What is Screw Pile Underpinning?
Screw pile underpinning is a foundation strengthening technique that uses helical steel piles to transfer structural loads deeper into stable ground. The piles are mechanically screwed into the soil to provide additional support beneath or alongside existing foundations.
This method can be used to stabilise buildings affected by subsidence, settlement or changing structural loads. It offers a controlled and efficient alternative to more disruptive traditional underpinning methods.
When is Screw Pile Underpinning Required?
Subsidence or settlement affecting an existing building
Cracked walls or floors caused by foundation movement
Building extensions that require additional foundation support
Structural alterations that change how loads are transferred
Restricted access sites where traditional underpinning is difficult
Why Use Screw Piles
for Underpinning?
Their compact installation equipment allows piles to be installed in restricted-access areas, including locations where larger piling equipment cannot operate. Installation is generally quick and controlled, with the piles transferring loads into more suitable ground strata.
This makes screw piling particularly useful for underpinning existing residential and commercial structures in London.
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