155 and 275 Notre-Dame St. E. Montreal

Foundation waterproofing

Vauquelin Square, located on the site of a former prison, was first built in 1858 (Neptune Square) and rebuilt in 1966 and 2017. Our mandate consisted in waterproofing the foundation of the city hall, the Lucien Saulnier Building and the underground tunnel connecting the two buildings.

Given the archaeological interest of the site, excavation work was carried out under the supervision of an archaeologist. At that time, the floor of the former prison was discovered and protected during the project.

  • Replanted a tree from Vauquelin Square to Jean-Paul II Park
  • Removed and stored the base of the bronze statue
  • Excavated to the footings of the foundations
  • Repointed the stone-wall foundations
  • Repaired the concrete of the tunnel
  • Installed insulation and a waterproofing membrane