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This is a naturally occurring product and there can be variations in colour. We always photograph the product after washing because it can be dusty when you receive it.
Protect Your Gravel —
Add Weed Membrane
  • Extends the life of your decorative stone
  • Improves drainage and reduces muddy areas
  • Saves time, effort, and long-term maintenance costs
  • Stops weeds from growing through gravel
  • Prevents stones from sinking or mixing with soil
Weed Membrane Installation Guide

Prepare the Ground

Clear and level the area.

Lay the Weed Membrane

Roll out evenly across the surface.

Secure in Place

Fix with ground pegs.

Add Your Covering

Finish with gravel or stone.

Why Choose Gravel Stabilisation Grids
  • Stops gravel movement
    Prevents rutting, spreading, and sinking
  • Load-bearing strength
    Supports vehicles, driveways, and parking areas
  • Stable walking surface
    Safe for pedestrians, bikes, and wheelchairs
  • Permeable drainage
    Prevents puddles and surface water build-up
  • Low maintenance
    No constant raking or topping up gravel
  • Long-lasting durability
    Protects gravel layer and base structure
How to use gravel grid to stop gravel migration

Prepare the Ground

Mark the area, excavate to required depth, then install and compact a solid sub-base (MOT Type 1 or similar).

Level & protect

Apply a thin leveling layer of sharp sand and lay weed membrane.

Install grids

Place and connect the grid panels evenly across the prepared surface.

Fill with gravel

Fill cells with angular gravel and level slightly above the grid.

Plum Welsh Slate Chippings 20mm

The smallest of the two sizes of Welsh Plum Slate Chippings. A mauve purple with the odd blueish piece mixed in. Also available... Plum Welsh Slate Chippings 40mm
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From £4.32

To £183.60

In stock
Delivery Quote? Add products. Click yellow Add to Trolley. Click green Shopping Trolley. Enter your postcode.
Please note: The majority of orders are delivered on the day you select, Occasionally deliveries can be delayed due to unforeseen circumstances beyond our control. If you have someone booked to lay the gravel for you it is always better to aim for delivery before it will be needed to prevent problems.
Grouped product items
Product Quantity Subtotal

Plum Welsh Slate Chippings 20mm (Bulk Bag)
£60.12

Attributes:

  • Grouped Thumbnail Text Bagged StandardBulk Bag (800kg*)
£0.00
Subtotal is VAT included.

Heavy Duty Weed Membrane + 20 FREE Pegs
£19.44

Attributes:

  • Grouped Thumbnail Text Weed PreventionHeavy Duty Weed Membrane + FREE Pegs
£0.00
Subtotal is VAT included.

Gravel Stabilisation Grids (10x required for each Bulk Bag)
£153.00

Attributes:

  • Grouped Thumbnail Text Weed PreventionGravel Stabilisation Grids (10x for each Bulk Bag)
£0.00
Subtotal is VAT included.

Plum Welsh Slate Chippings 20mm (Poly Bag)
£4.32

Attributes:

  • Grouped Thumbnail Text Bagged StandardPoly Bag (20kg*)
£0.00
Subtotal is VAT included.

Plum Welsh Slate Chippings 20mm (50 Poly Bags)
£92.88

Attributes:

  • Grouped Thumbnail Text Bagged Standard50 Poly Bags (1000kg*)
£0.00
Subtotal is VAT included.

Gravel Stabilisation Grids (12x required for each 50 Poly Bags)
£183.60

Attributes:

  • Grouped Thumbnail Text Weed PreventionGravel Stabilisation Grids (12x for each 50 Poly Bags)
£0.00
Subtotal is VAT included.

Plum Welsh Slate Chippings 20mm (25 Poly Bags)
£77.76

Attributes:

  • Grouped Thumbnail Text Bagged Standard25 Poly Bags (500kg*)
£0.00
Subtotal is VAT included.

Plum Welsh Slate Chippings 20mm (Sample)
£3.96

Attributes:

  • Grouped Thumbnail Text Bagged StandardSample
£0.00
Subtotal is VAT included.
* Approximate weights: Bulk Bags 800kg • Poly Bags 20kg • 25 Poly Bags 500kg • 50 Poly Bags 1000kg. The bag sizes are uniform, but the size, shape and density of the aggregate can affect the perceived volume.
The smaller of the two plum mauve coloured slates. Quarried in Wales this is an environmentally friendly product made from the slate left over after roofing tile production. The 20mm grade is the more popular of the two sizes for paths and drives. Like the blue version these chippings tend to bed down and lay flat making them ideal for walking on. It also looks great when used in rockeries, ponds, water features, screes, borders and decorative landscaping. As a mulch it is effective as helps retain moisture in planting areas and is a good weed suppressor but should still be used with weed prevention membrane. It provides a stylish look to any garden and is very striking when wet. Slate is a natural product so be aware that your order may contain the odd random blue or green pieces. Sometimes even one piece may be multiple colours. The approximate length of the chippings ranges between 10-30mm. The recommended depth for laying is roughly 30-40mm. Also available... Plum Welsh Slate Chippings 40mm

Depth for 20mm Graded Slate Chippings

The recommended laying depth for this size is estimated to be between 30mm and 40mm.

More information and examples of other sizes and types of aggregates are available in our Aggregate Depth Laying Guide.

  • 20mm slate chippings at 40mm deep
  • 20mm slate chippings at 30mm deep
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