Quick Answer
The 1.7T mini excavator is ideal for most residential shed slab preparation in NSW — stripping topsoil, excavating footings, and grading the sub-base. For larger sheds, the 3.5T is more productive.
## Excavator Hire for Shed Slab Preparation in NSW Building a new shed is one of the most popular owner builder projects in NSW. Proper slab preparation is critical — a well-prepared sub-base means a level, crack-free slab that lasts for decades. ### Shed Slab Preparation Steps **1. Strip topsoil:** Remove all topsoil and organic material from the slab footprint. Topsoil compresses over time and causes slab settlement. Strip to a minimum depth of 150mm, or until you reach firm, stable subsoil. Recommended machine: 1.7T mini excavator **2. Excavate footings:** Most shed slabs use a thickened-edge slab (waffle pod or conventional) with deeper footings around the perimeter. Typical footing dimensions: 300–450mm wide, 300–450mm deep. Recommended machine: 1T or 1.7T mini excavator **3. Grade the sub-base:** Grade the sub-base to a uniform level using the excavator bucket. A laser level or builder's level is essential for accurate grading. Recommended machine: 1.7T mini excavator **4. Compact the sub-base:** After grading, compact the sub-base with a plate compactor (hire separately from a tool hire depot). The excavator cannot compact the sub-base — a separate compactor is required. **5. Install drainage:** If the site has drainage issues, install ag-pipe around the perimeter of the slab before pouring. The 1T mini excavator is ideal for ag-pipe trenches. ### Shed Slab Sizes and Machine Requirements | Shed Size | Slab Area | Recommended Machine | Estimated Hire Duration | |---|---|---|---| | Small (3m × 6m) | 18m² | 1T | Half day | | Medium (6m × 9m) | 54m² | 1.7T | 1 day | | Large (9m × 12m) | 108m² | 1.7T or 3.5T | 1–2 days | | Extra large (12m × 18m+) | 216m²+ | 3.5T | 2–3 days | ### Council Requirements for Shed Slabs in NSW Sheds over 20 square metres typically require a development application (DA) or complying development certificate (CDC) in NSW. Check with your local council before starting work. Call BuildHire on 1300 157 882 to discuss your shed slab project and confirm the right machine.
Sheds over 20 square metres typically require a DA or CDC in NSW. Check with your local council before starting work.
Yes. The 1.7T mini excavator can grade a sub-base accurately using the bucket. A laser level or builder's level is essential for accurate grading.
The 3.5T is more productive for large shed slabs — its larger bucket and greater digging force reduces preparation time significantly.
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