Kingwood Township owners ask about block-wall depressurization more than you would think for a town this size.
The situations this follows from
- A system that was installed under the slab and only got the reading part of the way down
- A hollow concrete-block foundation wall
- An older block wall with an open top course
Why this comes up in Kingwood Township
Kingwood is well country with very little public supply. A well draws from the Lockatong argillite, which is precisely the formation that makes the soil-gas side of this township difficult.
Kingwood Township — the state's own numbers
26% of the 524 test results NJDEP holds for Kingwood Township were at or above the 4.0 pCi/L action level — 136 of them. That puts it in Tier 1 — high potential.
18th and 19th century farmsteads and crossroads hamlets, with scattered later large-lot building.
What access looks like here
Open rural properties with ample room, though long drives and outbuildings can affect staging.
Construction permits go through Kingwood Township, and installing radon mitigation for a fee anywhere in New Jersey requires NJDEP certification.
How it's normally done
Hollow block walls are a network of interconnected voids running from the footing to the top course, and soil gas uses them as a chimney. Treating them means sealing the top course and drawing suction from inside the cavity, usually alongside a sub-slab system rather than instead of one.
Typical cost in Hunterdon County, NJ
$1,800 – $3,200 — typical range, not a quote. What your building needs can only be settled by a certified business that measures it on site.
The right answer depends on your specific building, which is why somebody has to measure it.
What we confirm before anyone calls you
This is certified work in New Jersey, not general home improvement. We look up the business on the NJDEP radon register, confirm the mitigation certification is active, and record the date. Insurance is not part of that check, and nothing here should be read as confirming that any business carries liability cover. None of that is an endorsement of their workmanship — get more than one quote.
Want to know what a fix would actually cost?
Send us the reading and your town. We'll pass it to certified local crews and get out of the way. Free, and you're not committing to anything.
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Also common in Kingwood Township
Other work in Kingwood Township
Same ground, different question.
Block-wall depressurization nearby
Neighbouring towns on the same ground.