Underpinning

Underpinning is the process of strengthening and stabilizing the foundation of an existing building or structure. This technique is typically used when the original foundation is no longer sufficient due to soil conditions, increased load requirements, or structural damage. Underpinning involves extending the foundation depth or spreading the load over a larger area, often by inserting new supports, such as concrete piers, steel piles, or beam-and-base systems. Proper underpinning is essential for ensuring the long-term stability and safety of the structure, preventing settlement, and addressing any issues related to foundation failure. This process is commonly used in building renovations, expansions, or in response to subsidence.