How does the ground subside and how can this be prevented? Soil movement and subsidence are referred to in construction as settlement. Engineers already take this phenomenon into account during the design phase of a building or structure. Settlement in the subsoil can eventually lead to subsided floors or foundations.
A subsided concrete floor occurs regularly and can cause cracks, tilting, or functional issues in a property, driveway, or paved surface. But what exactly causes this subsidence, and more importantly: how can it be prevented or solved? In this article, we explain the most common causes and how you can prevent subsidence of your concrete floor.
What causes soil settlement?
Soil settlement occurs when the ground beneath a structure compacts, shifts, or loses bearing capacity. This is a natural process that is already considered during the design phase of construction. When settlement occurs unevenly or unexpectedly, it can lead to problems such as subsided floors or foundations.
A concrete floor does not usually sink due to the concrete itself, but due to changes in the underlying soil. When the load-bearing capacity decreases, the floor may sink or become uneven. Common causes of settlement include:
- Settlement after new construction or renovation
- Insufficiently compacted sand or soil layers
- Changes in groundwater levels
- Soil erosion due to leaks or poor drainage
- Vibrations or heavy loads from traffic or machinery
These factors can cause the soil to compact or create voids beneath the floor, resulting in subsidence. During building inspections, for example before purchasing or renovating a property, these are important aspects to assess.
How do you recognize a subsided concrete floor?
A subsided concrete floor can often be identified by several clear signs:
- Cracks in the floor or along edges
- Height differences or an uneven surface
- A hollow sound when walked on
- Doors, machines, or shelving systems no longer being level
Early detection of these symptoms can limit further damage and often makes repairs easier.
How can you prevent concrete floor subsidence?
Complete prevention is not always possible, but the risk can be significantly reduced by taking certain measures:
- Ensuring proper compaction of the subsoil during construction
- Preventing leaks and ensuring proper drainage
- Carrying out inspections in time when in doubt
If subsidence has already occurred, lifting the floor using foam concrete can be an effective solution. This method fills voids and stabilizes the subsoil, bringing the floor back to the correct level. Thanks to the lightweight and strong properties of foam concrete, this is a durable solution that ensures long-term stability.
Faber Vloerliften is happy to help
Are you unsure about the condition of your floor or do you suspect subsidence? We are happy to assist you. With more than 30 years of experience in floor restoration and five locations across the Netherlands, we have extensive local knowledge of subsoils and construction types.
The foam concrete used by Faber Vloerliften is independently tested and sustainably produced. Our specialists inspect the situation on site, advise on the best approach, and carry out the repair with minimal disruption. This ensures professional and durable restoration, with attention to safety, health, and the environment.