How to Order Concrete for the First Time: Sydney Guide 2026
Ordering ready-mix concrete in Sydney takes 7 steps: calculate your volume, choose a grade, confirm site access, book 24–48 hours ahead, prepare your formwork, receive the truck, and cure correctly. Most first-timers get it right first go.
If you've never ordered concrete before, the process can feel unclear. You're making a commitment to a truck showing up with several tonnes of material that sets in 90 minutes. This guide covers everything you need to know, in order.
According to CCAA (Cement Concrete & Aggregates Australia), over 12 million cubic metres of ready-mix concrete is poured in Australia every year. For most residential projects in Sydney, a single agitator truck delivers between 1m³ and 8m³ , enough for a driveway, slab, or set of footings.
The 7-Step Process
Calculate your concrete volume
Multiply length × width × depth (all in metres) to get cubic metres. For a 4m × 3m slab at 100mm thick: 4 × 3 × 0.1 = 1.2m³. Add 10% for wastage → order 1.35m³. Round up to the nearest 0.5m³ when placing the order.
Use the MixHub calculator to get your volume, grade recommendation, and Sydney price estimate in one step.
Choose the right grade
N25 for driveways, residential slabs, and garage floors. N20 for paths, garden edging, and blinding. N32 for structural footings, pool surrounds, and any engineer-specified work. If unsure, N25 is the safe default for most projects.
See the concrete grades guide for a full breakdown with Australian Standards references.
Check site access for the truck
A standard agitator truck is approximately 2.5m wide and 9m long. It needs 3m clearance width to manoeuvre. The discharge chute reaches up to 5m from the truck. If access is restricted (side gate, upstairs slab, narrow street), you'll need a line pump ($550–800) or boom pump ($800–1,500+).
Walk your access route before booking and confirm pump requirements when you order.
Book with 24–48 hours notice
Most Sydney suppliers need 24–48 hours notice. For Saturday pours, book by Thursday afternoon, since weekend capacity fills quickly. Weekday mornings (7am–noon) give you the best pour conditions: cooler temperatures, less traffic, and more reliable truck windows.
When you book, confirm: volume, grade, delivery address, pour date and time window, whether a pump is needed, and your contact number for the driver.
Prepare your site the day before
Concrete waits for no one. Have everything done before the truck arrives. This means: excavation complete, subbase compacted, formwork set and braced, reinforcement installed (mesh or reo bar), subbase dampened, and all tools on site (screed board, bull float, edger, curing compound or plastic sheeting).
Receive the truck and pour
Be at the site and fully ready when the truck arrives. Most suppliers allow 7 minutes free unloading time per cubic metre. After that, waiting time is $2–3/minute. Direct the chute as the driver discharges. Screed immediately, working quickly across the slab.
Do not add water to the mix. It reduces strength. If the concrete is stiff, discuss with the driver before adding anything.
Cure the concrete correctly
Curing is critical. Apply a curing compound immediately after finishing, or cover with plastic sheeting weighed down at the edges. Keep the surface moist for 7 days minimum. No foot traffic for 24 hours. No vehicle traffic for 7 days. Full structural strength at 28 days.
Site Preparation Checklist
Print or screenshot this before your delivery day. Have everything ticked off before the truck arrives.
Before booking:
- Volume calculated (length × width × depth × 1.1)
- Grade confirmed (N20 / N25 / N32)
- Site access assessed: truck or pump?
- Delivery address and contact number ready
Day before delivery:
- Excavation complete, subbase level and compacted
- All formwork set, straight, and firmly braced
- Reinforcement mesh or reo bar installed and supported
- Expansion joints placed at correct intervals
- Access path for truck or pump clear and confirmed
- All tools on site: screed board, bull float, edger, trowel, broom
- Curing compound or plastic sheeting ready
- Crew organised and confirmed for pour time
On pour day:
- Subbase dampened (not soaked) 1 hour before truck arrives
- All team members on site and briefed
- Driver's contact number saved in your phone
- Delivery docket checked on arrival (grade, volume, slump)
What to Tell the Supplier When You Order
When you call or book online, have this information ready:
| Information needed | Example | Why it matters |
|---|---|---|
| Volume | 2.5m³ | Determines truck size and short-load fees |
| Grade | N25 | Mix design and pricing |
| Slump | 80mm (standard residential) | Workability. Leave at default unless engineer specifies otherwise |
| Delivery address | 14 Smith St, Blacktown | Dispatch routing and pricing |
| Pour date & time window | Wednesday 26 March, 7–9am | Schedule slot (morning fills first) |
| Access notes | "Side gate, 3m clearance, no pump needed" | Driver preparation, pump dispatch if required |
| Contact number | Your mobile | Driver calls 30 min before arrival |
Common First-Timer Mistakes to Avoid
Adding water to the mix. Concrete that feels stiff is fine. Adding water reduces strength by 5–10 MPa per extra 20L. Never do it.
- Not being ready when the truck arrives. Waiting time charges are real. Have everything done beforehand. The truck won't wait.
- Underestimating volume. Always add 10% wastage. Running short mid-pour creates cold joints (visible seams where new concrete meets set concrete). Order slightly more, not slightly less.
- Booking without confirming pump requirements. If you need a pump and haven't booked one, the truck may not be able to unload. Call ahead and confirm.
- Ordering on a hot day without planning for it. Above 32°C, concrete sets significantly faster. On hot days, book an early morning delivery and have extra crew ready. See the hot weather concreting guide.
- Skipping curing. The difference between N25 that reaches full strength and N25 that doesn't is almost always poor curing. 7 days of moisture retention costs you almost nothing.
Frequently Asked Questions
How much notice do I need to order concrete in Sydney?
What is the minimum concrete order in Sydney?
What happens if I’m not ready when the concrete truck arrives?
Can I order concrete online in Sydney?
What grade concrete should I order for a driveway?
Do I need a pump to receive a concrete delivery?
How do I measure how much concrete I need?
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