A customer asked me which gravel to use for his driveway. When I visited the property, I could see he had already bought three bags of decorative pea gravel from a garden centre and spread them near the gate. Within a week he'd phoned to say the gravel kept being kicked onto the road by his car tyres and the bags were already nearly gone.
Round, small pea gravel is a decorative product. It has no grip for vehicles or pedestrians, disperses under traffic, and is impossible to keep contained at edges. For a driveway, you want angular aggregate.
The main gravel types and their uses
Pea gravel (6-10mm round)
The classic small, smooth, rounded stone - often cream, buff or mixed. Naturally weathered, these stones have no sharp edges.
Best for: Decorative garden areas, pet runs, under decking, between stepping stones, areas with no vehicle or pedestrian traffic.
Not suitable for: Driveways, paths with regular foot traffic. The round stones provide no grip and will move under load.
Depth: 30-50mm for decorative use.
Driveway gravel / angular crushed stone (14mm-20mm)
Crushed granite, limestone or basalt in angular, irregular shapes. The sharp edges mean stones interlock and resist movement.
Best for: Driveways, hardstandings, areas with regular vehicle access.
Why it works: The angular shape creates friction and interlocking between stones. Under tyre pressure, the stones lock into position rather than being displaced.
Common types:
- 20mm granite: grey/silver, clean, popular for driveways
- 20mm limestone: buff/cream, slightly softer but widely available
- 14mm shingle: smaller option with slightly better compaction
Depth: 50mm on a compacted Type 1 sub-base for driveways. 30-40mm on a firm existing base.
Self-binding gravel (dust-bound)
A naturally graded mix including dust and fines (typically a sandy-coloured limestone or hoggin). When compacted and wetted, the fines bind the coarser particles to create a semi-solid surface.
Best for: Paths, garden tracks, countryside-style drives where a more natural appearance is wanted. Not suitable for heavy vehicle use.
The binding effect: Rain compacts the fines into a firm surface. In dry weather it can surface-harden; in wet weather the fines can wash away if not properly contained.
Depth: 75-100mm compacted for paths; 100-150mm for light vehicle use.
Shingle / pea shingle (10-20mm)
Similar to pea gravel but slightly larger and often mixed shapes. More common in southern England.
Best for: Decorative paths, drainage layers, driveways with low vehicle use.
Note: Standard shingle is partially rounded and provides better grip than pure pea gravel but less than angular crushed stone.
Slate chippings (20-40mm)
Thin, flat, irregular pieces of blue-grey slate. Very distinctive appearance.
Best for: Decorative garden areas, mulching around plants, between paving slabs.
Not suitable for: Driveways (moves and disperses under vehicles), paths with bare feet (sharp edges).
White marble chippings / decorative aggregates
Crushed white marble, calcite, or other decorative stone in various grades.
Best for: High-end garden borders, around architectural plants, interior landscaping.
Note: Premium pricing; primarily decorative.
MOT Type 1 / crusher run
Not technically a finished gravel but a crushed stone sub-base material with a wide particle size range.
Best for: Sub-base beneath driveways, paths and patios. Not used as a surface finish but essential beneath surface aggregates in load-bearing applications.
Summary table
| Gravel type | Vehicle use | Pedestrian | Decorative | Drainage |
|---|---|---|---|---|
| Pea gravel (6-10mm) | No | Poor | Yes | Good |
| Angular 20mm granite | Yes | Good | Moderate | Good |
| Self-binding hoggin | Light | Good | Natural | Moderate |
| 14mm shingle | Limited | Moderate | Moderate | Good |
| Slate chippings | No | Poor | Yes | Moderate |
My tips on choosing gravel
Visit a merchant's yard before ordering. Photographs online give a misleading sense of colour. Wet stone looks different from dry stone and varies between quarries. Most merchants have samples or display areas.
Use containment edging. Gravel without edging boards or kerb stones migrates onto lawns and paths. Timber edge boards, steel strip edging or concrete kerbs keep loose gravel in place.
Buy more than you think you need. Gravel compresses, is walked into the ground over time, and some is always lost at edges. For a new driveway, add 15% to your calculated quantity.
For driveways, the sub-base matters as much as the gravel. The most common cause of gravel driveway failure is inadequate sub-base preparation. Gravel on bare soil sinks, displaces and creates ruts. A properly compacted 150mm Type 1 sub-base beneath the gravel is not optional.
Use the Gravel Calculator to work out how many tonnes you need for your project.