Active sub-slab depressurization
One or more suction points through the slab, sealed pipe to above the roofline, and a fan outside the living space. The system most Hunterdon houses get.
$1,200 – $2,600
typical range, not a quote
Crawl space sub-membrane depressurization
Sealed membrane over an open crawl-space floor with suction drawn beneath it. The right system when there is no slab to cut through.
$2,000 – $3,800
typical range, not a quote
Drain tile and sump-based depressurization
Sealing the sump and drawing suction through an existing perimeter drain loop. Efficient where the drainage is already there.
$1,400 – $2,800
typical range, not a quote
Block-wall depressurization
Suction drawn from inside a hollow block wall, with the top course sealed. The piece a slab-only system misses on block foundations.
$1,800 – $3,200
typical range, not a quote
Multi-point suction for large and additioned homes
Separate suction points for slabs that don't talk to each other, tied into one riser. What a rambling house or a stubborn reading usually needs.
$2,600 – $6,000
typical range, not a quote
Sealing, sump covers and slab-crack closure
Gasketed sump lids, sealed floor-wall joints, and closed slab penetrations. Rarely enough alone — but it makes the system that follows work properly.
$400 – $1,300
typical range, not a quote
Radon fan replacement and system service
Swapping a worn or failed fan for one matched to the pressure the system runs at, and confirming the house came back down afterwards.
$300 – $750
typical range, not a quote
Failed and non-compliant system repair
Diagnosing why an existing system didn't get the number down, and fixing the actual cause rather than adding a bigger fan.
$500 – $1,800
typical range, not a quote
Never tested, and wondering whether to?
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