On the surface, they sound similar. Both arrive on site ready to use. Both are widely used for domestic and commercial projects. But how they’re produced and delivered can make a big difference to cost, waste, timing and flexibility.
Here’s a clear breakdown to help you decide which one is right for your job.
What is ready mix concrete?
Ready mix concrete is batched in a plant under controlled conditions and delivered to site in a drum mixer truck.
It arrives already mixed to the specified strength and has a fixed consistency from the moment it leaves the plant.
Typical uses:
- House foundations
- Driveways and patios
- Floor slabs
- General domestic construction
- Smaller commercial jobs
Ready mix is ideal when your project is well planned, access is straightforward, and you know exactly how much concrete you need.
What is volumetric concrete?
Volumetric concrete is mixed on site using a specialist volumetric lorry. The raw materials, including aggregate supply, cement and water, are carried separately and mixed fresh as needed.
This means the mix can be adjusted on site if required. Once mixed, the concrete is provided as part of a full concrete delivery service, so it goes straight from the lorry to where you need it.
Typical uses:
- Large or phased pours
- Projects with uncertain quantities
- Sites with changing conditions
- Domestic and commercial builds
- Jobs requiring multiple mix types
Key characteristics:
- Mixed on site, not in a plant
- Exact quantity produced as needed
- Mix can be adjusted during the pour
- No risk of wasted concrete
Volumetric concrete is particularly useful when job requirements are likely to change, or when accuracy and flexibility matter.
Volumetric vs ready mix: key differences
The main difference comes down to where the mixing happens and how much control you have once the lorry arrives. Ready mix is made off site to an exact recipe, while volumetric concrete is made on site, so it can be changed on the spot.
Which is better for small domestic projects?
For smaller, straightforward jobs like patios, shed bases or driveways, ready mix concrete is often the most cost-effective option.
It works well when:
- You know the exact quantity needed
- Site access is simple
- The pour can be completed quickly
However, if there’s any uncertainty about measurements or timing, volumetric concrete can help reduce stress and avoid waste.
Which is better for larger or complex projects?
Volumetric concrete tends to be the better choice for larger or more complex projects.
It’s especially useful when:
- Multiple pours are needed over time
- Site conditions may change
- You want to avoid over-ordering
- Different concrete grades are required on the same site
Because the concrete is mixed on demand, you only pay for what you use.
Quality and consistency
Both volumetric and ready mix concrete can achieve the same strength grades, including C25, C30 and C40. Building regulations set out the standards that foundations and concrete work need to meet, and the Planning Portal’s guidance on foundations explains why getting this right matters for any build.
The difference is not quality, but control:
- Ready mix offers factory-controlled consistency
- Volumetric offers on-site adjustment and flexibility
In experienced hands, both deliver high-quality results.
When volumetric concrete is the better choice
Volumetric concrete is often the better option when:
- You need flexibility on site
- Quantities are uncertain
- You want to avoid waste
- Multiple mix types are required
- The project is large or phased
It gives you more control during the pour itself.
There’s no one size fits all answer. Ready mix concrete works best for simple, predictable jobs where everything is planned in advance. Volumetric concrete is better suited to projects where flexibility, accuracy and waste reduction matter more.
The right choice usually comes down to how complex your project is, and how confident you are in your measurements before the first pour. If you’re unsure, volumetric concrete often provides a safer margin of control, especially on larger or evolving sites.
