Description
Granite Dust is finely crushed granite in a grey and white speckle. Its fine particles screed out to a smooth, even surface, and once dampened and compacted they lock together into a firm layer. That combination is what a paving or turf base needs: easy to level by hand, then solid enough not to move.
Its grey and white colour sets it apart from the tan Granite Sand, and its smooth screeding suits bedding under pavers and stepping stones or a level base under synthetic turf. Collection is from the Keilor East yard, with delivery offered at checkout to postcodes the yard covers.
Technical Specifications
| Material | Fine crushed granite |
|---|---|
| Colour | Grey and white speckle |
| Behaviour | Screeds smooth; compacts firm when dampened and tamped |
| Typical depth | 20 to 30mm as paver bedding; about 50mm compacted as a path topping |
| Sold as | Loose, by the cubic metre in quarter-m3 steps |
| Availability | Keilor East yard; delivery at checkout where offered |
Coverage Rates
| Depth | 0.25 m³ | 0.5 m³ | 0.75 m³ | 1 m³ |
|---|---|---|---|---|
| 25mm (paver bedding) | about 10 m² | about 20 m² | about 30 m² | about 40 m² |
| 50mm (path topping) | about 5 m² | about 10 m² | about 15 m² | about 20 m² |
These are loose-volume figures (volume divided by depth). Allow an extra 10 to 15 percent for the settlement that comes with compacting.
Where to Use
- Bedding layer under pavers, stepping stones and paving slabs
- Level base under synthetic turf
- Compacted topping for garden paths
- Packing the joints and edges around stepping stones
How to Apply
- Prepare the base – excavate to the finished level plus the layer depth, compact the subgrade and fit edging.
- Spread and screed – screed 20 to 30mm for paver bedding with a slight fall away from buildings so rain drains off, or spread about 60mm loose for a path.
- Wet down and tamp – mist the layer with a hose, then run a plate compactor or hand tamper over it until it no longer gives underfoot.
- Lay the surface – set pavers or roll out turf on the bedding, or for a path rake the top smooth and tamp once more.
Granite Dust, Granite Sand or Stone Dust?
- Granite Dust: fine, grey and white crushed granite that screeds smooth.
- Granite Sand: a tan granitic sand, also used as a path topping.
- Stone Dust 3mm and 5mm: graded crushed rock fines for bedding and joint filling.
- All of these compact well; choose by the texture and colour you want where the surface shows.
Important Notes
- Ordered by the cubic metre in quarter steps: a quarter, half or three-quarter load is fine for smaller jobs.
- Loose stone is heavier than it looks, so confirm your trailer or ute payload (on the compliance plate) before ordering.
- Fine dust from stone and sand can contain crystalline silica, so dampen the load before spreading, don’t dry-sweep it, and wear a P2 mask if it is dusty. See Safe Work Australia for more on silica safety.
