40mm Castella Aggregate

Strong, coarse, and highly durable | Exceptional drainage performance

Our 40mm Castella Aggregate is a single-sized, coarse crushed stone blend engineered for heavy-duty landscape and civil applications. With its large particle size, it’s ideal where strength, permeability, and structural stability are required.

Castella’s 40mm B-Grade Aggregate is widely used across construction, drainage, roads, and landscaping projects. Its robust nature makes it suitable behind retaining walls, in driveway sub-bases, for large-scale drainage trenches, and as a foundational component in landscape and garden supply projects.

Ideal for:

• Sub-base for heavy-duty driveways, roadworks & concrete slabs
• Drainage trenches, French drains & stormwater systems
• Backfilling behind retaining walls and bulk landscape walls
• Structural foundations in large-scale landscaping
• Agricultural paths, hardstand areas & rural projects

Key Features:
✅ Large 40 mm particle size for superior strength & load-bearing capacity
✅ Excellent drainage 
✅ Clean, screened B-grade aggregate ready for use
✅ Suited for structural, civil and landscape supply use

Available in bulk or by the cubic metre for pickup or local delivery across Eltham, Research, Diamond Creek, Greensborough and surrounding suburbs