Underpinning is a specialized foundation repair method used to strengthen and stabilize an existing foundation that has become weak or unstable. This process involves extending the foundation deeper into the ground or adding additional support beneath it to ensure the structure remains level and secure.
Underpinning is often used when the original foundation is not strong enough to support the building due to soil changes, increased load (like adding more floors), or poor initial construction. The most common way to underpin is by digging beneath the existing foundation and installing concrete or steel piers to provide extra support. These piers transfer the building’s weight to deeper, more stable soil layers.
This foundation repair method is ideal for homes experiencing severe settlement or structural movement. It can also be used to fix large cracks, sinking areas, or uneven floors. Although more complex and time-consuming than other repair techniques, underpinning provides a long-term solution to serious foundation issues. A professional inspection can determine if underpinning is the right choice for your property’s needs.