Plastic tubes with wire meshing are being cut and joined to the length required for imbedding into the stone walls. The plastic tubes span the depth of both the interior and exterior walls.
Holes are bored by drilling on the stone walls. These holes are spaced 2.5 feet apart in all directions.
The plastic tubes are then placed in each hole on the stone walls then injected with epoxy. After which a steel rod is drilled into these plastic tubes which pushes the epoxy to fill in areas that are hollow in the stone wall.
The steel rod “grid” now “binds” the interior wall to the exterior wall.