumps
- Poor drainage
- Movement underfoot
- A lawn that looks untidy after a short time
That is why sand choice is not really just about sand. It is about finish, drainage, stability, and how well the installation holds up over time. It also links directly back to proper ground preparation, which we covered in our guide on how to prepare ground for artificial grass.
Do You Always Need Sand Under Artificial Grass?
Not in the way some people think.
For a standard garden installation, the final sand or fines layer is usually there as a thin screed layer above the main compacted base. It is not supposed to do the whole job on its own.
A proper build-up usually includes:
- Excavated ground
- Geotextile membrane
- Type 1 MOT sub-base
- Final screed layer using sand or fines
- Then the artificial grass
So yes, a sand-based levelling layer is commonly used – but it should sit on top of a proper structural base. If you are wondering more broadly what belongs underneath the lawn, our what to put under artificial grass guide is worth reading too.
Sharp Sand vs Grano Dust vs Limestone Fines
The three most common options people compare are sharp sand, grano dust, and 2–6mm limestone fines. Each has strengths and trade-offs.
A) Sharp Sand
Sharp sand is often the most practical choice for domestic installs because it gives a good balance of performance, usability, and price.
Benefits:
- Compacts tightly
- Drains well
- Easier to work with than some alternatives
- Usually more cost-effective
For many homeowners and self-installers, it is the easiest material to get on with while still producing a good result when the rest of the base is built properly.
B) Grano Dust
Grano dust is a firmer, more premium-feeling option once compacted. It can create an extremely solid finish, which some installers really like.
Benefits:
- Very firm once compacted
- Good drainage
- Excellent long-term stability
Trade-offs:
- Harder to get a perfect final screed
- Usually more expensive than sharp sand
In other words, grano can be excellent in the right hands – but it is not always the friendliest option for someone doing their first self-install.
C) 2–6mm Limestone Fines
Limestone fines are often liked because they are workable and very good for drainage. They do compact, but they do not lock up quite the same way as sharp sand or grano.
Benefits:
- Excellent for drainage
- Easy to work with
- Still creates a solid base
Trade-offs:
- Does not bind quite as tightly as sharp sand or grano
- Can also be more expensive depending on the job
| Material | Main Strength | Main Drawback | Best For |
|---|---|---|---|
| Sharp Sand | Value, drainage, ease of use | Not as rock-hard as grano | Most domestic installs |
| Grano Dust | Very firm finish | Harder to screed, pricier | Premium, very solid base builds |
| Limestone Fines | Drainage and workability | Does not lock up quite as tightly | Drainage-focused installs |
Which Sand Is Best for Drainage Under Artificial Grass?
If drainage is the main concern, all three can work well when used properly above a solid sub-base. That said, limestone fines are often praised for drainage performance, while sharp sand also handles water well and remains the more rounded all-rounder for many domestic gardens.
The bigger point is this: drainage problems are not usually solved by sand choice alone.
Poor drainage is more often caused by:
- Shallow excavation
- A weak or badly compacted sub-base
- Poor levels or falls
- Trying to install over already boggy ground without adjusting the build-up
That is especially relevant for dog owners and households dealing with mud-prone lawns. If that is the use case, this topic ties in well with our dog-friendly artificial grass page, because pet gardens need a base that stays stable and drains properly all year round.
What Is Usually Best for Most Domestic Gardens?
For most back gardens, sharp sand is usually the safest recommendation.
Why?
- It is easier to source
- It is more budget-friendly
- It is easier to rake and level
- It compacts tightly enough for a strong finish when used correctly
That is why it tends to suit the average homeowner, self-installer, or anyone wanting a sensible balance between finish, performance, and cost.
If a customer is in an area with heavier rainfall, clay ground, or generally awkward garden conditions, we would rather assess the full base build than pretend there is one magic material that fixes everything. That is where local conditions matter, especially in places like Bury, Greater Manchester, and surrounding areas where drainage can be a major part of the job.
🛠️ Expert Insight: The final screed layer is important, but it only works properly when the main base underneath has been excavated, compacted, and levelled correctly. A brilliant sand choice cannot rescue bad groundwork.
How Much Sand Do You Put Under Artificial Grass?
For a typical garden install, the final screed layer is usually around 10mm thick. The goal is not to build the whole base out of sand. The goal is to create a neat, smooth, final levelling layer above the compacted Type 1 MOT.
Once it is spread evenly:
- Compact it
- Check the levels again
- Do a final screed
- Fill any dips before laying the grass
This stage has a huge effect on the finished look of the lawn, which is why rushing it nearly always shows later.
Can You Use Building Sand or Soft Sand Under Artificial Grass?
Generally, no – not if you want the best finish.
Building sand is usually too soft and less suitable for creating a stable, drainage-friendly screed layer under artificial grass. Sharp sand is the better option because the grain structure helps it compact more effectively and perform better under the surface.
If someone just says “sand”, that is often where confusion starts. The type of sand matters.
Common Mistakes When Using Sand Under Artificial Grass
The most common mistakes include:
- Using too much sand and not enough proper sub-base
- Choosing the wrong sand type
- Not compacting the layer properly
- Rushing the final screed
- Trying to correct major base issues with the sand layer alone
That last one is particularly common. A thin levelling layer is there to refine the finish, not to hide poor excavation or a weak base.
If you are still deciding how the whole build-up should work, our artificial grass installation page explains how we approach the full job properly rather than treating the screed layer as an afterthought.
Does Every Artificial Grass Lawn Need Sand Infill on Top?
No. For most domestic lawns, the conversation here is about the base preparation underneath, not messy sand infill on top of the grass pile.
That is one reason AGAG’s domestic offering is appealing in the first place. For most homes, people want a realistic, low-maintenance lawn without turning the garden into a sand-filled sports surface.
Sports and specialist surfaces are a different conversation, but for most residential installs, the key issue is the base and screed beneath the grass.
FAQs About Sand for Artificial Grass
Before choosing a base material, these are the questions most people ask. The answers below clear up the usual confusion around sharp sand, building sand, drainage, layer thickness, and whether sand alone is enough.
What sand is best for artificial grass?
For many domestic installs, sharp sand is usually the best all-round choice because it compacts well, drains well, is easier to work with, and is more cost-effective than grano dust or limestone fines.
Can I use building sand under artificial grass?
It is not usually the best option. Sharp sand is preferred because it creates a firmer, more reliable screed layer and performs better under the grass.
Is sharp sand better than grano dust for artificial grass?
For many homeowners, yes, because it is easier to work with and more affordable. Grano dust can create a very firm finish, but it is harder to level neatly and usually costs more.
Are limestone fines good under artificial grass?
Yes, they can be. They are especially good for drainage and easy to work with, though they do not lock up quite as tightly as sharp sand or grano dust.
How thick should the sand layer be under artificial grass?
A final screed layer is often around 10mm thick above the compacted sub-base. It is there to refine the finish rather than replace the main structural base.
Can I use sand only under artificial grass?
Usually, no – not for the best long-term result. Sand alone is not normally enough for a strong, stable installation. A proper compacted sub-base underneath is still important.
Want the Base Done Properly?
From excavation and sub-base prep to the final screed and finish, we install artificial grass properly from the ground up. If you want help choosing the right materials for your garden, speak to our team today.
Get Expert Advice on the Right Sand for Artificial Grass
The best sand for artificial grass depends on the type of install, the condition of the site, and what you are trying to achieve with the finish. For many domestic lawns, sharp sand is the sensible all-round option. Grano dust and limestone fines can also work well in the right setting, but the final choice should always be considered as part of the full base build – not in isolation.
At As Good As Grass, we look at the whole installation properly, from drainage and excavation to edging, sub-base, and the final finish. If you want advice tailored to your garden rather than generic guesswork, get in touch with our team today.
