Hunterdon County · 25 of 26 towns NJDEP Tier 1 Action level 4.0 pCi/L Free for homeowners — paid by the crews
Hunterdon RadonTesting & mitigation

Ringoes, East Amwell Township

Crawl space sub-membrane depressurization in Ringoes

Sealed membrane over an open crawl-space floor with suction drawn beneath it. The right system when there is no slab to cut through.

Ringoes owners ask about crawl space sub-membrane depressurization more than you would think for a town this size.

The situations this follows from

  • A crawl space that smells of soil no matter the season
  • Insulation and ductwork in a crawl the ground is open to
  • A dirt-floored or stone-walled crawl space under an older farmhouse

Why this comes up in Ringoes

Public supply is not the norm around Ringoes. A well here draws from the northern edge of the Sourland diabase, which is also what the suction test has to contend with. That is part of the context any crew working in Ringoes has to design around.

East Amwell Township — the state's own numbers

43% of the 1,314 test results NJDEP holds for East Amwell Township were at or above the 4.0 pCi/L action level — 567 of them. That puts it in Tier 1 — high potential.

One of the oldest settlements in the county, with 18th and 19th century houses around the crossroads and farmsteads on the surrounding land.

Practicalities in Ringoes

Village lots are modest; the surrounding farm properties have ample room.

Any permit for this runs through East Amwell Township. NJDEP radon certification has to be current before a business receives anything from us.

How it's normally done

Where there is no slab, the ground itself becomes the barrier. Reinforced membrane is laid over the crawl-space floor, sealed to the walls and around the piers, and a suction point beneath it is piped to a fan. Sealing quality is the whole job here — a membrane taped at the seams and left loose at the wall performs nothing like one properly terminated.

Typical cost in Hunterdon County, NJ

$2,000 – $3,800 — typical range, not a quote. What your building needs can only be settled by a certified business that measures it on site.

What it costs comes down to the foundation, the number of suction points, and where the pipe can run.

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.

Not sure whether your number is a problem?

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.

Get quotes in Ringoes →

Related

Also common in Ringoes

Other work in Ringoes

Same ground, different question.

Crawl space sub-membrane depressurization nearby

Neighbouring towns on the same ground.