What does underpinning provide for existing buildings?

Underpinning is a method used to strengthen and stabilize the foundation of an existing building, particularly when the original foundation is no longer adequate to support the structure due to various reasons such as changes in soil conditions, increased loads, or construction of nearby structures. By providing permanent support at a lower foundation level, underpinning effectively transfers the load of the building deeper into more stable soil layers, ensuring that the structure remains secure and less susceptible to settlement or other structural issues.

This approach not only enhances the overall stability and longevity of the building but also accommodates any modifications or additions that might require additional support. While underpinning may indirectly contribute to increased load capacity, its primary purpose revolves around creating a solid, lasting foundation that mitigates risks associated with foundational inadequacies. This foundational work does not focus on aesthetic aspects or temporary solutions, as those would not address the core structural integrity challenges faced by the building.