20mm Byford blue metal for structural concrete, drainage runs and civil works.
The bigger brother of the 14mm, this 20mm crushed granite comes out of the Byford quarry and is the workhorse aggregate for structural concrete. It also handles drainage trenches and civil work.
It also does the heavy lifting in drainage trenches, hardstand blinding and general civil work. Bigger stone means more voids, so it drains faster than the finer grades.
| Grading | 20mm nominal, single size |
|---|---|
| Material | Crushed granite (blue metal) |
| Colour | Blue grey |
| Drainage | Free draining, open voids |
| Source | Byford quarry, supplied to order |
| Approx. density | 1.65 tonnes per m³ loose |
| Coverage | About 6.1 m² per tonne at 100mm depth |
| Supplied | Quarry Direct, sourced from trusted WA quarries and pits |
| Delivery | Perth metro on our own fleet, or pick up from Hope Valley |
Density here is our best estimate, not a weighed figure. Ring the yard if it matters for your job.
Sold by the cubic metre or tonne, delivered and tipped by our own fleet, or picked up from Hope Valley. Supplied to order from Byford, so tell us your tonnage and we'll confirm quarry stock and a delivery date. Ask about pickup times if you'd rather collect it yourself from the yard.
Not sure how much you need? The volume calculator works out cubic metres and tonnes from your measurements and drops the result straight into a quote request. At 100mm deep, one tonne of blue metal aggregate (20mm) covers about 6.1 square metres.
Delivered regularly into Jandakot, Banjup and Treeby, Kwinana and Canning Vale. See all delivery areas.
Request a quote for Blue Metal Aggregate (20mm) Work out quantities
It weighs around 1.65 tonnes per cubic metre. A trench 0.4 metres wide, 0.5 metres deep and 10 metres long needs about 2 cubic metres, roughly 3.3 tonnes. Use our calculator for your own trench.
Allow around 1 to 1.5 cubic metres for a standard soakwell depending on pit size, so roughly 1.7 to 2.5 tonnes.
The bigger stone means more voids, so it drains faster than the finer 14mm grade, and it's the workhorse size for structural concrete.
The Byford quarry, supplied to order and delivered on our own trucks.
Yes, they do a similar job moving water through open voids. Ask us which is the better fit, and the better value, for your tonnage.
Yes, it handles structural concrete, drainage trenches, soakwells, civil and subdivision works, and hardstand blinding layers.
A blue grey, the natural colour of crushed Byford granite.
Not as a standard product line at this stage. For a bulka bag order of around 25 or more, get in touch and we'll see what we can do.
No fixed minimum on blue metal. The 12 tonne minimum covers the gravels, quartz and basalt.
It's supplied to order from Byford, so tell us your tonnage and we will confirm quarry stock and a delivery date.
Laterite road gravel, also spelt ferricrete. Nominal 12mm, binds down hard for drives and tracks.
View Ferrocrete (12mm) »14mm crushed granite blue metal from Byford. Concrete mixes, soakwells and drainage.
View Blue Metal Aggregate (14mm) »14mm crushed basalt. Dense dark stone for concrete and exposed aggregate finishes.
View Basalt (14mm) »20mm crushed basalt. The heavy grade for structural concrete and hard-wearing drainage.
View Basalt (20mm) »Fine granite crusher dust (-2mm). Compacts hard as a base for turf, pavers and tanks.
View Quarry Dust (-2mm) »60mm crushed rock ballast. Big angular stone for drainage blankets and soakage pits.
View Ballast (60mm) »Send a quote request and we will come back with a firm delivered price, or call the yard.