Artificial grass can be installed over some existing garden surfaces, but only if the surface is stable, drains properly and can support a neat, secure finish. Concrete, paving, decking and compacted bases can often work with the right preparation. Natural grass, loose soil, poor drainage and old artificial grass usually need more work first.
The real question is not simply “can we lay grass over this?” It is whether the existing surface will still perform properly once the artificial grass is fitted on top.
🏡 Quick Answer: Which existing surfaces can artificial grass go over?
- Concrete – often suitable if it is sound and drains properly.
- Decking – possible if the timber is stable and not rotten.
- Paving slabs – usually possible if the slabs are firm and level.
- Gravel – sometimes possible if it is compacted and suitable for a base.
- Natural grass or soil – normally needs excavating and preparing properly.
- Old artificial grass – usually best removed before fitting new turf.
Not Sure If Your Existing Surface Can Be Covered?
We install artificial grass over a wide range of garden surfaces, including concrete, paving, decking and prepared soil bases. Send us a few photos and we can advise what is realistic.
🔑 Quick Takeaways
- Some existing garden surfaces can be covered with artificial grass.
- The surface must be stable, secure and drainage-friendly.
- Natural grass usually needs removing before installation.
- Old artificial grass is usually better lifted rather than covered over.
- Skipping preparation often leads to poor joins, poor drainage and a shorter lifespan.
🧭 Jump to:
| 🏡 Can you install over existing surfaces? | 🌱 Natural grass and soil |
| 🧱 Concrete | 🪵 Decking |
| 🧩 Paving slabs | 🪨 Gravel |
| ♻️ Old artificial grass | ❓ FAQs |
💡 Quick Answer: Artificial grass can be installed over some existing surfaces, including concrete, paving and decking, but only when the surface is stable, level enough, secure and able to drain. Loose, rotten, uneven or poorly draining surfaces normally need correcting first.
Can You Install Artificial Grass Over Existing Surfaces?
Yes, in some cases.
Artificial grass can be installed over certain existing surfaces, but the surface underneath still needs to do its job. It must be solid enough to support the grass, stable enough not to move, and suitable enough to allow water to drain away.
Before saying yes, we usually check:
- Whether the surface is level enough
- Whether it moves, rocks or flexes
- Whether water already pools on it
- Whether the edges can be secured neatly
- Whether the finished height will cause problems
- Whether the existing surface is worth keeping
If the answer to those checks is positive, covering an existing surface can sometimes save time and reduce disruption. If not, proper preparation is still the better route.
Our artificial grass installation service covers everything from surface assessment and groundwork through to the final fitting.
Can Artificial Grass Be Installed Over Natural Grass or Soil?
Not directly.
Natural grass and loose soil normally need excavating before artificial grass is installed. If turf is simply rolled over the top, the surface is likely to move, rot, smell, drain poorly and become uneven.
For a proper installation, the existing lawn is usually removed and replaced with a stable base.
This usually includes:
- Removing the natural grass
- Excavating to the correct depth
- Installing a membrane
- Building a compacted sub-base
- Adding a final screed layer
- Laying and securing the artificial grass
For more detail, see our guides on how to lay artificial grass on soil and how to prepare ground for artificial grass.
Can Artificial Grass Be Installed Over Concrete?
Yes, artificial grass can often be installed over concrete if the concrete is sound.
The main things to check are drainage, surface condition and comfort underfoot. Concrete does not drain in the same way as a prepared aggregate base, so water needs somewhere to go.
Concrete may be suitable if:
- It is stable and not badly cracked
- It does not hold standing water
- The surface is reasonably smooth
- The finished height will not block thresholds or drains
Depending on the space, an underlay may also be used to improve comfort. Our full guide on how to lay artificial grass on concrete covers this in more detail.
Can Artificial Grass Be Installed Over Decking?
Yes, but only if the decking is in good condition.
Decking can be covered with artificial grass, but rotten, loose or flexing boards will still cause problems underneath. If the deck is moving now, it will keep moving once covered.
Decking should be checked for:
- Rotten timber
- Loose boards
- Movement or bounce
- Drainage between boards
- Safe finished height
If the decking is solid, artificial grass can make the space softer, greener and more comfortable. Our guide on covering decking with artificial grass explains the key risks and benefits.
Can Artificial Grass Be Installed Over Paving Slabs?
Usually, yes, if the paving slabs are stable.
Paving can make a good base if the slabs are firm, level and not rocking. The main issues come from uneven joints, loose slabs, poor falls and water collecting in low spots.
Paving may need extra work if:
- Slabs are loose or rocking
- There are raised joints
- Water pools between slabs
- The surface is very uneven
- The edges are difficult to secure
If the paving is uneven, our guide on laying artificial grass on uneven ground may also help.
Can Artificial Grass Be Installed Over Gravel?
Sometimes.
Loose gravel is not usually a suitable finished base because it moves underfoot. However, compacted gravel or a properly prepared stone base can sometimes be worked with, depending on its depth, stability and drainage.
Gravel is more likely to work if:
- It is compacted firmly
- It does not shift underfoot
- It drains well
- A suitable final levelling layer can be added
If the gravel is loose, shallow or uneven, it may need removing or reworking before installation.
Can New Artificial Grass Be Installed Over Old Artificial Grass?
Usually, we would not recommend it.
Old artificial grass can hide a lot of problems, including failed joins, trapped odours, poor drainage, moss, weeds, compacted debris and base movement. Laying new turf directly over old turf can trap those issues underneath.
Old artificial grass is usually best removed if:
- It smells
- It is holding water
- It has failed joins or lifting edges
- It is full of moss, weeds or debris
- The base underneath needs checking
If the existing lawn is simply tired rather than failed, it may be worth reading our guide on whether old artificial grass can be restored before deciding to replace it.
| Existing Surface | Usually Suitable? | Important Notes |
|---|---|---|
| Natural grass | No, not directly | Usually needs removing and replacing with a proper base |
| Soil | No, not directly | Needs excavation, membrane and compacted sub-base |
| Concrete | Often | Must be stable and drain properly |
| Decking | Sometimes | Only if timber is solid, secure and not rotten |
| Paving slabs | Usually | Slabs must not rock, lift or hold water |
| Gravel | Sometimes | Must be compacted and suitable for a final levelling layer |
| Old artificial grass | Rarely recommended | Usually best lifted so the base can be checked |
What We Check Before Installing Over an Existing Surface
Before deciding whether an existing surface can stay, we look at how the whole area behaves.
The main checks include:
- Stability – does the surface move, flex or rock?
- Drainage – does water run away or sit in low spots?
- Levels – will the finished lawn look smooth?
- Edges – can the grass be secured neatly?
- Access – can materials and tools reach the area safely?
- Finished height – will doors, drains or thresholds be affected?
If you are not sure what information to send us, our guide on what information we need to quote artificial grass installation explains exactly what helps.
🛠️ Expert Insight: The surface itself is rarely the only issue. Problems usually come from skipping preparation, ignoring drainage or assuming the grass will hide what is underneath. If the base is unstable, the finished lawn will eventually show it.
FAQs About Installing Artificial Grass Over Existing Surfaces
If you already have concrete, decking, paving, gravel, soil or old artificial grass in place, these are the questions homeowners usually ask before deciding what needs to be removed.
Can artificial grass be laid over paving slabs?
Yes, if the paving slabs are stable, secure and drain properly. Loose, rocking or uneven slabs usually need correcting first.
Can artificial grass be laid over gravel?
Sometimes. Loose gravel is not usually suitable, but compacted gravel or a prepared stone base may work if it is stable and can be levelled properly.
Can artificial grass be laid over decking?
Yes, if the decking is solid, secure and not rotten. If the boards move or flex, the grass may not sit properly.
Can artificial grass be laid over old artificial grass?
Usually, this is not recommended. Old artificial grass is normally best removed so the base, drainage and edges can be checked properly.
Can artificial grass be laid over soil?
Not directly. Soil usually needs excavating and replacing with a proper sub-base before the artificial grass is installed.
Which existing surface is easiest to cover?
Stable, clean concrete is often one of the easiest surfaces to cover, provided drainage and finished height are suitable.
Do I need to remove my old lawn first?
Yes, natural grass is usually removed before artificial grass is installed. Laying directly over grass can lead to movement, odours, poor drainage and an uneven finish.
Want to Know If Your Existing Surface Can Be Covered?
Send us a few photos of your garden and we can advise whether your concrete, paving, decking, gravel, soil or old artificial grass needs removing, repairing or preparing before installation.
Get Expert Advice Before Covering an Existing Garden Surface
Artificial grass can be installed over several existing surfaces, but the preparation matters. A stable base, good drainage and secure edges are what make the finished lawn last.
At As Good As Grass, we install artificial grass over a wide range of garden surfaces and will always advise whether covering, correcting or removing the existing surface is the best option. Take a look at our artificial grass installation service or contact our team for straightforward advice.
