Slab and floor level monitoring

Slab and floor level monitoring is the process of measuring vertical movement within internal floors or ground-bearing slabs over a defined period. Unlike external wall monitoring, slab monitoring focuses on the performance of the structure that is in direct contact with the ground, which is often where movement first occurs.

Movement may be caused by:

• Clay heave following tree removal
• Shrink–swell behaviour in cohesive soils
• Consolidation or settlement of underlying ground
• Moisture changes beneath slabs
• Ground improvement or repair works

Because slab movement can be slow, uneven or cyclical, single surveys or visual inspections rarely provide sufficient insight. Continuous monitoring allows trends to be identified with confidence.

Internal slab movement can cause:

• Uneven or sloping floors
• Cracking to finishes and partitions
• Operational issues in commercial or industrial buildings
• Concern following subsidence or heave investigations

In many cases, it is critical to understand whether slab movement is ongoing, stabilising or complete before intrusive or costly repairs are considered. Floor level monitoring provides the evidence required to support informed decisions.

Slab monitoring helps to:

• Distinguish heave from settlement
• Identify differential movement across a floor area
• Monitor seasonal behaviour
• Avoid unnecessary or premature remediation

Our monitoring system combines professionally installed sensors with automated data collection, providing clear insight into slab behaviour without repeated site visits.

The monitoring process:

1. Assessment and scope definition to identify monitoring locations
2. Installation of floor-level sensors with minimal disruption
3. Automated data capture, typically recorded daily
4. Secure online dashboard displaying movement trends
5. Reporting support for engineering and insurance purposes

Monitoring durations typically range from 3 months to 12+ months, depending on the nature of the issue and project requirements.

Slab and floor level monitoring is commonly used for:

• Residential properties with uneven or cracking floors
• Properties affected by tree-related heave or settlement
• Monitoring after tree removal or vegetation management
• Commercial and industrial floors where tolerance is critical
• Post-repair verification following ground improvement

The data produced provides a clear record of how the slab responds over time, supporting confident conclusions.

Compared with traditional level surveys, continuous slab monitoring provides significant advantages.

Key benefits include:

• High-frequency measurements rather than periodic checks
• Sub-millimetre accuracy and consistency
• Reduced disruption and fewer site visits
• Early identification of accelerating movement
• Clear, visual data suitable for technical reporting

By capturing data continuously, monitoring helps reduce uncertainty and supports evidence-based decision-making.

Slab and floor level monitoring is frequently required as part of subsidence investigations, insurance claims or engineering assessments, particularly where internal movement is suspected or disputed.

Our monitoring solutions support:

• Investigation of slab behaviour during claim periods
• Correlation with external movement or crack monitoring
• Verification of stabilisation prior to claim closure
• Post-repair performance assessment

When you appoint us for slab and floor level monitoring, you receive:

• Professionally installed floor-level sensors
• Continuous, automated movement measurement
• Secure online access to monitoring data
• Clear graphical outputs and summaries
• Support for engineering and insurance reporting

All data is presented in a format suitable for technical review and professional use.