AY Plumbing has designed systems for safely tunneling under the foundation of a residential/commercial building and repairing or replacing the pipes without cutting the floors. It starts with diagnosing the problem. If necessary we can use a sewer camera to inspect and locate the problem. We remove the sand from under the building and we blow rock to backfill under the foundation. During the tunneling process the property can stay occupied with little to no disturbance on the inside. We have tunneled from 5 feet under the house to 450 feet under commercial buildings. By working with engineers we have developed the best methods for soil/rock compaction and maintaining the integrity of the property.