Suction pit
To ensure an effective radon mitigation system, rock and soil must be removed at the pipe penetration point to create a properly sized suction pit. This allows the system to develop adequate airflow and pressure beneath the slab, maximizing radon reduction and long-term performance.
Rock and Soil removed
This photo shows the rock and soil removed from beneath the slab to create the suction pit for a radon mitigation system. Excavating this aggregate and sub-slab material is a critical step in forming an adequate void space, allowing the system to establish proper airflow and negative pressure under the foundation for effective radon reduction.