White Limestone Gravel, 20mm: 20kg Bag

All of our products are available in aggregate bulk bags, with one bag covering approximately 10m2(slight variations between product types).

Each outdoor project requires different amounts of aggregate, depending on the size and depth of the driveway, pathway or border and which aggregate product you choose. The key to buying the correct quantities is understanding the depth of material required. Accurate calculations to guide purchases prevent issues like visible weed membrane (caused by too little product) or pooling and displacement (too much product).

For a simple way to work this out, we’ve designed a gravel calculator that will take all of your measurements and get you an accurate calculation. 

When designing a driveway, it’s important to choose aggregates that are high-performing and durable, as well as attractive.For ultimate durability and stability, we recommend 14-20mm angular chippings. These interlock more effectively than rounded stones, providing a firm surface that is less prone to movement underfoot or vehicle use. At 14-20mm in size, this is large enough to prevent the stones from getting stuck in the tyre tread.

Pathways need to be both stable and comfortable to walk on. Gravel and chippings in the 10-20mm range work well for this, as well as small (20mm or smaller) rounded pebbles.

For sloped paths with a gradient greater than 1:20, consider using stabilising grids to prevent material movement. Specialist pathway materials, like Goldpath, provide a compacted, even finish, making them ideal for well-trodden areas.

Many of our aggregates become even more visually striking and impactful when wet, making them a fantastic choice for water features and ponds. 

For fish ponds, avoid using marble, dolomite or limestone as they can alter water pH levels. We have specific fish-friendly products which carry the fish-friendly mark.

To protect pond liners, we recommend using smooth, rounded materials like pebbles or cobbles to prevent punctures. 

Decorative aggregates are a versatile option for borders and raised beds. Combining chippings, pebbles, cobbles and boulders can create stunning visual interest and texture. To brighten up shaded areas, consider using lighter-coloured aggregates to reflect light and lift the space. 

Many of our premium aggregates are meticulously washed to remove fine particles and silt. This results in a cleaner, more vibrant finish. Washed aggregates provide an immediate polished appearance, perfect for outdoor projects where aesthetics are a priority. 

For those opting for unwashed products, a simple rinse after laying can achieve a similar effect. As the water flows through, the fine particles naturally settle underneath the surface, leaving a clean and uniform top layer. 

Whether you choose washed or unwashed, both options offer excellent functionality and appearance, depending on your project needs.

Long Rake Spar is the largest importer of specialist decorative aggregates in the UK. A selection of our imported products are sourced by road via bulk tippers from various European locations, while large volume, core products are imported by sea in bulk shipments. We currently have four dock and production sites across all corners of the UK. 

Discover more about our facilities and processes here.

Sustainability is at the heart of the Long Rake Spar business as we work toward becoming a carbon-neutral company by 2030. The company is committed to various sustainable practices, including eco-friendly packaging, transportation, operations and sourcing. We are also delighted to hold a PlanetMark Business Certification.

Long Rake Spar was also awarded the ProLandscaper Supplier Sustainability and BioDiversity of the Year Award in late 2025.

Find out more about our sustainability efforts here.

Loose loads of our aggregate products are available upon request.

Please contact us at Sales@ashbrookroofing.co.uk for more information.