Choosing between volumetric and ready-mix concrete can feel like a critical decision in your project planning. Both deliver concrete to your site, but they work in fundamentally different ways that affect cost, quality, and flexibility. Understanding the difference ensures you choose the right method rather than simply accepting whatever your supplier happens to offer.
For a quick volume estimate before you decide, use our free concrete calculator — knowing your approximate volume often makes the choice obvious.
What Is the Difference Between Volumetric and Ready-Mix Concrete?
Ready-mix concrete is batched at a plant, often miles from your site, and delivered in a drum mixer truck. Under BS EN 206 and BS 8500, the discharge clock starts from the moment water contacts the cement at the plant — best practice targets 90 minutes. In heavy traffic or on remote sites, that window can shrink before the pour has even started.
Volumetric concrete uses a mobile batching unit that carries cement, aggregates, and water in separate compartments. The mix is produced on your site, seconds before placement. There is no 90-minute discharge clock because nothing is mixed until you need it — giving you a full working window from the moment of mixing, regardless of journey time.
The 90-Minute Clock: Why It Matters on UK Sites
BS EN 206 defines concrete quality partly by freshness. Ready-mix begins its chemical hydration process the moment water meets cement at the batching plant. By the time a drum wagon has travelled 20–30 miles, queued at a busy site, and begun discharging, 45–75 minutes may have elapsed. In hot weather, or if there is an unexpected site delay, the mix stiffens, workability drops, and the risk of a cold joint or compromised finish increases.
Volumetric trucks carry raw, dry materials. The mixing happens at the chute, on your site, on demand. A slump test can be run immediately before placement to confirm workability meets the specification. This on-site batching approach means the concrete entering your formwork is always fresh, regardless of how long the truck spent on the road.
How Do You Pay for Each Type of Concrete?
Ready-mix: You order a predetermined volume and pay for that entire amount, whether you use it all or not. Miscalculate your requirements and you either pay for waste or face delays ordering a top-up load. Most suppliers also apply a part-load surcharge — typically £100–£200 — for orders below 3–4m³, because the drum wagon runs partially empty.
Volumetric: You pay only for what you actually pour. This pay-for-what-you-use model eliminates waste costs, removes financial pressure from precise volume calculation, and means there is no minimum order charge. It is the main reason volumetric is the preferred choice for most UK residential and smaller commercial projects.
Which Concrete Is Fresher — and Does It Matter?
Freshness matters for both workability and long-term strength. Ready-mix may be 30–90 minutes old when it arrives at your site — in hot weather, or if there is a site delay, this eats into your pour window significantly.
Volumetric concrete is mixed seconds before placement. This ensures maximum workability, better surface finish, and optimal strength development. For domestic concrete projects like driveways and patios where you are working without a large crew, this extended working window makes a real practical difference.
On-Site Mix Design Flexibility
Ready-mix is fixed at the plant — what you ordered is what arrives, regardless of changing conditions. If you need a slightly wetter mix for detailed formwork, or a stronger grade for an unexpected load requirement, you are stuck.
Volumetric allows on-site adjustment. The operator can modify water content, admixtures, and strength characteristics as conditions demand. This is particularly valuable for commercial concrete pours where different areas of the same project may need different mix designs — a single volumetric truck can produce C20 for mass fill and C35 for a structural column in the same visit.
Night and Weekend Supply
For motorway lane closures, rail possessions, or time-sensitive commercial pours that must happen outside normal hours, volumetric supply offers a clear advantage. There is no batching plant to staff outside business hours — the truck carries everything it needs. Procon 24/7 operates around the clock, making our out-of-hours concrete supply practical for night and weekend pours across Yorkshire and the North West.
Which Type of Concrete Is Right for Your Project?
Choose ready-mix for:
- Very large projects requiring 20m³+ of identical concrete
- Continuous pours where speed of placement is critical
- Projects with precisely calculated, well-confirmed volumes
- Situations where multiple trucks delivering simultaneously maximises efficiency
Choose volumetric for:
- Small to medium projects (most residential and light commercial work)
- Jobs where exact quantities are uncertain or difficult to calculate
- Projects requiring different concrete grades or on-site mix adjustments
- Sites with access restrictions that complicate multiple delivery coordination
- Night, weekend, or out-of-hours pours requiring a 24/7 supplier
- Any situation where freshness and quality take priority over sheer volume
For hard-to-access locations, combine either delivery method with our concrete line pump or boom pump to place concrete precisely where it is needed regardless of site constraints.
Procon 24/7 covers Yorkshire and the North West with same-day delivery on both volumetric and ready-mix. Call us to discuss which method suits your project.
Frequently Asked Questions: Volumetric vs Ready-Mix Concrete
Can I order very small amounts of volumetric concrete?
Yes — volumetric has no practical minimum order restriction. You can order as little as 0.5 cubic metres cost-effectively, making it viable for small repairs or garden projects where ready-mix minimums would create expensive waste.
Is ready-mix cheaper for large jobs?
For very large projects (20m³+), ready-mix can offer a slightly lower per-cubic-metre material cost. However, factor in potential waste, scheduling inflexibility, and quality risks from extended mixing times. Total project cost often still favours volumetric.
How fresh is volumetric concrete compared to ready-mix?
Volumetric is mixed within seconds of pouring. Ready-mix may be 30–90 minutes old upon arrival, depending on batching plant distance and site conditions. This freshness difference translates to better workability and superior long-term strength development.
Does Procon 24/7 supply both ready-mix and volumetric?
Yes. We supply both ready-mix concrete and volumetric concrete across Yorkshire and the North West, with same-day delivery available. Our team will recommend the right method for your specific project, volume, and site conditions.
Which is better for a domestic driveway — volumetric or ready-mix?
For most domestic driveways, volumetric is the better choice — fresher mix, no waste, and full flexibility on quantities. Ready-mix suits larger driveways where access is good and the exact volume has been confirmed in advance.
What is the 90-minute discharge rule and does it apply to volumetric concrete?
Under BS EN 206 and BS 8500, ready-mix concrete should be discharged within 90 minutes of the water being introduced to the mix at the batching plant. In traffic or on remote sites, this window can be eaten up before the pour begins. Volumetric concrete carries dry materials and mixes on-site, so there is no discharge clock — you retain a full working window regardless of journey time.
Does ready-mix require a minimum order quantity?
Most ready-mix suppliers set a practical minimum of 3–6m³ per load, with a short-load surcharge — typically £100–£200 — for orders below this threshold. Volumetric concrete has no minimum order; you pay for exactly what you pour.
Can Procon 24/7 supply concrete outside normal working hours?
Yes. Procon 24/7 operates around the clock, including nights and weekends. This makes volumetric supply particularly practical for highway lane closures, rail possessions, and other time-critical pours that must happen outside peak hours. See our out-of-hours concrete service for details.
