
Active Radon Reduction Systems
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Sub-slab depressurization is a common radon mitigation approach for homes with concrete slab areas. The basic goal is to create lower pressure beneath the slab so radon-bearing soil gas is drawn into a controlled piping system rather than entering occupied areas of the house.
The details matter. Slab layout, foundation walls, additions, soil conditions, existing openings, and possible pipe and fan locations can affect system planning. We evaluate the York County property before determining the appropriate configuration.

A properly planned system establishes suction beneath the concrete slab and uses a continuously operating fan to move collected soil gas through dedicated piping to an appropriate exterior discharge point. System design depends on the home's actual foundation.
Suction locations are selected according to the slab and foundation configuration so pressure can be established beneath the appropriate area.
Dedicated piping carries soil gas from beneath the slab through the mitigation system.
The fan provides continuous suction for an active system and is selected as part of the overall system design.
The piping route and discharge location are considered as part of a complete installation.
Post-mitigation testing measures radon after the system is operating and provides the information needed to evaluate performance.
| Service | Estimated Cost | Average |
|---|---|---|
| Single-foundation system | Varies by property | Site estimate required |
| Multiple slab zones | Varies by complexity | Site estimate required |
| System modification | Varies by existing setup | Inspection required |
System cost depends on foundation size and configuration, suction requirements, routing, access, electrical needs, finished areas, and other property-specific conditions.

We start with the actual slab and foundation configuration before determining the system approach.
Suction points, piping, fan operation, routing, and verification are considered as parts of one system.
We work with homeowners throughout York County and surrounding local communities.
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We begin with the radon concern and available test results.
Foundation zones, access, finished spaces, additions, and possible routing are considered.
The system configuration is developed around the foundation conditions.
Suction components, piping, fan, and related system elements are installed and placed into operation.
Post-mitigation testing measures radon after the system is running.