This flat decorative slate is characterised by its rich blue tones, bringing a touch of understated sophistication to any landscape.

The slate’s colour naturally deepens when wet, providing an eye-catching contrast and enhancing the visual appeal of your garden, especially during rainy days. Its versatility makes it an ideal choice for those seeking to infuse a contemporary aesthetic into their landscape design. Perfectly suited for decorative landscaping, 20mm Blue Slate is particularly effective around pathways, walkways, and borders, adding both style and practicality. As a decorative mulch, it offers the added benefit of helping to retain moisture in flower beds and borders, promoting healthier plants and reducing garden maintenance.

  • Size: 20mm
  • Weight: Approx. 25kg
  • Rich blue tones deepen when wet
  • Ideal for pathways and walkways
  • Decorative mulch for borders and beds
  • Helps retain soil moisture
  • Suitable for ponds and water features

£4.99 Standard Delivery, or FREE on most orders over £99* (some exclusions apply)

£9.99 Next day delivery is available for orders places before 12 noon. Any orders placed for next day delivery after this time, will take 2 working days to be delivered.

Working/delivery days are Monday to Friday, deliveries will not normally be made Saturday or Sunday.

We offer a 30-day returns policy on on the majority of our items*, as long as the item is unused, undamaged and unopened**. We only ask that the postage is covered by yourself. 


* Please see our delivery page for further details on specific exceptions.

** Some products that are made to order or personalised cannot be returned.

***Exclusions apply for items shipped directly from our suppliers, and some big & bulky items may incur an additional charge. Please see our delivery page for full details. 

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Chas Long 25KG 20mm Blue Slate Decorative Aggregate

  • £5.99
  • (Delivery from £1.21 )
1+ 15+ 25+ 40+
£5.99 £4.99 £4.50 £3.99
Item in Stock   |   Usually dispatched within 24 hours
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Free UK Delivery on most orders over £99
Delivery Rates & Information

Delivery Options

Standard Delivery: £4.99 - Free for all orders over £99.*
Next Day Delivery: £9.99 - Available for orders placed before 12:00 PM (Noon).

Important Delivery Notes

Next Day Delivery Cut-off: Orders placed after 12:00 PM (Noon) using Next Day Delivery will be delivered within two working days.
Working Days: Our standard delivery and shipping days are Monday through Friday. We do not normally deliver on Saturdays or Sundays.

Easy 30-Day Returns

We want you to be happy with your purchase! We offer a 30-day returns policy on all items, provided the following conditions are met:
  • The item is unused and undamaged.
  • The item is returned in its original packaging.
  • The customer is responsible for the return postage costs.

Combining Your Order

We always strive to combine your order into a single delivery. However, your order may arrive in multiple shipments if it contains:
  • Items from different warehouses (Standard items).
  • 'Direct' items (These are shipped separately and directly from the supplier) and will arrive separately from other items in your order.

*Exclusions & Additional Charges

The following items may be excluded from standard shipping rates or may incur extra delivery charges:
  • Items Shipped Directly from Suppliers ('Direct' items).
  • Certain Large or Bulky Items.
Want it by Wednesday 14th October? Order within 4 days, 18 hours, 50 minutes