Why Winter Is the Real Test of a Gravel Path

A gravel path is one of the most forgiving surfaces you can lay in a British garden. It handles foot traffic, drains readily, and looks settled the moment it goes down. Then January arrives, and within a few weeks the same path can look rutted, patchy and half-empty, with chippings scattered across the lawn and weeds pushing up through the middle. The difference between a path that survives to spring and one that doesn't almost never comes down to the gravel itself. It comes down to what is underneath it and how well it is held at the edges.

The good news is that getting this right adds perhaps a weekend of work and a modest amount of extra material. Once done properly, a gravel path will shrug off frost, rain and the occasional wheelbarrow for a decade or more.

Building a Sub-Base That Won't Move

Gravel is only ever as stable as the layer beneath it. If you tip chippings straight onto soil, the first heavy rain will soften the ground and the gravel will simply sink or migrate. You need a compacted sub-base that spreads the load and stays firm when saturated.

The standard approach is a layer of MOT Type 1, a crushed stone aggregate available from any builders' merchant. Aim for 100mm compacted depth for a garden path with foot traffic and occasional barrows. For anything that will take a car or a ride-on mower, go to 150mm.

• Excavate to around 150–200mm below your finished level, allowing for the sub-base, the gravel and a slight fall.
• Firm the bottom of the trench with a plate compactor or a heavy hand tamper.
• Lay the Type 1 in two layers of about 50–60mm each, watering lightly and compacting each one before adding the next.
• Check the levels as you go. A fall of roughly 1:60 away from the house encourages water to run off rather than pool.

Compact until the surface rings hard underfoot and a boot heel leaves no dent. This is the single most important step, and it is the one most often rushed.

Weed Membrane: Cheap Insurance

A woven geotextile membrane laid over the compacted sub-base will not stop every weed, but it dramatically reduces the ones that germinate from below and it stops gravel from working its way down into the sub-base over time. That second benefit is easy to overlook, yet it is the reason old paths go bald and need topping up.

Choose a woven, non-biodegradable membrane rather than the thin black sheeting sold for temporary use. Overlap the joints by at least 100mm, and turn the edges up slightly against any edging so the gravel cannot slip underneath. If you are laying the path over heavy clay that holds water, a membrane still helps, but make sure the sub-base is properly compacted first, as trapped moisture will make soft ground softer.

Edging That Holds Everything Together

Loose chippings spread. It is in their nature. The fix is a firm edge on both sides, and this is where many gravel paths quietly fail. Without it, the gravel creeps into borders, the border soil creeps into the gravel, and the path slowly widens into an untidy mess.

You have two good options, and both should sit slightly proud of the finished gravel level:

• Stone or brick setts, bedded on a 100mm concrete mix and haunched with mortar on the outside. This gives the crispest finish and lasts longest, but it is the more laborious route.
• Tanalised timber in 100 x 50mm or similar, set into the ground with sturdy pegs every 600mm and the top edge just above the gravel. Quicker, softer-looking, and perfectly adequate for a garden path.

Whatever you choose, run it the full length of both sides and pin it firmly. A wobbly edge will let the gravel escape within a season.

Choosing and Laying the Gravel

For paths, smaller is generally better. A 14–20mm gravel is comfortable to walk on, stays put reasonably well and doesn't feel like walking on ball bearings. Larger 20–40mm stone looks coarser, is harder underfoot and shifts more readily. Self-binding gravels such as hoggin are another option if you want a firmer, more compacted surface, though they are less free-draining.

Spread the gravel to a depth of about 40–50mm over the membrane, rake it level, and then compact it lightly with a plate compactor fitted with a rubber mat or with a roller. Take care not to tear the membrane.

Fill to just below the top of your edging, not level with it. That small lip stops chippings spilling over when the path is swept or when heavy rain runs across it.

Getting It Through to Spring

Once laid, a gravel path needs very little attention. Rake it back into shape after windy weather, top up any thin patches in early spring, and keep an eye on the edging after the first hard frost, since freeze-thaw cycles can nudge timbers out of line. A quick pass with a stiff broom clears moss and leaf litter before it breaks down into the surface.

Do those three things — a properly compacted sub-base, a decent membrane and a firm edge — and your path will still look crisp and level when the daffodils come up. Skip them, and you will be rebuilding it next February.