The heavy single-size, 20mm screenings for structural concrete, soak wells and drainage that moves serious water.
20mm is the big single-size: the standard coarse aggregate for structural concrete and the material of choice where drainage needs maximum void space, soak wells, infiltration trenches, gabion fill and heavy subsoil drains.
Clean, washed and consistently cubic from quality basalt sources, it locks together well enough to place and stays open enough to drain for decades. By the tonne or the truckload.
| Material type | Single-sized aggregate screening |
|---|---|
| Nominal size | 20mm |
| Source rock | Quality basalt |
| Processing | Washed and dust-extracted |
| Typical loose density | ~1.4 to 1.6 t/m³ (indicative) |
| Common uses | Structural concrete, drainage, soak wells |
Figures shown are indicative typical properties and vary by source; details for your delivery are available on request.
Full loads to open sites, sized to your access and the day's program.
Maximised payload where site access and mass limits allow it.
Every load GPS-tracked from the weighbridge to your gate, with the tonnes on the docket.
Dust-extracted and consistently graded for concrete, drainage and sealing.
As a guide, this material weighs around 1.5 tonnes per cubic metre. Multiply your area by the layer depth to get the volume, then by the density. Tell us the area and depth on the quote form and we will convert it to tonnes and price the delivery for you.
100 m² at 100 mm deep = 10 m³ × ~1.5 t/m³
Tell us the volume, the site and the program. Every load is tracked live through NXT Control, from quarry to your gate.