40mm Castella Aggregate Bulk

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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 40mm 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 Show more