Structural investigation across the UK
Clear evidence for confident decisions.
JPSI provides targeted structural investigation, testing and assessment for bridges, buildings, highways and wider infrastructure—delivering reliable findings and practical recommendations.
What we do
Investigation built around the question you need answered.
From an initial condition survey to targeted testing and sampling, we shape each investigation around the structure, the available evidence and the decision that follows.
Tell us about your project →Condition surveys & steel mapping
Visual surveys, reinforcement location and concrete cover assessment to establish condition and guide targeted work.
Scanning & half-cell testing
Targeted reinforcement scanning and half-cell potential surveys to map hidden details and identify corrosion risk.
Concrete sampling & testing
Dust and core sampling, carbonation assessment and complementary test programmes designed to provide useful, representative evidence.
Non-destructive testing
Cover, half-cell potential, resistivity, ultrasonic pulse velocity and rebound hammer testing for focused condition assessment.
Specialist investigations
Half-joints, expansion joints, waterproofing, trial pits, post-tensioned and prestressed elements, bearings and beam ends.
Additional diagnostic services
Crack monitoring, fire damage surveys, endoscopic inspection, GPR, pavement investigation and DCP testing.
Buildings & structures
Understanding what is happening behind the finish.
We investigate concrete, steel and masonry within commercial, residential, civic and industrial buildings—helping clients understand condition, confirm construction details and plan proportionate repairs.
- Internal condition surveys and defect mapping
- Reinforcement location, cover and slab scanning
- Concrete sampling, coring and laboratory testing
- Targeted investigation of cracking, moisture and deterioration
Access & intrusive investigation
Capability where access is difficult.
From confined spaces and restricted service voids to work at height, we plan safe access and collect the evidence needed without losing sight of the wider engineering question.
- Diamond core sampling with controlled water and dust
- Investigation in restricted and confined locations
- Access planning coordinated around the live asset
- Clear records linking every sample and test to location
Our approach
A clear route from question to answer.
A proportionate, evidence-led process that keeps the investigation focused and the output useful.
Define
We clarify the asset, constraints, existing information and the decisions the investigation must support.
Survey
We establish visible condition and target the areas where testing will add the most value.
Test
We combine appropriate non-destructive techniques, intrusive investigation and sampling as required.
Report
We set out the findings clearly, explain their significance and provide practical recommendations.
Why JPSI
Experienced. Independent. Practical.
We combine technical capability with a responsive, personal service. Every commission is approached with care, from planning and safe access through to interpretation and reporting.
- A flexible scope shaped around your project and asset
- Focused testing that avoids unnecessary work
- Accurate records and clearly presented findings
- Practical recommendations for consultants, contractors and asset owners
- Responsive delivery across the UK
About JPSI
Bridging the gap in structural investigations.
JPSI is an independent structural investigation company supporting the people responsible for maintaining, understanding and improving the UK’s built environment.
We take pride in a personal and flexible approach, combining technical expertise with close attention to detail so each survey and report delivers trusted results and lasting value.
Evidence first
We select methods for the information they provide and the decision they need to support.
Clear communication
We keep clients informed and present findings in language that is easy to act on.
Responsive delivery
Our independent structure allows us to adapt quickly to access, programme and site constraints.
Care in the detail
From field records to final reporting, accuracy and professionalism run through the work.
Start a conversation
Need a clearer picture of your structure’s condition?
Tell us about the asset, the question and your programme. We’ll help you shape the right investigation.
At JPSI Ltd, we specialise in providing high-quality structural investigation, testing, and assessment services across the UK. Our mission is simple — to bridge the gap in structural investigations by delivering clear, reliable data that helps clients make confident decisions about their assets.
Our services
Expert consulting services tailored to your business needs, providing strategic solutions and actionable insights.
Our core services include:
• Steel mapping
• Concrete sampling – dust and core
• Visual condition surveys
• Non-destructive materials testing – cover, half-cell, resistivity, and carbonation
• Specialist half-joint and expansion joint investigation
• Waterproofing and trial pit surveys
• Post-tension and pre-stressed investigation
• Bearing and beam end inspection
• Crack monitoring
• Fire damage surveys
• Endoscopic inspection
• Ground penetrating radar (GPR) survey
• Ultrasonic pulse velocity testing – detection of voids and defects
• Surface hardness testing of concrete by rebound hammer
• Pavement investigation and DCP testing
A JPSI Service
At JPSI Ltd, we provide high-quality structural investigation services tailored to each project’s needs. Our work offers exceptional value through accurate testing, clear reporting, and fast turnaround times. Whether it’s half-cell surveys, GPR, cover meter testing, concrete sampling, or full condition assessments, every service is delivered with precision and pride.
About Our Company
As a small, independent company, we take great pride in offering a more personal and flexible approach to every project. We combine technical expertise with genuine attention to detail, ensuring that every inspection, survey, and report reflects our commitment to accuracy, integrity, and excellence.
Whether supporting consultants, contractors, or asset owners, our goal is always the same — to deliver trusted results and lasting value, while helping to ensure the safety, durability, and sustainability of the UK’s built environment.
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