Why so many gravel paths end up loose and shifting

A gravel path that spits stones into the borders every time you walk on it is almost never the gravel's fault. Nine times out of ten the problem lies underneath: an uncompacted sub-base that settles unevenly, no proper edge restraint, or a gravel that is too round and too small to lock together. Get those three things right and you end up with a surface that feels almost like a firm, crunchy carpet — pleasant underfoot in dry weather, stable enough for a wheelbarrow, and easy to top up when it needs it.

The order of work matters as much as the materials. Excavate, edge, sub-base, compact, then gravel. Skipping ahead will cost you a weekend of remedial work later.

Build a sub-base that will not move

Everything rests on the sub-base. For a pedestrian path, aim for a compacted depth of 75–100mm of MOT Type 1. If the path will take a wheelbarrow, a ride-on mower or the occasional car, go to 150mm. Dig out the full area, plus the thickness of your edging, and allow roughly 100mm on top of the finished gravel level so your materials sit below the surrounding turf.

Lay a woven geotextile membrane over the bare soil. This is not the same as plastic sheeting — it lets water through while stopping soil from pumping up into the stone. Then:

• Tip the Type 1 in and spread it in two layers of around 50mm rather than one thick dump.
• Compact each layer with a plate compactor, working in overlapping passes and giving corners and edges extra attention.
• Dampen the stone slightly as you go; a little moisture helps the fines bind.
• Check levels constantly against a string line, and rake out any hollows before the final pass.

When you are finished, the surface should ring dull and solid underfoot, not spring or crumble.

Choose gravel by size and shape, not by colour alone

Shape matters more than most people expect. Angular, crushed stone interlocks and stays put. Rounded pea shingle rolls over itself and will migrate off the path no matter how good your edging is. For a footpath, 10mm angular gravel is the sweet spot — comfortable to walk on and stable once compacted. Step up to 14–20mm if the path sees vehicle traffic.

Self-binding gravels are worth considering for a more formal finish. These mixes contain fine dust alongside the stones, and once watered and compacted they knit into a firm, almost concrete-like crust that resists scuffing. They suit a straight path to a front door beautifully, though they need occasional raking and topping up.

• 10mm angular: best all-round choice for pedestrian paths.
• 14–20mm angular: driveways and heavier use.
• Self-binding: a firmer, tidier surface with more upkeep.
• Avoid below 8mm on open paths — it gets kicked into the lawn.

Edging keeps the stones where you put them

Edging is the single most overlooked element, and the one that decides whether your path looks sharp in three years' time. Whatever you choose, it needs to sit flush with the finished gravel or stand 10–20mm proud, and it must be fixed firmly enough that it does not spread under load.

• Treated timber: the cheapest option, pegged every 600mm and screwed at joints. Choose a rot-resistant species and expect to replace it eventually.
• Flexible steel edging: discreet, long-lasting and ideal for curves, provided it is pinned properly.
• Granite setts or concrete kerbs: bedded on a concrete mix, these are the most durable and look excellent against gravel.

Run the edging first, then bring your sub-base up to it. This gives you a solid lip to rake against and stops the edges of the path from splaying outwards.

Laying the gravel and compacting it in

Spread your chosen gravel to a loose depth of about 40mm over the compacted sub-base — this settles to roughly 30mm once compacted, which is deep enough to look generous but shallow enough to stay firm. Rake it level, then run the plate compactor over the whole path in two directions. Yes, compacting gravel is worth the effort: it beds the stones into the sub-base, reduces movement and makes the surface noticeably easier to walk on.

Give the path a fall of about 1:60 away from buildings, or shape a gentle crown so water runs off to the sides. On heavy clay, a shallow soakaway or a French drain at the low end will save you from a path that turns boggy every January.

Keeping it firm season after season

A gravel path is a low-maintenance surface, not a no-maintenance one. Rake it once a year to redistribute stone that has drifted, and top up where it has thinned — usually around 10mm every two or three years. Keep fallen leaves off it through autumn, since damp leaf litter encourages weeds and softens the crust of self-binding gravel. Pull any weeds promptly while they are small; once their roots reach the membrane, they are much harder to shift. Check your edging each spring and knock back any pegs or fixings that have worked loose, and the path will keep that firm, settled feel for a decade or more.