Why Can Old Roots Cause Surface Settlement?

Trees bring long-term value to gardens and landscapes across Borrowash, Derbyshire. However, when trees are removed or decline naturally, the root systems left behind can sometimes create unexpected ground movement. One of the most common consequences is surface settlement.

Understanding why old roots contribute to this issue helps property owners make informed decisions about tree management and site preparation.

What Happens to Roots After a Tree Is Removed?

When a tree is felled, its visible structure is gone, but the root system remains underground. These roots gradually decay over time, and this natural breakdown process can affect soil stability.

Decomposition Creates Voids

As roots decompose, they lose volume. Large structural roots that once occupied significant space beneath the surface slowly break down, leaving gaps in the soil.

Over time, the soil above these voids can begin to sink or shift, especially in areas subject to weight such as:

• Lawns and landscaped areas
• Driveways and paths
• Patios and garden structures

In Borrowash, where residential gardens often contain mature trees, this issue can become noticeable several months or even years after removal.

Soil Structure and Compaction

Roots do more than anchor trees; they help bind and stabilise soil. Once those roots decay, the surrounding soil may lose cohesion.

Reduced Ground Support

Without the structural network of roots, soil can become less stable. If heavy rainfall or normal ground pressure occurs, the weakened soil may compress further, resulting in visible settlement.

Changes in Moisture Levels

Large trees absorb significant amounts of water. After removal, the soil’s moisture balance can change. In some cases, increased moisture combined with decaying roots can accelerate ground movement.

Surface Signs of Settlement

Surface settlement caused by old roots may appear gradually. Common signs include:

• Depressions forming in lawns
• Uneven paving
• Cracks in patios or pathways
• Soft patches in previously firm ground

These symptoms do not always appear immediately. The decomposition process is gradual, which means settlement can occur long after the tree itself has been removed.

Preventing Long-Term Ground Issues

The most effective way to reduce the risk of surface settlement is to manage root systems properly at the time of tree removal.

Stump Grinding and Root Management

Stump grinding removes the visible stump and reduces the size of the remaining root mass. While some deeper roots will still decay naturally, grinding significantly reduces the volume of material left underground.

Professional Assessment Before Landscaping

If new structures such as driveways or patios are planned, assessing previous root locations is important. Preparing the ground properly helps prevent future movement.

At Borrowash Tree Surgeons, careful evaluation of root systems ensures that tree removal in Borrowash is handled responsibly, minimising the likelihood of later surface settlement.

When to Seek Professional Advice

If you notice uneven ground or subsidence in areas where a tree once stood, it is advisable to seek professional guidance. Identifying the cause early allows appropriate corrective measures to be taken before further movement occurs.

Experienced tree surgeons can assess whether residual root decay is contributing to the issue and recommend suitable next steps.

Conclusion

Old roots can cause surface settlement because their gradual decomposition leaves voids beneath the soil, reducing ground stability and altering moisture balance. Without proper management, this can lead to uneven lawns, shifting paving and long-term landscaping concerns.

For property owners in Borrowash, Derbyshire, proactive root management during tree removal is essential to maintaining stable and level ground. Borrowash Tree Surgeons provides professional tree care and site assessment to help ensure your outdoor space remains safe, secure and structurally sound for years to come.

Call us on: 01332 215 097
Click here to find out more about Borrowash Tree Surgeons
Click here to complete our contact form and see how we can help with your trees needs.