Laying artificial grass on gravel: the UK DIY guide

Yes, you can lay artificial grass on gravel — but only when three conditions are met: the existing gravel is stable and compacted, the particles are angular rather than rounded, and you add a thin levelling layer before the turf goes down. Get all three right and you can skip a full excavation. Miss any one of them and you will be pulling the turf back up within a season.

Before you read further, run these three quick checks on your existing surface:

Stability test: Walk across the gravel firmly. If it shifts, sinks, or crunches more than a few millimetres underfoot, it is not a reliable base and will need reworking or replacing.
Drainage check: Run a hose over the area for two minutes. Water should disperse within 30 seconds. Pooling means the base is either compacted too tightly with fines, or the slope is wrong (aim for a 1–2% fall away from structures).
Shape check: Pick up a handful of stones. Angular, irregular fragments with sharp edges will lock together under load. Smooth, rounded pea gravel will not — and that distinction matters more than depth alone.

The materials that make this work are MOT Type 1 crushed stone as the structural base, limestone screenings as the levelling layer, geotextile fabric for separation, and a supplier like Poweraggregates who can advise on quantities and deliver the right grades to your door.

Key takeaways

Laying artificial grass on gravel works when the base is angular, compacted to an appropriate residential depth, topped with a thin levelling screed, and protected by geotextile fabric — skip any of these and the surface will fail.

Point	Details
Keep gravel only if stable	Walk-test the surface; if it shifts underfoot, rework or replace before laying turf.
Angular stone is non-negotiable	Rounded pea gravel does not compact or interlock — use MOT Type 1 as the structural base.
Always add a levelling screed	A 12–25 mm layer of limestone screenings over compacted stone prevents rippling.
Compact in 50 mm lifts	Never add more than 50 mm of loose aggregate before running the plate compactor.
Poweraggregates for materials	Supplies MOT Type 1, limestone screenings, geotextile fabric, and artificial grass with delivery and quantity advice.

Can you keep your existing gravel, or does it need to go?
What layers go under the turf?
Tools, quantities, and a simple cost example
Step-by-step: how to install artificial grass over a gravel base
Drainage and maintenance: what to expect long-term
Common problems and how to fix them
What to buy from Poweraggregates for this project
Poweraggregates has everything you need for this project
Sources
FAQ

Can you keep your existing gravel, or does it need to go?

The honest answer is: it depends on what is already there. UK installers confirm that existing gravel can be reworked and reused only when it is compacted, clean, and stable. If it moves when walked on, treat it as loose fill.

How to assess depth and compaction

Push a screwdriver or metal spike vertically into the gravel with moderate hand pressure. If it sinks more than 50 mm without resistance, the base is too loose. You are looking for firm refusal within the top 50 mm. Also check total depth: a residential lawn needs a compacted aggregate base beneath the turf system. If the existing gravel is shallower than that, you will need to top it up with fresh angular stone.

Angular vs rounded: why it matters so much

Angular crushed stone — the kind that looks jagged and irregular — locks together under compaction and creates a load-bearing matrix. Rounded pea gravel does the opposite: it rolls under pressure, gives poor compaction strength, and causes the turf surface to ripple and migrate at the edges. Rounded pea gravel is unsuitable as a primary structural base for exactly this reason. If your existing gravel is pea gravel, you have two options: remove it entirely, or contain it as a lower drainage layer and lay a full angular stone sub-base on top.

The drainage test

Slope matters as much as permeability. A spirit level and a 2-metre straight edge will confirm this in under a minute. If the area is flat or falls towards a wall, address the gradient before you do anything else.

When removal is the only option

Gravel that is organic-contaminated (mixed with soil, roots, or decomposed matter)
Gravel shallower than 50 mm with no firm substrate beneath
Rounded pea gravel with no angular material present
Any surface with visible standing water after light rain

Pro Tip: Push a bamboo cane into the gravel at five points across the area and mark the depth it reaches before hitting resistance. Average those five readings. That number tells you whether you are topping up or starting over.

What layers go under the turf?

A well-built artificial turf base is a system, not just a pile of stone. Each layer has a specific job, and skipping one creates a problem that shows up later. A compacted angular stone base with a thin fine levelling layer is the correct foundation — sand or organic fills alone are not reliable long-term bases.

Here is what the full layer stack looks like, from bottom to top:

Geotextile separation fabric: Laid directly on the existing ground or gravel before any new aggregate goes down. It stops fine soil migrating up into the stone base, which would eventually block drainage and cause the surface to soften.
MOT Type 1 angular crushed stone (structural base): The load-bearing layer. For a standard residential lawn, compact this to 50–75 mm. For heavier-use areas such as pet runs or children’s play zones, increase the depth and compact in moderate lifts.
Limestone screenings or decomposed granite (levelling layer): A thin layer of 12–25 mm, raked and lightly compacted, that fills the voids in the angular stone and creates a smooth, flat surface for the turf to lie on. This is the layer that prevents rippling.
Weed membrane: Where weeds have previously been active beneath the gravel, apply a weed membrane and clear any organic debris before installation. The membrane sits above the screenings and below the turf.
Shockpad or underlay (optional): Adds cushioning for play areas and improves the feel underfoot. Not structurally necessary on a well-prepared base, but worth considering for children’s gardens.
Edge restraints: Treated timber baulks, aluminium edging, or concrete haunching around the perimeter. Without them, the base migrates outward under load and the turf edges lift.

Rounded pea gravel has no place in the structural layers. If it is already present and cannot be removed, it may remain as a contained lower drainage layer only, with a full MOT Type 1 base built above it and a geotextile layer separating the two.

Tools, quantities, and a simple cost example

Tools checklist

You will need: a plate compactor (hire one — do not try to hand-tamp a base), a wacker plate for tight edges, a turf knife or carpet knife with spare blades, jointing tape and adhesive, landscape nails or galvanised staples, a straight edge, a spirit level, a stiff broom or power broom for infill, and a rake for spreading screenings. Compactor hire and finishing tools are essential — budget for them from the start.

Calculating material volumes

Convert your area to square metres, decide on your compacted depth in metres, and multiply the two to get cubic metres. Crushed stone typically weighs around 1.5–1.7 tonnes per cubic metre, so multiply your m³ figure by 1.6 as a working estimate for tonnes. For screenings, a 25 mm layer over 20 m² needs a moderate volume of material, approximately half a cubic metre.

Worked example for a 20 m² lawn:

For a 20 m² garden, budget a full day for base preparation and a second day for laying and finishing the turf. Plate compactor hire typically runs £60–£90 per day in the UK. Turf itself ranges from around £15–£20 per square metre for mid-range options.

Step-by-step: how to install artificial grass over a gravel base

Step 1 — Clear and assess. Remove all furniture, edging, and debris. Carry out the stability, drainage, and shape checks described above. Mark any areas that need reworking.

Step 2 — Rework or top up the base. If the existing gravel is angular and compacted, rake it level and proceed. If it is loose or rounded, either remove it or add a layer of MOT Type 1 on top, working in lifts of no more than 50 mm at a time. Never add more than 50 mm of loose material before compacting.

Step 3 — Compact the structural base. Run the plate compactor across the area in overlapping passes, working in two perpendicular directions. The target is a firm, unyielding surface that does not depress underfoot. Three to four passes in each direction is typical for a residential base.

Step 4 — Lay the geotextile fabric. Roll it out across the compacted base with a 150–200 mm overlap at joins. Secure the edges with landscape pins. This layer is what keeps the screenings from migrating down into the stone over time.

Step 5 — Spread and compact the levelling layer. Rake limestone screenings to a depth of 12–25 mm across the fabric. Use a straight edge and spirit level to achieve a flat, consistent surface. Lightly compact with the wacker plate — one or two passes only, as over-compaction will crack the screenings into dust.

Step 6 — Lay the weed membrane (if required). Roll it out over the screenings, overlapping joins by at least 100 mm. Trim to the edges.

Step 7 — Roll out the turf. Lay the turf on the prepared surface and allow it to acclimatise for at least two hours before cutting, especially in warm weather. All pile should run in the same direction — check this before cutting.

Step 8 — Cut and join. Use a sharp turf knife against a straight edge. For joins, butt the edges tightly, apply jointing tape beneath the seam, and bond with adhesive. Allow the adhesive manufacturer’s specified curing time before walking on the join — typically 30–60 minutes.

Step 9 — Secure the perimeter. Fix landscape nails or galvanised staples every 150–200 mm around the full perimeter and along any joins. Fold the turf edge under the edging board or tuck it beneath the restraint.

Step 10 — Apply infill and brush. Spread kiln-dried sand or rubber crumb infill evenly across the turf. Brush against the pile direction with a stiff broom to stand the fibres upright.

Pro Tip: When joining two rolls, offset the seam by at least 50 mm from any edge restraint and run it parallel to the main viewing angle from the house. A seam running away from you is almost invisible; one running across your sightline is not.

Avoid installation on wet days — a damp base will not compact properly, and adhesive will not cure reliably below 5°C.

Drainage and maintenance: what to expect long-term

A well-built angular stone base drains vertically and efficiently. Good drainage and secure fixing are the two variables that determine whether artificial turf on stone performs well over time. The risk is not the stone itself — it is fine particles migrating downward from the surface and gradually blocking the voids in the base. Geotextile fabric is what prevents this.

Routine maintenance tasks:

Brush the turf against the pile direction every 4–6 weeks to keep fibres upright and prevent matting.
Clear leaves, moss, and debris promptly — organic matter sitting on the surface will eventually break down and feed weed seeds in the infill.
Top up kiln-dried sand infill annually or when the pile starts to flatten noticeably.
Check perimeter edges each spring for lifting or movement, and re-pin where needed.
For pet owners: rinse the surface weekly with clean water and use an enzyme-based cleaner monthly to control odour.

On heat retention: artificial turf does absorb and radiate heat on sunny days, noticeably more than natural grass. Planting shrubs or installing a garden parasol nearby reduces surface temperature significantly. A light spray of water cools the surface within minutes if needed.

Common problems and how to fix them

Rippling or uneven surface. Almost always caused by insufficient compaction or an uneven levelling layer. For a small area, lift the turf, re-rake and re-compact the screenings, then relay. For a large area with widespread rippling, the base likely needs full reworking.

Pooling water. Either the drainage gradient is wrong, or fines have migrated into the base and blocked the voids. Check the slope first. If the gradient is correct, the base may need breaking up and relaying with fresh aggregate and a new geotextile layer.

Edge collapse or lifting. Missing or inadequate edge restraints. Fix by installing treated timber edging, haunching with concrete, or using proprietary aluminium edging, then re-pin the turf perimeter.

Weed growth through the turf. Usually means the weed membrane has failed, or seeds have germinated in the infill layer. Spot-treat with a diluted weedkiller safe for synthetic surfaces, then check the membrane at the nearest edge. If the membrane is torn or absent, the only lasting fix is to lift the turf and install a new one.

When to call a professional: structural settlement across a large area, repeated pooling after two remediation attempts, or any base movement that suggests an underlying drainage problem beyond the turf system itself.

Seasonal check: every autumn, walk the full perimeter and press down on the surface at 1-metre intervals. Any soft spots indicate base movement and are far cheaper to fix before winter than after.

What to buy from Poweraggregates for this project

Poweraggregates supplies the core materials this job needs, directly from its own quarries, with delivery across the UK and Ireland. For a standard artificial turf installation over gravel, the shopping list is straightforward:

MOT Type 1 angular crushed stone for the structural base layer
Limestone screenings for the thin levelling layer above the stone
Geotextile separation fabric to prevent fines migration
Drainage stone where additional sub-base drainage is needed
Artificial grass and infill materials available through the artificial grass range

Poweraggregates’ product pages and advice confirm the company can advise on quantities and delivery for turf projects — useful when you are working out whether to order bulk bags or a loose load.

Ordering tips:

Round up your calculated quantities by 10% to account for wastage and uneven compaction.
Bulk bags (typically 850 kg) suit most residential jobs and are easier to manage on a standard driveway. Loose loads are more economical for areas above 30 m².
Confirm vehicle access before booking delivery — an articulated lorry needs a clear run of at least 10 metres.
Schedule compactor hire to arrive the day after aggregate delivery so the stone has time to settle before you compact.

Pro Tip: Call Poweraggregates before you order and give them your area in square metres and your target compacted depth. They will calculate the tonnage for you and flag if your access or delivery window needs adjusting.

A note from Constantin at Poweraggregates

The most common mistake I see on DIY turf installations is skipping the levelling layer. Homeowners compact the MOT Type 1 base well, then add a levelling layer before laying turf to prevent rippling. Angular stone is excellent for load-bearing and drainage, but its surface is too coarse for turf to lie flat without a thin screed of limestone screenings on top. That one extra step — and it takes less than an hour on a typical garden — is the difference between a surface that looks professional for years and one that needs pulling up before the first winter is out. If you are unsure about quantities or which grade of screenings to order, get in touch before you buy. It costs nothing to ask, and it saves a second delivery.

Poweraggregates has everything you need for this project

Sourcing the right aggregates in the right quantities is where most DIY turf projects go wrong before a single stone is laid. Poweraggregates supplies MOT Type 1, limestone screenings, geotextile fabric, drainage stone, and artificial grass directly from its own quarries, with nationwide delivery and expert advice on quantities included.

The difference here is direct supply: no middleman markup, no guessing at grades, and a team that has handled everything from small back-garden installs to large commercial projects. You get the right material, in the right quantity, delivered when the compactor arrives.

Browse the full range of aggregates and landscaping materials, or contact Poweraggregates directly for a quantity calculation and delivery quote tailored to your project.

Sources

FAQ

Can you put artificial grass on top of gravel?

Yes, provided the gravel is angular, compacted, and at least 50–75 mm deep. Add a thin levelling layer of limestone screenings and a geotextile fabric before laying the turf.

What is best to put under artificial grass?

A compacted layer of MOT Type 1 angular crushed stone, topped with 12–25 mm of limestone screenings, is the most reliable base. A geotextile separation fabric between the ground and the stone prevents fines migration and protects drainage long-term.

What stones go under artificial grass?

Angular crushed stone such as MOT Type 1 is the standard choice for the structural base. Limestone screenings or decomposed granite work well as the thin levelling layer on top. Rounded stones such as pea gravel are unsuitable as a primary base because they do not interlock under compaction.

What happens if you just lay artificial grass on soil?

Soil compresses unevenly, retains moisture, and allows weeds to grow through the turf. Without a compacted aggregate base, the surface will ripple, sink in patches, and drain poorly. Always install a proper stone sub-base before laying turf.

Does artificial grass on gravel need a weed membrane?

A weed membrane is strongly recommended, particularly where weeds have previously been active beneath the gravel. It sits above the levelling layer and below the turf, and prevents seeds in the infill from establishing roots in the base material.