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Foundations & Groundwork

Underpinning

The process of strengthening or deepening the foundations of an existing building, typically because the existing foundations are inadequate, settlement is occurring, or a new basement is being excavated adjacent to them. Traditional mass concrete underpinning involves excavating sections of ground beneath the existing footing in sequence and filling with concrete. Specialist methods include mini-piling and resin injection.

Related terms

Strip FoundationStructural Calculations
Underfloor Heating (UFH)Underpinning

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More in Foundations & Groundwork

  • Basement Conversion
  • Damp Proof Course
  • Excavation
  • Floor Slab / Ground Bearing Slab
  • Heave
  • Pad Foundation
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