When planning a construction project, one of the hardest decisions to make is choosing the right delivery method. The choice between volumetric concrete and ready mix concrete is a common debate on UK building sites – especially for contractors and homeowners looking for the best balance of efficiency, cost control and quality.

Both options are widely used in modern construction, but they’re as different as chalk and cheese. The right choice depends on the size of your project, how tight your deadline is, and how much flexibility you need on site.

This guide should help you make sense of both systems, compares their pros and cons, and help you decide which one is best for your project – whether you’re looking for concrete delivery in Hertfordshire or overseeing a large commercial build.

What is Ready Mix Concrete?

Ready mix concrete is pre-batched concrete that’s mixed off site at a batching plant before delivery and delivered to site in a rotating drum mixer. It’s manufactured to order – a contractor phones up, orders their batch (strength, slump, additives and all) and then it gets mixed off site, chucked on a mixer truck and transported directly to site, ready to go, but once water hits cement at the plant the hydration process starts, so there’s a strict time window to pour after dispatch.

Ready mix concrete is typically produced under BSI accreditation to BS EN 206-1 and BS 8500 parts 1 and 2, which helps ensure consistent quality.

Key Features:

• Pre-batched in a factory under strict quality control

• Delivered already mixed and ready to pour

• You order a fixed volume in advance (measured in cubic metres)

• Needs precise planning and timing on site

How it works:

1. You phone up and order what you need

2. The concrete gets pre mixed off site at the factory

3. It gets delivered in a mixer truck

4. The truck arrives ready to pour at the pour site, but you’ve still got a limited time window to get it out of the truck and poured

Ready mix is the most common choice for residential and commercial construction, mainly because it’s consistent, reliable, and efficient.

What is Volumetric Concrete?

Volumetric concrete is mixed on-site using a specialist lorry – a mobile volumetric truck, one of the volumetric mixing trucks used for on-site delivery. Rather than carrying pre-mixed concrete, the volumetric truck transports raw materials, such as cement, aggregates, water and additives, stored separately in separate compartments – and then mixes them fresh on demand.

This is often referred to as on-site concrete mixing, and it allows last-minute changes unlike ready mix concrete.

Key Features:

• Mixed fresh at the point of use, highlighting the benefits of volumetric concrete with on-demand batching that stays workable for longer and can be adjusted in real time

• You can produce the exact amount needed and adapt to changing concrete requirements during delivery

• No risk of concrete setting in transit

• Ideal for variable or uncertain job requirements

A volumetric lorry concrete system lets contractors produce only the required quantity on site, improving quality control and supporting environmental sustainability through minimal waste and less waste.

Key Differences Between Volumetric and Ready Mix Concrete

Grasping the differences between the two is key when deciding which one to choose.

1. Freshness

• Volumetric: Mixed on site so its always at its freshest best

• Ready Mix: Pre-mixed and then in the back of a truck, so time is of the essence during delivery

2. Flexibility

• Volumetric: With volumetric mixers, you can adjust the volume and mix design on site in real time for a specific project

• Ready Mix: In concrete vs ready mix, you’ve got to order what you need and hope it’s right, with less flexibility once ordered

3. Waste Reduction

• Volumetric: Very low waste, supporting minimising waste and reduced waste because only the exact amount is produced

• Ready Mix: You may end up with excess concrete if you’ve ordered too much, and if project requirements change after batching, any unused concrete may need to be disposed of

4. Cost Structure

• Volumetric: The cost volumetric concrete can be more cost effective because you pay only for what you use, helping minimise waste.

• Ready Mix: You pay for what you order, regardless of how much you use, and any unused material may also create return or disposal costs.

5. Speed & Planning

• Ready Mix: Quicker to get the concrete out of the truck and poured, but needs precise timing; for large-scale continuous pours, central batching plants also benefit from economies of scale, producing massive quantities efficiently and often securing cheaper bulk material rates

• Volumetric: A bit slower but gives you more option to adapt on the fly

Which is Better for Different Project Types?

Its all about project scale and complexity.

Ready Mix is best for:

• Large slab pours (foundations, floors, driveways), especially planned high-output pours where speed matters

• Projects that need precise batch quality

• Commercial construction sites

• Jobs that have got to be done in a hurry

A trusted ready mix supplier is a strong choice when you need a consistent, high-volume pour. Ready-mix trucks usually hold about 8m³, while volumetric trucks often carry around 10m³, so project size should be weighed alongside access, flexibility, and volume certainty.

Volumetric Concrete is best for:

• Small DIY projects

• Sites where volume may change during work

• Projects with limited access or staged pours, as volumetric trucks can navigate constrained sites better and allow for phased pours

• Repair and maintenance work

• Jobs that need multiple mix designs in one delivery

• Variable jobs and larger projects

Volumetric is especially useful when you’re looking to arrange concrete delivery in Hertfordshire for an unpredictable or phased build. It can also be a better fit for bigger projects or smaller projects when demand changes during the pour.

Feature	Ready Mix Concrete	Volumetric Concrete
Freshness	Mixed before arrival	Mixed on-site
Flexibility	Low	High
Waste	Possible excess	Minimal
Cost Control	Fixed order price	Pay-as-you-use
Speed of Pour	Fast discharge	Slower production
Best For	Large, planned projects	Flexible or small projects

Factor	Volumetric Concrete	Ready Mix Concrete
Mixing Method	On-site mixing	Factory-batched
Volume Accuracy	Adjustable on delivery	Pre-ordered fixed volume
Logistics	Flexible timing	Strict delivery schedule
Material Efficiency	High (low waste)	Medium (risk of over-order)
Typical Use	Domestic, repairs, variable jobs	Large construction, structural pours

Cost, Efficiency, and Practical Considerations

From a construction efficiency point of view, both systems have pros and cons depending on how you run your project, and the operational trade-offs in volumetric concrete vs ready mix concrete come down to timing, waste and control.

Ready mix concrete gives you speed and consistency – its perfect for when you’ve got your labour teams all lined up and ready to go. However it does require accurate planning to avoid over-ordering or delays.

Volumetric on the other hand lets you produce how much concrete you need, when you need it and although it may be a bit slower its a lot more flexible and adaptable.Volumetric Concrete – a Flexible Alternative

Volumetric concrete is really where the flexibility is. It’s perfect for jobs where you just can’t quite anticipate how things are going to turn out on site – where site conditions are going to change, or where you haven’t got a clue what the volumes are going to be. This saves a tonne of waste and can really help you keep costs under control on smaller jobs, though quality control depends heavily on the operator correctly calibrating the aggregate gates and water flow. That practical difference is a key part of concrete vs ready decisions on live sites.

When it comes to concrete delivery in Hertfordshire, both options are widely available and a lot of suppliers with an expert team and a modern fleet will offer you both, depending on the specifics of what you need and whether volumetric concrete vs ready is the better fit for the job.

Pros and Cons Summary

Ready Mix Concrete

Pros

• Consistent quality every time

• Fast delivery and discharge – you’re not hanging around waiting for this stuff to arrive

• Ideal for large pours – there’s just no contest here

• Reliable strength control – this is where you need it most

Cons

• You’ve got to know exactly what you need, or you’re going to end up wasting cash

• Risk of waste if you overestimate – it happens to the best of us

• Once you’ve ordered it, you’re pretty much stuck with what you’ve got

Volumetric Concrete

Pros

• Get what you need, when you need it – and no more

• Zero waste material – that’s got to be a major plus

• Flexible volume changes – you can adapt as you go

• Multiple mix types in one load – this is a real time-saver

Cons

• Delivery’s going to be a bit slower than with ready mix

• You might need a bit more expertise to get it mixed and poured just right – it can be a bit more complicated

• It’s not always going to work out cheaper for big continuous pours

Frequently Asked Questions

1. What’s the main difference between volumetric and ready mix concrete?

Pretty simple really – volumetric concrete vs ready mix comes down to where it’s mixed: ready mix is pre mixed off site at a batching plant and delivered as is, while volumetric concrete is mixed on site from raw materials for more flexibility.

2. Which is cheaper: volumetric or ready mix concrete?

It really depends on the job. Ready mix can be cheaper for big, fixed-volume pours, but volumetric can really help reduce waste and costs if you’re dealing with smaller or changing jobs.

3. Is volumetric concrete a better choice for small projects?

Absolutely – it’s often perfect for DIY or small projects because you only pay for what you use and can adjust quantities on the fly.

4. Does ready mix concrete set quickly in transit?

It’s designed to stay workable on the way to site, but you’ve got to get it poured within a certain window to make sure the quality is up to scratch.

5. Can I change my order once ready mix concrete is dispatched?

Generally not – that’s why accurate planning is so important when ordering from a supplier.

Conclusion

When it comes to volumetric concrete vs ready mix concrete, it’s all about getting the right mix for your project.

Ready mix is your best bet for big, planned, high-volume pours where speed, consistency and structural performance are the priority. But in a concrete vs ready mix decision for smaller or variable jobs, volumetric concrete is often more flexible, can be more cost effective, and works well when the exact amount needed may change.

For Hertfordshire homeowners, builders and contractors, finding the right supplier can make all the difference – whether it’s precise batching or on-site mixing, the right advice on volumetric concrete vs ready can improve efficiency, reduce waste and deliver better long-term results.