Project description
Elevated radon readings in the basement change how the whole house breathes, and the fix is a properly engineered active soil depressurization system rather than a quick patch. The contractor begins with a walkthrough of the slab, the sump pit, and the foundation perimeter to map every crack, floor drain, and utility penetration that could be feeding radon gas into the living space from the soil below.\n\nThe core of the work is sub-slab depressurization: a suction pit is cored through the concrete floor at the most efficient point (often beside the sump basin), and a network of PVC pipe is routed from that pit up through a closet, chase, or exterior wall to a discharge point above the roofline, clear of windows and eaves. Every penetration, expansion joint, and visible crack in the slab is sealed with polyurethane caulk so the system pulls air from beneath the slab rather than from the room itself.\n\nA dedicated radon fan, rated for continuous outdoor duty, is mounted in the attic, garage, or on an exterior wall — never inside occupied living space — and wired to its own labeled circuit with a manometer gauge installed in view so the homeowner can confirm at a glance that the fan is still running. Pipe joints are glued and strapped, and the exterior termination is screened and positioned per code distance from doors and openable windows.\n\nOnce the system is running, it typically takes 24 to 48 hours for radon levels to stabilize before a short-term retest is performed, using either a charcoal canister or a continuous electronic monitor placed in the lowest livable area. The goal is to bring readings well below the EPA action level of 4 pCi/L, and most properly designed systems land in the 0.4 to 1.5 pCi/L range.\n\nA typical installation is completed in a single day for a straightforward slab, with the retest results available within a week, and the finished system carries a workmanship warranty along with documentation the homeowner can keep for real estate disclosures or refinancing.
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