About the service
I install active sub-slab depressurization (ASD) radon mitigation systems in basements and crawlspaces that test above the 4.0 pCi/L action level, reviewing your short-term or long-term test results before recommending a suction point layout rather than defaulting to a single-point design that undersized homes often need reworked later.
Work covers core-drilling or excavating the sub-slab suction pit, sizing and routing 3” or 4” PVC vent piping from the suction point up through the rim joist or roof penetration with proper slope and support strapping, sealing all slab penetrations, floor-wall joints, and sump basin openings with polyurethane sealant, and fitting a gasketed, airtight sump lid with a secondary suction fitting when the sump serves as the collection point.
Fan selection is matched to the sub-slab communication test and soil permeability rather than a flat default: I run a manometer-based communication check at multiple test holes to confirm negative pressure field extension before choosing an inline radon fan sized for the actual vacuum and flow needed, then mount it in an unconditioned space or exterior run per code clearance from windows and eaves.
Every installation ends with a U-tube manometer installed on the vent pipe, labeling, and a post-installation retest scheduled 24-48 hours after system startup to confirm the reading has dropped below the action level, with a written summary of suction point locations, pipe routing, and fan model for your records. Typical turnaround is one to two days on-site depending on slab access and crawlspace conditions, with scheduling within the week.
Work covers core-drilling or excavating the sub-slab suction pit, sizing and routing 3” or 4” PVC vent piping from the suction point up through the rim joist or roof penetration with proper slope and support strapping, sealing all slab penetrations, floor-wall joints, and sump basin openings with polyurethane sealant, and fitting a gasketed, airtight sump lid with a secondary suction fitting when the sump serves as the collection point.
Fan selection is matched to the sub-slab communication test and soil permeability rather than a flat default: I run a manometer-based communication check at multiple test holes to confirm negative pressure field extension before choosing an inline radon fan sized for the actual vacuum and flow needed, then mount it in an unconditioned space or exterior run per code clearance from windows and eaves.
Every installation ends with a U-tube manometer installed on the vent pipe, labeling, and a post-installation retest scheduled 24-48 hours after system startup to confirm the reading has dropped below the action level, with a written summary of suction point locations, pipe routing, and fan model for your records. Typical turnaround is one to two days on-site depending on slab access and crawlspace conditions, with scheduling within the week.
