Crushed Rock CL4 - 20mm
20mm Class 4 crushed rock ideal for driveways, paths, compacted bases and general construction use.
- Orders under 1m³ require manual pricing — please contact the store to order.
- Delivery limits apply due to volume and loading constraints; some orders may require separate deliveries.
Crushed Rock Class 4 (CL4) - 20mm is a high‑quality, graded rock blend commonly used for compacted bases, driveways, pathways and general construction preparation. Its strong 20mm aggregate structure provides excellent compaction, stability and load‑bearing performance for both residential and commercial projects. The CL4 grading ensures a consistent mix of fines and stone, allowing the material to bind firmly when compacted, creating a durable and reliable foundation. Suitable for under‑slab preparation, pavement bases, shed pads, landscaping works and general site fill, this crushed rock offers dependable performance across a wide range of applications.
Common Uses
- Driveways and pathways
- Compacted bases for paving and concrete
- Under‑slab preparation
- Shed pads and hardstand areas
- General site fill and landscaping foundations
Related Products
Crush Rock 20mm
A hard-wearing 20mm crushed rock for driveways, pathways and a firm compacted base.
Rock Dust
Fine 5mm crushed rock that packs down tight as a bedding layer under pavers and slabs.
Drainage Scoria
Lightweight volcanic scoria that drains fast behind retaining walls and around ag pipe.
POPULAR Aggregate (Bluestone)
Clean bluestone aggregate for exposed concrete, general concreting and drainage.