Underpinning is when a structure's foundation is strengthened. This usually occurs by enlarging the structure's concrete foundation. The enlarged foundation not only provides more concrete to support the structure better, but it may also cover a more better suited soil. This is an area where SFT Construction has extensive experience and an area where experience really matters when creating solutions.
Buildings with foundation cracks wider than 1/4" usually require underpinning. Traditionally, underpinning was performed by digging below the current concrete foundation and pouring concrete to provide additional support. Other newer methods of underpinning involve beams and/or piles. Sometimes, reinforced concrete beams are placed below the existing foundation. Other methods involve using screw piles and brackets or piles and beams.