Introduction

As a professionals in the paving and construction industry, we cannot emphasize enough that the success of any cabro project depends heavily on what happens before the first block is laid. The foundation sets the tone for durability, aesthetics, and cost-effectiveness. Too often, we’ve seen homeowners and contractors rush to installation, only to face issues like sinking cabros, uneven patterns, or water damage within months.

This step-by-step guide will walk you through the critical process of preparing the ground for paving block installation. When done correctly, it ensures that your cabro surface remains strong, attractive, and long-lasting.

Step 1: Site Clearance and Planning

Before any physical work begins, clear the area of debris, vegetation, and soft soil. Good planning means understanding the space, measuring the dimensions, and mapping out drainage paths. Proper site clearance avoids hidden weaknesses later.

Step 2: Excavation

Excavate the area to a depth of 150mm to 200mm, depending on traffic load. For light walkways, less depth may suffice, but for driveways or commercial zones, deeper excavation ensures a stronger base. This stage creates the “bed” where all other layers will sit.

Step 3: Base Compaction

The strength of cabro comes from its base. Compact the excavated ground using a mechanical roller or plate compactor. This stabilizes the soil and reduces future shifting. A poorly compacted base is the leading cause of sinking and uneven paving.

Step 4: Laying the Sub-Base

Spread a layer of hardcore (murram or crushed stone) about 100mm thick and compact it thoroughly. The sub-base distributes weight evenly, making the surface resilient to heavy loads. Ensure proper leveling here—it saves headaches later.

Step 5: Sand Bedding Layer

Lay a 30–50mm layer of fine sand or quarry dust. This acts as a cushion for the cabros and helps achieve uniform levels. Level it carefully with screeds and avoid walking over it unnecessarily.

Step 6: Drainage Considerations

Water is the greatest threat to paving longevity. Design gentle slopes (about 1–2%) to direct water away from paved areas. Add drainage channels where necessary. Good drainage protects your investment.

Step 7: Edge Restraints

Install strong kerbs or edge restraints before laying cabros. These hold the paving in place, preventing blocks from spreading under pressure. Neglecting this step weakens the entire structure.

Conclusion

Ground preparation is not just about digging and filling — it is about precision, stability, and foresight. Each step, from excavation to drainage, contributes to a foundation that supports your cabros for decades. As professionals, we know that cutting corners here is the quickest way to invite future repairs and costs.

👉 At Limblocks Limited, we ensure every project starts with the strongest foundation possible. That’s why our clients enjoy lasting, beautiful paving solutions year after year.