Scoria is one of the most versatile landscaping and construction materials available in New Zealand. Whether you are building a driveway, improving drainage, or creating decorative garden beds, understanding what scoria to order and how much you need saves time and money.
What Is Scoria and What Is It Used For?
Scoria is a lightweight volcanic rock found throughout New Zealand. It comes in red and black varieties and is prized for its drainage properties and natural appearance.
If you are planning a broader landscaping project, check out our guide to landscaping supplies delivery in Auckland.
Common uses for scoria in Auckland include:
- Drainage - Scoria’s porous structure makes it ideal for French drains, soak pits, and retaining wall back-fill
- Driveways and paths - Compacted scoria creates a stable, permeable surface that handles Auckland’s rain well
- Garden beds and landscaping - Decorative red or black scoria adds a natural, low-maintenance finish
- Tree surrounds - Scoria around tree bases helps with moisture retention and weed suppression
- Retaining wall backfill - Its drainage properties prevent hydrostatic pressure behind walls
How to Calculate How Much Scoria You Need
Calculating the right volume prevents costly over-ordering or frustrating shortfalls. Here is a simple formula:
Length (m) x Width (m) x Depth (m) = Cubic metres needed
For example, a driveway that is 10m long, 3m wide, and needs scoria 100mm (0.1m) deep: 10 x 3 x 0.1 = 3 cubic metres
Quick reference for common depths:
- 50mm depth: 1 cubic metre covers 20 square metres
- 75mm depth: 1 cubic metre covers 13 square metres
- 100mm depth: 1 cubic metre covers 10 square metres
Always order 10% more than your calculation to account for compaction and uneven ground.
Scoria Grades: 20mm vs 40mm vs Crusher Dust
The grade you need depends on the job:
- 20mm scoria - The most common all-rounder. Ideal for garden beds, decorative use, and drainage applications. Easy to spread by hand.
- 40mm scoria - Larger chunks suited to heavy drainage applications, soak pits, and retaining wall backfill. Compacts well for driveways.
- Scoria crusher dust - Fine material that compacts tightly. Used as a base layer under pavers or as a top-dressing for paths.
Red scoria tends to be the most popular for decorative use in Auckland, while black scoria is often chosen for a more understated look.
How Much Does Scoria Delivery Cost in Auckland?
Scoria pricing in Auckland varies based on the grade, volume, and delivery distance:
- Per cubic metre (supply only): $60 - $100+ depending on grade
- Delivery fee: Typically $80 - $150 depending on distance and volume
- Bulk orders (5+ cubic metres): Often attract better per-metre pricing
The total cost for a typical residential job (3 cubic metres of 20mm red scoria delivered) usually sits between $300 and $450 in the East Auckland area.
Ordering Scoria Delivery in East Auckland From J-Tip It
We deliver scoria across East Auckland and the wider Auckland region. Our tipper truck places materials exactly where you need them on your property, saving you the hassle of wheelbarrowing from the street.
What you get with J-Tip It:
- Quality scoria sourced from trusted NZ suppliers
- Precise placement on your property (driveway, backyard, wherever you need it)
- Same-day delivery often available for East Auckland suburbs
- Transparent pricing with no hidden fees
Ready to order? View our full aggregate delivery service or get a free quote for scoria delivery. Call us on 021 189 4590.