A radon-tight sump basin is a sealed sump pit system designed to help prevent radon gas from entering the home through the sump pit opening.

Radon is a natural gas found in the soil. An unsealed sump pit can become a major entry point for radon, especially when it is connected to the foundation drain beneath the concrete slab. Health Canada recommends using sealed systems to limit gas infiltration.

Codes and recommendations related to radon protection generally require that a sump pit be airtight in order to reduce the infiltration of underground gases into the building.

A standard sump pit is primarily designed for water management. A radon-tight sump pit adds protection against gas infiltration through an airtight lid, sealed fittings, and better compatibility with radon mitigation systems.

Yes. Radon-tight basins are often compatible with and complementary to passive or active soil depressurization systems used to reduce radon concentration in buildings.

Installing an airtight sump pit during construction helps facilitate compliance with new construction practices; limit future risks related to radon; avoid costly corrective work; and prepare the building for a future mitigation system if needed.

Yes. In several cases, it is possible to replace an existing sump basin with a sealed model in order to improve protection against radon infiltration and the system’s airtightness.

Yes. Radon is recognized as the leading cause of lung cancer after smoking in Canada. It is invisible, odorless, and can accumulate in basements and poorly ventilated spaces.

Yes. In addition to limiting the infiltration of underground gases, a sealed basin helps reduce odors, humidity, and air infiltration coming from the drainage system.