Most subsidence issues in the UK are created by unstable ground, often caused by extreme weather conditions such as hot, dry summers and heavy rainfall or flooding. Other factors such as leaking pipes, vegetation with invasive roots, loosely packed soils or old landfill sites, excavation work and inferior concrete foundations can also be sources of subsidence.
Common signs of subsidence around your home are:
- Cracks in walls larger than 5mm
- Sinking or sloping floors
- Doors and windows that won’t close
Minor cracks alone may not necessarily be a cause for concern, but larger cracks can be a sign of something more serious and should not be ignored. Cracks which are wider than 5mm, or zigzag/stepped cracks in brickwork which usually follow the mortar lines, are indicators of possible structural problems.
While the anticipated cost to arrest subsidence and rectify foundation damage may seem prohibitive, if the signs are ignored, costs will increase over time as the situation worsens and not addressing the issue could even devalue the property. The two most popular methods of resolving foundation subsidence issues are traditional concrete underpinning and modern resin injection. Both are proven methods, yet involve very different procedures.