The limestone is available in a range of sizes to suit your landscaping project:
14mm, used for driveways although not ideal due to the small size sticking in shoes and boots!
20mm, this is ideal for paths and driveways as the gravel interlocks
40mm, this is used extensively for drainage
How much you need will depend on the depth of the slate and effect you are wishing to create.
However, as a guide please allow 1 bulk bag for every 15m2 (at a depth of 50mm) Your eco bulk bag will hold aprox 850kg, saving you extra money Weed suppressant Although Welsh limestone will act as a weed suppressant, it is advisable to lay a special membrane under your slate, this allows the water to drain away and keep the weeds away.
This can be added to your order and is sold per m2, allowing you to only Buy what you need, no waste!