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

Milford, Milford Borough

Crawl space sub-membrane depressurization in Milford

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

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

The situations this follows from

  • A reading that stays high in a house with no slab to work through
  • A dirt-floored or stone-walled crawl space under an older farmhouse
  • Insulation and ductwork in a crawl the ground is open to

Why this comes up in Milford

The village has a borough supply, and the ground around it does not always. A well here draws from the basin-margin rock beneath Milford.

Milford Borough — the state's own numbers

42% of the 1,210 test results NJDEP holds for Milford Borough were at or above the 4.0 pCi/L action level — 505 of them. That puts it in Tier 1 — high potential.

A compact old mill village of 19th century houses on modest lots, with limited later building.

Getting the work done in Milford

Modest village lots with usable side access on many properties.

Milford Borough handles permitting for work at this address.

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.

The sooner it is measured, the more of the options stay open.

Who is allowed to do this in New Jersey

Under N.J.A.C. 7:28-27 this is not work a general contractor may take on. It requires a business certified by NJDEP for radon mitigation, with a certified mitigation specialist directing the work. We verify that on the state register, note the date, and route accordingly — but a verified certification is a fact, not a recommendation.

Want to know what a fix would actually cost?

Give us the short version and the timeline. We'll put it in front of crews who can work to it, and tell you honestly if nobody can.

Get quotes in Milford →

Related

Also common in Milford

Other work in Milford

Same ground, different question.

Crawl space sub-membrane depressurization nearby

Neighbouring towns on the same ground.