Ground Investigations in Dorset
Ground investigations are the essential first step in diagnosing and resolving subsidence affecting your Dorset property. Our investigations reveal what's happening beneath the surface — soil type, moisture content, bearing capacity, and the presence of any features that may be causing ground movement.
We carry out trial pits, boreholes, and soil sampling to build a complete picture of the ground conditions at your site. This data informs the engineering design of any remedial works and is typically required by insurers and structural engineers before approving repair schemes.
Dorset's varied geology — from Portland limestone to Kimmeridge clay and Bagshot sands — means ground conditions can change dramatically over short distances. Site-specific investigation is the only way to ensure repair solutions are properly designed.
Why Choose Us for Ground Investigations
Complete Diagnosis
Understand exactly what's causing subsidence before committing to costly repairs.
Insurer Approved
Investigation reports that meet the requirements of insurers and loss adjusters.
Informed Engineering
Data that allows engineers to design the most effective and economical repair.
Local Knowledge
Deep understanding of Dorset's varied geology and how it affects foundations.
Areas We Cover for Ground Investigations
Select your area for local information and service details.
Frequently Asked Questions
What is a ground investigation?
A ground investigation involves excavating trial pits or drilling boreholes to examine the soil beneath and around your property. Samples are tested to determine soil type, moisture content, and bearing capacity. This data reveals the cause of subsidence.
How deep are investigation boreholes?
Boreholes are typically drilled to 3-6 metres depending on the foundation depth and suspected cause of movement. Deeper investigations may be needed where piled foundations or deep-seated geological issues are involved.
Do I need a ground investigation for a subsidence claim?
Most insurers require a ground investigation to confirm subsidence and determine the cause before approving repair works. The investigation report is a key document in the claims process.
How long does a ground investigation take?
Site works typically take one to three days depending on the number of trial pits and boreholes. Laboratory testing of soil samples takes an additional one to two weeks, after which we issue our full report.
Will investigation work damage my property?
We take great care to minimise impact. Trial pits are excavated carefully and backfilled. Boreholes leave small holes that are properly sealed. Any damage to surfaces is made good as part of our work.
What soil types cause the most problems in Dorset?
Shrinkable clay soils — particularly the Kimmeridge, Oxford, and London clays found across parts of Dorset — are the most problematic. These clays shrink in dry weather and swell when wet, causing cyclical ground movement that can damage foundations.
Related Services
Foundation Stabilization
Advanced foundation stabilization techniques to halt subsidence and restore structural integrity.
Underpinning Services
Strengthen and stabilise your foundations with professional underpinning solutions tailored to Dorset properties.
Soil Stabilization & Grouting
Stabilize weak or waterlogged ground beneath your property with advanced grouting techniques.