In residential construction, ground instability beneath foundations can lead to visible and structural damage such as cracks in walls, sloping floors, or misaligned doors and windows. These symptoms often result from moisture variation, soil compaction failure, or erosion affecting the bearing strata. Traditional underpinning methods are frequently disruptive and slow. In contrast, GEOSEC offers a clean and efficient alternative: foundation base consolidation using expanding resin injections, executed in just one or two days. This modern approach to resin injection for subsidence effectively restores the bearing capacity of the ground without the need for invasive works.
The SEE&SHOOT Method process begins with 25 mm diameter boreholes drilled perimetrically around the affected area. These small, precisely located perforations allow targeted injection of a high-performance polyurethane resin. Once injected, the resin expands on contact with moisture, filling voids, compacting loose soil, and improving contact between ground and foundation.
The process requires no excavation, produces no spoil, and causes no vibration, making it ideal for inhabited properties with gardens, patios, or limited access. Most interventions are completed in one or two days, with immediate reusability of the area.
Integrated Geophysical Monitoring: ERT
A distinctive and essential element of GEOSEC’s approach is the integration of Electrical Resistivity Tomography (ERT) into both the diagnostic and monitoring phases of the project.
ERT is used initially to detect subsoil anomalies such as moisture pockets, voids, or areas of weakened ground. This non-invasive geophysical imaging allows engineers to map resistivity changes across depth profiles in high resolution, guiding the design of the injection grid.
What makes ERT truly valuable is its ability to perform time-lapse monitoring—recording progressive changes in resistivity during and after the injections. As the resin expands, displaces water, and fills cavities, these improvements can be directly visualised and quantified through updated resistivity maps. This level of insight allows the interaction between resin and soil to be documented with scientific precision, offering full transparency and traceability.
Applications and Advantages
This system is particularly suited to homes built on clay-rich soils, properties near trees or drainage lines, and those affected by subsidence or post-flood erosion. Key benefits include:
· Minimal disruption to occupants
· No excavation or structural alterations
· Silent, vibration-free execution
· Laser-level monitoring for controlled micro-lifting
· Ground improvement validated through geophysical imaging
· ERT-documented proof of moisture reduction and void filling
GEOSECÂ combines the power of expanding resin injection with advanced ERT geophysical monitoring to deliver a rapid, non-invasive and verifiable solution to foundation instability in UK housing. This integrated approach provides homeowners, insurers and engineers with peace of mind through visible, measurable and permanent ground improvement.
