# Drainage Gravel | 20mm Free-Draining Stone for Drainage & Paths

Drainage Gravel is a practical 20mm stone for improving drainage in landscaping and building projects. It gives a stable, permeable layer that lets water through instead of pooling — ideal around drainage runs, behind retaining walls, under paths and driveways, and around the base of garden buildings. Its natural browns, greys and buffs also make it a tidy, budget-friendly top-dressing.

## Product Details

-   **Stone:** Natural gravel
-   **Colour:** Brown, grey and buff
-   **Grade:** Approx 20mm down
-   **Best for:** Drainage runs, driveways, paths and around garden buildings
-   **Pack sizes:** Jumbo bulk bag (approx 1,000kg), standard bulk bag (approx 750kg), midi bulk bag (approx 500kg), or 25kg handy bags in packs of 10, 20 or 40
-   **Coverage:** Approx 10–12m² per tonne at 50mm (2in) depth
-   **Natural stone:** Shades vary between batches
-   **Supplier:** Dandy's Topsoil & Landscape Supplies

## Also in the Landscaping Range

-   [Soakaway Stone](/products/soakaway-gravel-stone-60-140mm-jumbo-bag)
-   [Welsh Brown Gravel](/products/welsh-brown-gravel)
-   [Sand & Gravel Ballast](/products/sand-and-gravel-mix-ballast)

Browse more in our [Building & Drainage Aggregates](/collections/building-drainage-aggregates) range, or explore the full [Landscaping](/collections/landscaping) collection at Oak & Outdoor.

## Details

- **Price:** 115.0 GBP - 259.15 GBP
- **Vendor:** Dandy's Topsoil & Landscape Supplies
- **Type:** Gravel, Slate & Aggregates
- **Tags:** Building Aggregates, Dandy's Topsoil & Landscape Supplies, Gravel, Landscaping, Shopify Collective

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Jumbo Bulk Bag approx 1000kg ⭐️ BEST BUY! | 142.00 GBP | In stock |
| Standard Bulk Bag approx 750kg | 129.00 GBP | In stock |
| Midi Bulk Bag approx 500kg | 115.00 GBP | In stock |
| 40 x 25kg Handy Bags | 259.15 GBP | In stock |
| 20 x 25kg Handy Bags | 171.75 GBP | In stock |
| 10 x 25kg Handy Bags | 128.05 GBP | In stock |

## Images

- Drainage Gravel | 20mm Free-Draining Stone for Drainage & Paths
- Drainage Gravel | 20mm Free-Draining Stone for Drainage & Paths
- Drainage Gravel | 20mm Free-Draining Stone for Drainage & Paths
- Drainage Gravel | 20mm Free-Draining Stone for Drainage & Paths
- Drainage Gravel | 20mm Free-Draining Stone for Drainage & Paths
- Drainage Gravel | 20mm Free-Draining Stone for Drainage & Paths
- Drainage Gravel | 20mm Free-Draining Stone for Drainage & Paths

---

> Source: [Oak & Outdoor](https://oakandoutdoor.co.uk/products/drainage-gravel)
> Updated: 2026-10-27