Key Takeaways
- I lay angular crushed gravel in the 10–14mm range on nearly every path. The sharp edges knock together and lock underfoot. Rounded pea shingle rolls, migrates and doesn’t firm up as well, but is more comfortable underfoot – I just make sure I have solid edging.
- The gravel is only the wearing surface. The strength of a path comes from roughly 10cm of compacted MOT Type 1 underneath, with just 3–5cm of decorative stone on top.
- Never lay loose gravel deeper than about twice the stone size, so around 4cm for a 20mm gravel. Any more and you are wading through it rather than walking on it.
- Always use a geotextile membrane under a gravel path as a separator to stop the stone and the soil mixing. It doesn’t stop weeds as seeds still land and root into the surface above it.
- Edging goes in before the gravel, and so do any plants or stepping stones. Once soil gets into clean decorative gravel, you never get it all out.
The gravel path I get called out to fix is nearly always the same one. Pea shingle, tipped 8cm deep straight onto bare soil, no base, no edge, laid over a bank holiday two or three summers back. By the time I see it, the middle walks like a beach, the lawn has stone all over it, and mud is coming up through the gravel in every dip. The client assumes gravel just ends up like that.
It doesn’t. Built in layers on a compacted base with a proper edge, a gravel path is one of the most reliable and forgiving surfaces you can put into a garden, and a straightforward run is well within a weekend’s DIY. What follows is my method: which stone to buy, what goes underneath it, and the handful of decisions that separate a path that firms up with use from one that causes you endless upkeep.
Which Gravel Is Best for a Path?
The best gravel for a garden path is an angular, crushed stone, because the sharp edges interlock under foot traffic instead of rolling apart. You can use anything from between 6mm and 20mm, with the larger sizes being harder wearing but also less comfortable to walk on. Crushed gravels are the only loose choice that holds well on even a gentle slope.
Rounded pea shingle is the one everyone pictures, and it has a genuine case: it is noticeably softer and more forgiving underfoot, which matters if you’ll be wandering out in bare feet. The trade-off is everything else. It rolls, it migrates into the lawn, it is smooth and slippery on any slope, and the relatively soft stone powders in dry weather, so the white dust walks into the house as footprints. I still use it, but only on flat, low-traffic, decorative runs, and I tell clients before we order.
The third option is self-binding gravel: a stone that comes with its own fines, which lock the surface near-solid when compacted, without cement or resin. It is the choice for prams, wheelchairs and bikes, and for that neat parkland look. If a firm surface is the priority, compare the grades on our self-binding gravel range comparison before deciding, and note it is a different laying method to loose gravel.
| Gravel type | Feel underfoot | Stays put? | Best for |
|---|---|---|---|
| Angular crushed, 6–14mm | Firm, crunchy | Yes, edges lock with use | Main paths, wheelbarrow routes, gentle slopes |
| Rounded pea shingle, 6–20mm | Soft, forgiving | No, rolls and migrates | Flat decorative paths, barefoot comfort |
| Self-binding gravel, 8–10mm to dust | Near-solid once compacted | Yes, binds firm | Prams, wheelchairs, long formal runs |
On colour, check for images of the stone wet as well as dry, because British gravel spends half the year wet and most stones darken by a shade or two. Light gravel lifts a shaded route and reads well at dusk; bright white against planting can look stark, so grey or cream is the safer pale choice. Slate is the other option people ask about, and it behaves differently enough to need its own guide: flat plates rather than angular fragments, superb underfoot at 20mm, and genuinely slippery when wet. I have covered the sizes, the base and the slope limit in building a slate chippings path. Our types of gravel guide also walks through the main stones and where each belongs.
What Do You Put Under a Gravel Path?
Under a gravel path goes roughly 10cm of compacted MOT Type 1 sub-base, and that layer is doing nearly all of the work. It is the part nobody ever looks at and the part everyone feels. Thing is, if you get it wrong, no amount of gravel on top will save the path, as it is only the wearing surface. On a heavier build over coarse hardcore I put 10 to 15cm of raw ballast in between, purely to stop the big stuff underneath migrating up through the gravel.
We stock it as MOT Type 1, which is a crushed aggregate graded from 40mm down to dust, and the mix of lumps and fines is the point: it compacts into a tight, load-spreading bed that the gravel sits on rather than sinks into.
Now the membrane, because the marketing needs correcting. A membrane’s real job under a path is separation: it stops the sub-base punching down into the soil and the soil squeezing up into your clean stone, and it gives a useful check on rhizomatous thugs like couch grass. What it will never do is stop weeds seeding into the path from above. Seeds blow in, land in the surface gravel, and grow in the debris that collects there, membrane or no membrane. Lay one, but lay it for the right reason. Use a proper heavy-duty membrane, not the thin fabric sold for mulched beds, which is a different product entirely. Our guide to what to put under gravel works through the choice in full.
Materials and Tools
Laying a gravel path needs four materials and about eight tools, most of which you probably own. The only thing worth hiring is a plate compactor.
| Material | What it does |
|---|---|
| Gravel, 6–14mm angular | The wearing surface, laid 3–5cm deep. Up to 20mm is fine, and suits heavier-use paths. |
| MOT Type 1 | The sub-base, 10cm compacted. This layer does nearly all the structural work. |
| Heavy-duty membrane and pegs | Separator between soil and sub-base. Overlap sheets 10cm, pin every 45cm. |
| Edging: timber boards, metal strip, bricks or setts | Retains the gravel and traps the membrane edges. Goes in before any stone. |
| Sharp sand (optional) | A 2.5cm blinding over the membrane where the gravel is sharply angular, to stop punctures. |
| Tool | What it does |
|---|---|
| String and pegs, or a garden hose | Marking out. String for straight runs, hose for curves you can walk before digging. |
| Square-edged spade and shovel | Stripping turf and excavating to a flat, firm bottom. |
| Wheelbarrow | Spoil out, aggregate in. The bulk of the day’s work. |
| Landscape rake | Levelling the sub-base, feathering out the crown, and spreading the gravel evenly. |
| Tape measure and spirit level | Checking width, depth and the fall away from the house. |
| Straightedge or a length of timber | Laid across the path to check the crown. It should rock very slightly on the centre. |
| Plate compactor | Compacting the sub-base hard, in two lifts on anything deep. Worth hiring for the day. |
| Hand tamper | For short runs, tight corners and up against the edging where the plate cannot reach. Make one by cable-tying an offcut of timber across the head of a sledgehammer: the weight does the work and the timber spreads it. |
| Gloves and solid boots | Aggregate is sharp and heavy, and a dropped length of edging finds toes. |
How to Lay a Gravel Path: Step by Step
1. Mark Out the Route and Check What’s Below
Marking out is done with string and pegs for straight runs, or a garden hose for curves, laid and walked before anything is dug. A main path wants 1.2m width so two people can pass; a secondary path to the shed or compost can drop to about 70cm. Before digging, check the line for buried services with a hireable cable avoidance tool (cheaper than an power outage). A few generous curves beat a path that kinks about, and this is the right moment to change your mind without it costing you.
2. Dig Out to Around 15cm
The excavation for a standard gravel path is around 15cm deep with a flat, firm bottom: 10cm for the compacted base, 3–5cm for the gravel, and a little in hand for settlement. Strip off turf, roots and every scrap of topsoil in the line, because buried organic matter rots and becomes next year’s hollow. Decide where the waste mountain goes before the first spade cut; digging out is the biggest job on the whole build. Where the path meets the house, the finished surface must sit at least 150mm below the damp-proof course. That is Building Regulations, not preference.
3. Fit the Edging First
Edging is not optional with any loose surface, and it goes in before a single stone. It retains the gravel, pins the membrane edges, and draws the line your eye follows. Pressure-treated timber boards (100 x 25mm, held by 300mm pegs screwed on with the peg tops kept below board level) are the classic budget option; metal strip gives the cleanest curve; bricks or setts on a concrete bed make a mowing strip a lawn mower can run straight over. Set the edge to finish slightly proud of the planned gravel level so it actually holds the stone in. The full material comparison is in our garden edging guide.
4. Build, Crown and Compact the Sub-Base
The sub-base is 10cm of MOT Type 1, spread evenly and compacted hard with a plate compactor, finishing about 4cm below the top of your edging. Do it in two lifts on anything deep, and run the compactor over each until nothing moves. Firm compaction here is also part of your weed defence: a dense base gives roots nowhere to go. The full method, from setting the fall to checking the finished level, is in how to lay a sub-base.
Shape the crown into this layer, not into the gravel. A gravel path sheds water from the centre to both sides rather than falling to one edge, because the surface is loose and held on both sides: tip it all one way and the water carries fines with it and feeds one soggy margin. Rake the Type 1 level with your edging, tip a thin ribbon of extra Type 1 down the centre line, then rake it out to each side so it feathers away to nothing. Compact, then lay a straightedge across the path; it should rock very slightly on the centre. That is all a 1:100 crown is, about 6mm of rise on a 1.2m path, a gentle hump you feel rather than a slope you measure. Grade the whole path falling away from the house, never toward it.
5. Lay the Membrane
The membrane goes over the compacted base, run up the sides of the trench, with sheets overlapped by at least 10cm and pinned roughly every 45cm so it cannot creep when the stone goes on. Let the edging trap the outer edges. The reason it sits here rather than at the bottom of the dig comes down to what is actually likely to go wrong. On a driveway, the weight of a car presses the sub-base down into the soil, so the fabric is buried at formation level to keep the two apart. A path never takes that weight, so the base is not going anywhere. What does happen is the gravel working down into the base and the base working up into the gravel, and the fabric belongs between those two. That is why driveway and block paving guides bury it at formation level, and why they are right for that build and wrong for this one.
The exception is ground that cannot hold anything up. On very soft soil, or on heavy clay, it is worth a second sheet at the bottom of the dig as well, so the base has something to sit on. Two layers rather than a relocation. And if your gravel is sharply angular, a 2.5cm blinding of fine washed sand over the fabric stops it being punctured, or simply choose a gravel that includes fines.
6. Add the Gravel, Thinly
The gravel layer is 3–5cm deep, and thin is the whole trick: no loose layer should be much deeper than twice the stone size. Barrow it into piles along the run, rake it level, and stop when the sub-base has just disappeared. While it might feel slightly mean, trust it. A thin layer over a hard base firms up within weeks of walking; a deep layer never does.
Leave the plate compactor in the van for this bit. Clean loose gravel has nothing to bite into and the machine mostly just sprays it about; foot traffic does the job within weeks. The exception is if you laid a sand blinding or chose a gravel with fines, in which case roll or hand tamp the surface and it will tighten from day one.
7. Sort the Doorstep (Optional)
Where a gravel path meets a door, a flagstone or two bedded at the threshold earns its keep for decades, because gravel travels indoors on shoes and a firm entry pad knocks the strays off. Small detail, rarely mentioned, and the difference between a path you love and one you curse.
How Do You Lay a Gravel Path on a Slope?
Loose gravel holds on a gentle slope only if the stone is angular, and beyond about 8% (roughly 1 in 12.5) I stop arguing with gravel altogether. Rounded pea shingle does not belong on a slope at all; it is smooth, mobile and slippery, and every rain moves it downhill. On a modest fall, treated timber battens fixed across the path at intervals work like little dams, holding the stone back in bays. Steeper than that, build shallow timber-contained steps that hold the material in terraces, or change surface entirely. Fighting gravity with a rake is not a maintenance plan.
6 Gravel Path Mistakes I Keep Seeing
- Too much gravel. The runaway-truck gravel traps beside steep roads work precisely because deep loose gravel swallows anything that enters it. Lay 10cm of loose stone and you have built one across your garden. Twice the stone size, no more.
- Pea shingle in the wrong job. Lovely on a flat sunny run in bare feet; a migrating nuisance on slopes, main routes and anywhere a barrow travels.
- Expecting the membrane to kill weeds. It stops layers mixing, nothing more. The weeds you will actually meet arrive from above, so rake and pull the seedlings while they are small.
- Skipping the edging. Every unedged loose path spreads. The lawn gets stony, the path gets thin, and the mower finds the strays at full speed.
- Gravel first, garden second. Set edging, large plants and any stepping stones before the stone is tipped. Once soil gets into clean decorative gravel, it is in there for good.
- Under-ordering. Natural stone varies between quarry loads, so a top-up bag six months later can arrive a visibly different shade. Order the whole job at once, with around 10% spare for settlement and top-ups.
How Do You Maintain a Gravel Path?
A well-built gravel path needs a rake through in spring and autumn, and not much else. Raking re-levels the surface, dislodges weed seedlings while they are small, and retrieves strays from the beds; leaf-fall is the real enemy, because rotting leaves become the compost weeds germinate in, so clear them promptly each autumn. Expect a modest annual top-up as the surface settles and thins in the trafficked line. In snow, skim off the bulk and deliberately leave about 1cm behind, so the shovel takes the snow and not your stone. For green film and grubby pale stone, the method is in cleaning garden stones.
Buying Gravel for a Path
Order by depth, not by eye, and order the whole job in one go. A 12m² path at 4cm in 20mm gravel comes to a single bulk bag once you add 10% for settling. Drop to 10mm at 3cm and 18m² needs about 950kg, a shade over a bag. The MOT Type 1 underneath runs to roughly 968kg for 11m² at 5cm, again just over a bag. Measure your length and width, run the numbers through our gravel calculator, and round up.
Match the stone to the job, then pick the colour you want. Colour is the one decision I leave entirely to clients, since they are the ones looking at it every day; my rules are about shape and size, not shade. Cotswold chippings give the classic warm buff path, granite chippings are the hard-wearing choice for a route that gets hammered, and the self-binding gravels are the answer when wheels matter more than crunch. The rest of the palette is in our decorative stone range.
Two small things that save regret. Most people are perfectly happy with the stone as it arrives, but if you are torn between two colours or matching something already in the garden, a sample is worth having, and wet half of it before you decide, since British gravel spends much of the year darker than the yard photo. The other trick (mainly for professional landscapers) is to pick a sub-base close in colour to your surface gravel. Fresh gravel scuffs thin in the first weeks of traffic, and a matching base makes it invisible.
Next Steps
Measure your route, decide between crunch and firmness, and put your dimensions through the gravel calculator. We carry path gravels from 6mm to 20mm, MOT Type 1 and heavy-duty membrane, all with nationwide delivery, and if your job is an odd one, get in contact and we will talk it through before you order a tonne of the wrong thing.
Have you built a gravel path in your own garden? How wide did you go, and does it stay put when the barrow goes down it? Let us know in the comments.
FAQs
How deep should gravel be on a path?
Loose gravel on a path should be 3–5cm deep over a compacted base, and never much more than twice the stone size. Deeper gravel does not make a stronger path, it makes a softer one.
Do you need a membrane under a gravel path?
A membrane under a gravel path is worth laying as a separator, keeping the stone and soil from mixing and slowing aggressive roots. It will not stop windblown weeds seeding into the surface, so budget for a little light weeding regardless.
Can you lay a gravel path straight onto soil?
Gravel laid straight onto soil will tread into it and sink, giving you muddy stone within a season or two. At minimum, compact the ground hard and lay a membrane first, and accept it as a light decorative path that needs topping up. For anything walked daily, build the 10cm sub-base.
What size gravel is best for a path?
A 6–14mm angular gravel is best for a path, and anything up to 20mm works well. Angular stone packs tighter and harder as it beds in, so the larger sizes hold up to heavier use. Above roughly 38mm the stone shifts too much to walk on comfortably.
How do you stop gravel spreading onto the lawn?
Gravel stays off the lawn when the path has solid edging finishing slightly proud of the stone, and when the stone itself is angular rather than rounded. A quick rake back after winter deals with the few that still make a run for it.
Is pea gravel any good for paths?
Pea shingle makes a genuinely comfortable path, and it is the softest gravel underfoot. Use it on flat, low-traffic decorative runs and it earns its place; use it on a slope or a main route and you will spend years raking it back uphill.