Communication and pressure-field testing to work out where suction has to go before anyone cuts a hole. What a designed system starts with.
It is one of the more common requests we route across Hunterdon County, NJ.
How this normally comes up
- The house has additions, a slab, and a crawl space all connected together
- A quote arrived with no diagnostic work behind it
- A system is running and the reading has barely moved
- Nobody can agree where the suction point should go
How it's normally done
Diagnostics means measuring rather than guessing: communication testing to see how far suction actually travels under the slab, pressure-field extension readings at test holes, and sometimes a smoke pencil to find the entry routes. It is what separates a system designed for the house from a fan bolted to a pipe.
Typical cost
Varies with what the diagnostics find. A visit of this kind is normally quoted after someone has looked at the building, not before.
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.
Reading the result
Want to know what a fix would actually cost?
Write down what the system is doing and what the re-test said. We'll get it to crews who diagnose rather than guess.
Tell us what you've got →Coverage
Towns where this is the right question
Only the ground where this is genuinely the right question — we do not generate a page for a service that makes no sense on a given bedrock.
Highlands ridge and limestone valley
Precambrian gneiss and granite of the Reading Prong, cut by carbonate valleys. The highest-potential ground in the county, and almost all of it on private wells.
Newark Basin shale country
Red shale and mudstone of the Passaic Formation under Flemington and the centre of the county. Fractured rock, plenty of basements, and a mix of public water and wells.
Diabase uplands and the Delaware corridor
Sourland-type diabase and the dark argillite of the Lockatong Formation. Stone farmhouses, open crawl spaces, and river-town cellars cut into rock.