How strong it is
Road Base 2.5 has a California Bearing Ratio (CBR) of 15. It compacts into a stable foundation for levelling, paver bases and lighter-duty areas; for heavy loads and high traffic, choose CBR45 or CBR80.
Road base · 09.03
Road Base 2.5 – CBR15
Long-lasting road base that is easy to lay and made to compact. For carparks, driveways, levelling, pavers and slab foundations.
- Type 2.5
- CBR 15
- Compactable
- Sold per m³
Quick answer
Road Base 2.5 – CBR15 has a California Bearing Ratio of 15 and is made to be compacted. It’s long-lasting, durable, easy to lay and water resistant, and it’s used for carparks, driveways, landscape levelling, pavers and concrete slab foundations. For heavier traffic, step up to CBR45 (Type 2.3) or CBR80 (Type 2.1). Spread about 100–150mm and compact it.
| Grade | Type 2.5 |
|---|---|
| CBR | 15 |
| Best for | Landscape levelling, paver bases and light-duty areas |
| Sold by | The cubic metre |
| Typical depth | About 100–150mm compacted |
| Coverage | About 7–10 m² per m³ |
| Approx. weight | About 2.0 tonnes per m³ |
These coverage and weight figures are a guide. Work out your own area with the volume calculator.
Why choose it
What it does well
- 01Long-lasting
- 02Designed for compaction
- 03Durable
- 04Easy to install
- 05Water-resistant
Good jobs for it
Where it gets used
- 01Carparks
- 02Driveways
- 03Landscape levelling
- 04Paver bases
- 05Concrete slab foundations
Compare grades
Picking the right road base grade
CBR (California Bearing Ratio) tells you how much load a compacted base can carry. A higher number means a stronger base.
| Grade | CBR | Typical use |
|---|---|---|
| Road Base 2.1 – CBR80 | 80 | Heavy-duty, high-traffic pavements and road building |
| Road Base 2.3 – CBR45 | 45 | Standard roads, driveways and parking areas |
| Road Base 2.5 – CBR15 | 15 | Landscape levelling, paver bases and light-duty areas (this product) |
Which grade suits your job
A CBR of 80 or above (such as Type 2.1) suits heavy-duty, high-traffic pavements. CBR 45 is the standard rating for ordinary roads, driveways and parking areas.
Road Base 2.5 – CBR15: your questions answered
2.1, 2.3 or 2.5 road base: what’s the difference?
The number is the grade and the CBR is its strength. 2.1 (CBR80) is for heavy-duty, high-traffic pavements, 2.3 (CBR45) for ordinary roads, driveways and parking, and 2.5 (CBR15) for levelling, paver bases and light-duty areas.
Will 2.5 road base work under pavers?
Yes. It is made to compact and gives you a firm, level base for pavers.
How many cubic metres of road base should I order?
Plan on 100–150mm compacted. At that depth, one cubic metre covers roughly 7–10 m². Order a little extra, as it compacts down.
Describe the job. We’ll work out the quantity.
Tell us what you need, how much of it and where it’s going, and we’ll reply with a price and a delivery time.