The existing rubble foundation is being exposed by careful excavation near the existing building foundation wall. Prior to excavation, accurate measurements from inside the neighbors cellar determined the approximate wall depth relative to the new finished cellar floor elevation. Rather than underpin the existing foundation, which can get costly, we decided to step up our cellar floor elevation at the existing wall so as to avoid any chance of possible movement of the existing structure. Therefore most of the cellar floor in the new building is about one foot lower than the floor immediately adjacent to the existing foundation wall to remain.
Excavation around the entire perimeter continues while lagging is installed between each adjacent soldier pile.