Blue metal is one of the most versatile materials we supply at Elite Sand & Soil — used for everything from concrete and drainage to driveways and decorative finishes. The main decision is which size you need: 10mm or 20mm. Here’s a quick guide.
What is blue metal?
Blue metal is a natural basalt aggregate — a clean, hard-wearing crushed stone. We supply it in two main sizes, 10mm and 20mm, along with more economical recycled alternatives.
10mm Blue Metal
Our 10mm Blue Metal is a natural basalt aggregate commonly used in concrete mixes, drainage trenches and pipe bedding. It’s ideal for:
- Agg drains and backfill
- Concrete blends
- Landscaping and decorative features
Clean, durable and versatile — in bulk or bagged form.
20mm Blue Metal
Our 20mm Blue Metal is a coarse, natural basalt stone for heavier drainage work that performs well under load. It’s suited for:
- Agg drains and soakage pits
- Retaining wall backfill and soak wells
- Road shoulders and rural driveways
- Civil site drainage
Which size should I use?
- Choose 10mm for concrete blends, pipe bedding, finer drainage and decorative work.
- Choose 20mm for heavier drainage, soak wells, retaining-wall backfill and rural driveways.
A more economical option: recycled aggregate
Where budget matters and the application allows, our recycled aggregates (10mm, 20mm and 40–70mm) are a cost-effective alternative for drainage and fill. For compacted bases, see our DGB20 road base.
How it’s sold & delivered
Available in 20kg bags or 1-tonne bulka bags, or loose. Loose pickup from 250kg; loose delivery from 500kg, 6 days a week. Call 1300 935 483 for a delivered price.
Order or ask our team
Not sure which size suits your job? Our team can help. Call 1300 935 483 for a delivered price, or browse 10mm and 20mm Blue Metal in our store.
Frequently Asked Questions
What's the difference between 10mm and 20mm blue metal?
10mm blue metal is used for concrete mixes, pipe bedding and finer drainage; 20mm is a coarser stone for heavier drainage, soak wells, retaining-wall backfill and rural driveways.
Is blue metal good for drainage?
Yes. Blue metal is a clean, hard-wearing natural basalt aggregate widely used for agg drains, soakage pits and civil site drainage.
How is blue metal sold and delivered?
Available in 20kg bags or 1-tonne bulka bags, or loose. Loose pickup from 250kg; loose delivery from 500kg, 6 days a week. Call 1300 935 483 for a delivered price.