Subsidence caused by a leaking drain

How do you recognise it?

• Cracks or subsidence in one place, often where a drain runs
• A sunken floor or a void under a concrete slab
• A manhole cover, terrace or driveway sinking locally
• A smell, damp or subsidence around an inspection chamber

First have the drains checked

Have the sewer and rainwater drains inspected by camera before any repair. A leak is often the cause of the subsidence. If it is not fixed, the problem comes back.

Then the ground and the foundation

• Voids under a floor are filled with expanding resin and the floor is lifted back to level (Slab Lift)
• Washed-out or loose ground under a foundation is strengthened with Deep Lift
• If the settlement is large or bearing ground lies deep, Magnum Push Piers carry the foundation down to firm ground

With serious damage, have a structural engineer assess the situation. Soiltek is a specialist contractor: we record, measure, propose a technique and carry out the repair, in consultation with your engineer.