Across London’s construction and refurbishment market, one of the most consistent risks is not visible on drawings, it sits within existing structures, hidden behind finishes, undocumented modifications and ageing materials. Structural investigation and testing has therefore become a critical step in reducing uncertainty before design decisions are made.
Swantest, led operationally by Mihai Chelmus and Liam Dixon, delivers a comprehensive range of investigation and testing services across London and the wider UK. The focus is not just on collecting data, but on translating site evidence into clear, defensible information that designers, contractors and asset owners can rely on.
Investigation Strategy: Understanding Existing Structures Before Design
Structural investigations at Swantest are built around a simple principle: understanding the existing structural form, condition and behaviour before intervention. This is particularly important on refurbishment, change-of-use and high-risk building projects, where assumptions can lead to costly redesign or programme delays.
Each investigation is scoped in collaboration with designers and contractors to define the appropriate level of testing. The objective is to minimise disruption to live environments while still generating meaningful, decision-grade results.
Surveys, Scanning and Intrusive Investigation
A combination of non-intrusive and intrusive techniques is used to capture accurate information about existing construction. Non-intrusive methods include drone-based dimensional surveys, Ground Penetrating Radar (GPR), and ferro scanning to identify reinforcement layouts and embedded steel sections.
These techniques allow teams to build a reliable picture of structural configuration without immediate disruption. Where required, intrusive investigations are undertaken, including core drilling, cold cutting and material sampling. Laboratory testing then establishes material strength, composition and deterioration mechanisms.
Corrosion Assessment and Post-Tensioned Structures
Understanding deterioration is as important as understanding geometry. Swantest carries out corrosion assessments to identify root causes rather than symptoms, allowing remediation strategies to be properly targeted.
For post-tensioned structures, the approach is highly controlled. Tendons are located using ferro scanning, GPR and ultrasonic testing, then carefully exposed to assess condition and pre-stress levels. This provides critical insight into any reduction in structural capacity, particularly on ageing assets or buildings undergoing repurposing.
Structural and Geotechnical Testing
Testing moves beyond identification into verification. Swantest delivers structural testing to confirm how elements perform in practice, including floor load capacity testing, beam testing, balcony and balustrade verification, and anchor and fixing testing.
Geotechnical testing and ground investigation further support foundation and substructure decisions. Together, these testing regimes provide real-world performance data, reducing reliance on assumptions and enabling confident design progression.
Defined Scope of Services
Swantest’s investigation and testing capability typically includes drone-based dimensional surveys, non-intrusive scanning (GPR, rebar detection and steel identification), corrosion assessment and root cause analysis, intrusive investigations with material sampling and laboratory testing, post-tensioned structure assessment, structural load testing, and geotechnical investigation.
Why It Matters for London Projects
London’s construction pipeline is increasingly dominated by refurbishment, retrofit and complex redevelopment schemes. In this environment, structural uncertainty is one of the biggest commercial and programme risks.
Data-led investigation reduces that risk. It allows project teams to move from assumption-based design to evidence-based decision-making, improving safety, reducing contingency costs and avoiding late-stage redesign.
Getting a Structural Investigation Quote
For contractors, consultants and asset owners looking to define investigation scope or obtain testing support, Swantest provides project-specific advice and quotation based on site constraints and objectives.
More information and direct enquiry can be made via: Structural Investigation Services London – Request a Quote
While structural investigation is often treated as a preliminary exercise, evidence shows that combining non-intrusive scanning with targeted intrusive testing and real-world load verification significantly reduces design risk and improves delivery certainty on complex London projects.