Underpinning a Foundation

  • The Contractor excavated for an addition with a basement
  • Part of the house only had a 3’ deep foundation wall
  • The foundation wall needs to be extended deeper for the addition
  • To accomplish this, it must be done in sections so the house does not collapse
  • We excavated 4’, then skipped 8’, then excavated 4’, and so on
  • Then we installed rebar, formed and poured the concrete in the excavated sections
  • A few days later, we excavated another 4’ and did the same
  • After three concrete pours, the underpinning was complete
  • The house is fully supported and the addition can be built
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