Rapid and reliable CBR testing Midlands services are carried out on-site across the region. We provide the factual ground data you need to keep your development progressing without delay, ensuring your pavement plans, earthworks, and foundations are designed with confidence.
Building at the Heart of England? Don’t Get Bogged Down.
The Midlands remains one of the UK’s most active construction zones, with major logistics hubs, housing schemes, and regeneration sites emerging from Birmingham to the East Midlands. Every project starts with a clear understanding of the ground conditions, particularly the mechanical strength of the sub-grade soil beneath your proposed structure.
Failing to measure the soil’s bearing limit is a costly risk. Weak ground can result in cracked pavements, excessive settlement, and rework that significantly increases development costs. Our CBR testing services give you certainty. Each CBR test performed delivers the precise measurement and CBR values engineers need to design safer, more efficient, and more economical pavement layers.
Our Geotechnical Testing Services Across the Midlands
Construction sites move quickly, and you need testing services that deliver clarity just as fast. Our geotechnical capability is built for efficient mobilisation, minimal disruption, and accurate CBR test results you can trust.
Below is the full range of our ground investigation solutions.
In-Situ CBR (California Bearing Ratio) Testing
The California Bearing Ratio test, originally developed by the California State Highway Department and later adopted by the USA’s California Highway Department, remains the most utilised test for evaluating the strength of compacted soils and subgrade layers for civil engineering purposes.
Our in situ CBR test follows the standard test procedure in strict accordance with BS 1377-9:1990. During the test:
- A standard round cylinder penetrates the sub-level soil.
- The test records the pressure required to penetrate the ground at a controlled rate.
- This pressure is divided by the pressure required to achieve equal penetration into a standard crushed rock material.
- The ratio produces the CBR test value.
- A higher CBR value indicates stronger ground and a more efficient pavement build-up.
These CBR tests provide a reliable estimate of the soil’s bearing strength for roads, car parks, temporary works, and other street structures.
We also issue provisional results on the day of testing, enabling performance CBR tests quickly and helping engineers adjust pavement plans on fast-moving sites.
Plate Load Testing / Plate Bearing Testing
When assessing heavy plant operations, such as cranes, piling rigs, or a Four Wheel Drive vehicle traversing soft ground, you need certainty about the ultimate bearing capacity. Our plate bearing testing (also known as plate bearing or PBR test) measures:
- Ground settlement under load.
- Subgrade reaction and stiffness.
- The pressure required to achieve a specific deformation.
- The effect of reaction load during incremental loading.
A pure PBR test allows engineers to determine the load-bearing limit, acting as a complementary method alongside CBR, where larger footprints and safety-critical applications demand additional assurance.
Dynamic Cone Penetrometer (DCP) Surveys
The DCP is one of the fastest in situ tests available for assessing strength variations within a particular soil mass, especially when you need to profile ground conditions across a wide test site.
DCP surveys:
- Identify weak layers below the surface level.
- Verify compaction in granular materials and compacted soils.
- Assist in adjusting designs for reduced development costs and fewer materials.
- Help engineers produce the highest quality sub base using factual subsurface data.
They are ideal for large infrastructure and multi-plot housing schemes requiring multiple trials on the same day.
The STS Advantage in the Midlands
From Coventry to Stoke-on-Trent, engineers rely on us because we understand the region’s construction challenges and deliver accurate CBR test results supported by experienced and dedicated professionals.
Unrivalled Speed
We know time is money. That’s why we aim to return a full, easy-to-read report within 24–48 hours. Our workflows ensure performing CBR tests quickly while maintaining precision.
Extensive Midlands Coverage
We regularly work across Birmingham, Nottingham, Leicester, Derby, Wolverhampton, the M1 corridor, and surrounding areas. Diverse soil profiles across the Midlands, from clay to granular materials, are familiar territory for our team.
Straight-Talking, Professional Reporting
We present results clearly, without unnecessary jargon. Your report outlines measured pressure, soil quality, particle size, and any relevant risk factors, all explained for practical engineering use.
A Genuine Project Partner
Ground testing is just the start. We help you interpret results such as high CBR, low CBR, or inconsistent soil strength, explaining how they affect pavement build-ups, wheel loads, mechanical strength and long-term durability.
We also advise when to adjust designs by:
- Increasing sub-base thickness
- Using granular materials
- Improving your subgrade with stabilisation products
- Thinking about how to get a specific material into the right place to sort out some soft spots is an issue we see a lot.
We’re here to help you throughout the project, and we’re happy to come in and explain how the results tie into design parameters and the decisions you’re making on site.
Frequently Asked Questions (FAQs)
In simple terms, what is a CBR test for?
A CBR test measures the strength of the grade soil by comparing its resistance to penetration against a standard crushed rock material. The CBR test stands as the benchmark for pavement design across the UK. CBR values directly influence the required thickness of sub-base, ensuring long-term performance and reduced development costs.
Is CBR testing required for my project?
If your surface must withstand wheel loads, vehicle traffic, or heavy equipment, then yes. The California Bearing Ratio is a fundamental design parameter for civil engineering works, and local authorities often require CBR evidence for compliance.
How disruptive is the process?
Very little. Our team works efficiently around your operations, conducting in situ tests quickly and leaving a minimal footprint on the test site.
Which areas of the Midlands do you cover?
Everywhere. We operate across the West and East Midlands.
What if my CBR values are low?
Low results simply indicate the soil mass requires improvement or a different pavement design. Engineering solutions may include stabilisation, geotextiles, thicker layers, or switching to granular materials. With accurate CBR test results, your engineers can mitigate risk and build safely.
Start Your Midlands Project on a Solid Foundation
Remove uncertainty from your groundwork. Get the factual data you need to ensure your design is safe, compliant, and cost-effective.
Contact us today for a free, no-obligation quote for CBR testing Midlands. Let’s build it right from the ground up.
