Investigatory Services
Our investigatory services provide the reliable ground data needed to make confident, informed decisions from the very start of a project. By exploring site conditions in depth and identifying risks early, we remove uncertainty, reduce programme and cost impacts, and help project teams design and plan based on facts — not assumptions. Through a combination of different methods, we deliver clear, dependable insight into what lies beneath the surface — supporting safer designs, smoother approvals, and stronger project outcomes.
Trial holes and boreholes
Trial holes provide direct visual confirmation of ground conditions by mechanically excavating shallow pits across a site.
They allow for detailed inspection of soil strata, groundwater conditions, obstructions, and existing services, supporting early identification of constraints that could affect design, construction methodology, or programme.
Boreholes enable detailed investigation of deeper ground conditions where shallow excavation is insufficient.
By sampling soils and rock at depth, boreholes provide critical information on stratigraphy, strength, groundwater levels, and bearing capacity, informing foundation design, earthworks, and structural solutions.
They are of maximum benefit at the beginning of the detailed design phase of a project, usually post-planning.
Field and laboratory soil testing deliver accurate classification and performance data to support safe, compliant design.
In-situ testing assesses real-time ground behavior, while laboratory analysis confirms soil composition, strength, contamination, and suitability for reuse or disposal.
Undertaking soil testing in conjunction with trial holes or boreholes at the beginning of the detail design process is of significant benefit to the design of foundations and SUDs drainage systems.
Field and lab testing
Percolation & Soakage Testing
Percolation and soakage testing evaluate ground infiltration rates to inform drainage and sustainable drainage system (SuDS) design.
The results support regulatory approval and ensure drainage solutions are practical, compliant, and effective for long-term performance.
Completing this testing at the beginning of the detailed design phase is of the most benefit, enabling greater design and cost certainty as well as mitigating risk.
Offering a rapid and cost-effective method of collecting soil samples at shallow to medium depths with minimal disruption. Ideal for preliminary investigations and constrained sites, it provides reliable ground data to support early-stage design decisions and risk assessment.
Window Sampling
WAC testing
Waste Acceptance Criteria (WAC) testing determines the appropriate classification and disposal route for excavated materials. By identifying contaminants and waste types early, WAC testing helps manage environmental compliance, control disposal costs, and reduce the risk of unexpected delays during construction.
Assessing the load-bearing capacity and stiffness of soils to support pavement, roadway, and foundation design. These tests provide reliable performance data, ensuring ground conditions are suitable for proposed loads and reducing the risk of settlement or failure.
CBR & plate bearing testing
Identifying and assessing potential heritage assets beneath a site prior to development. Early investigation helps manage planning conditions, protect archaeological interests, and minimise programme risk by addressing constraints before construction begins.
Archaeological trenching
Get in touch
