Welsh Blue Slate 20mm

SKU Code: BS20HS

Welsh Blue Slate 20mm

SKU Code: BS20HS



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Our Blue Slate is a best seller colour and size in our slate range.

Discover the beauty of blue slate 20mm and add style to your outdoor space! This stunning 20mm blue slate is perfect for creating a striking outdoor area that you’ll love to relax and entertain in. With its beautiful blue colour, this slate will add a touch of sophistication to your garden. It’s also incredibly durable, so you can be sure it will withstand the wear and tear of the elements for years to come. Plus, it’s easy to maintain and install, so you can enjoy the beauty of blue slate 20mm without any hassle. Buy now and create the outdoor area you’ve always dreamed of!

Average Size: 10-30mm

Colour: Blue

Shape: Angular

Approx Bag Weight:

Single Bags – 20kg
25 x 20kg Single Bag(s) – 500kg
50 x 20kg Single Bag(s) – 1 Ton
Bulk Bags – 850kg

Disclaimer – A natural process of oxidation can occur on this decorative stone, it may appear to look slightly rusty, this is completely natural and can be caused by several external factors such as, weather, pets, ground laid on or general change in environment. Whilst this can look different to product, it also adds character and offers a very natural look and feel.

Try before you buy? Order a sample of this aggregate below

FREE DELIVERY!* Free delivery to most U.K mainland postcodes usually within 7 working days (calculated at checkout)

Features of Welsh Blue Slate 20mm include:

  • FAST & FREE Delivery!*
  • Upgrade to Next Day or Saturday Delivery
  • Time slot provided on day of delivery

Main Benefits of Welsh Blue Slate 20mm:

  • Ideal for driveways, beds, boarders & many landscaping projects
  • Instant, easy garden transformation
  • Suppresses weeds, improves drainage & Low maintenance

Purchase with Confidence

We deliver using a tail-lift and pump truck - not a crane delivery. Therefore it is important to understand delivery will be made to the nearest flat hard standing surface (not on grass, gravel or sloping areas). If it is to go on to a property driveway, it is down to the driver’s discretion if it is viable for him to do.

Bags will be delivered on a wooden pallet and the driver will require a signature as proof of delivery.

If your property is down a narrow country lane or narrow drive way or has sharp bends, PLEASE can you add notes to the order so we can make a successful delivery first time every time. If the pallet company has to come back to redeliver there will be a charge.

Most deliveries are with our customers within 3 to 5 days.

Gravel Calculator

Not sure how much stone you need? Use our handy calculator tool to help you. If you would like more advice please call us on 0113 320 0890


What our customers say...

Online Gravel Calculator

Pre pack bags


Bulk bags required


*This calculator is only intended as a rough guide to help you approximate the likely volume of gravel, slate or other aggregates needed for your project.

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