There are home hazards you can see, smell, or hear. A leaking pipe, a failing roof, a furnace that struggles to kick on. And then there is radon: a radioactive gas with no color, no odor, and no warning signs whatsoever. It moves silently through the soil beneath a home, seeps through foundation cracks and openings, and accumulates indoors to levels that, over time, significantly increase the risk of lung cancer. Radon testing is the only way to know whether your home has a problem, and in New Jersey, that question is worth asking.
What Radon Is and Where It Comes From
Radon is a naturally occurring radioactive gas that forms from the decay of uranium in soil, rock, and water. It exists at low levels virtually everywhere, but the concern is what happens when it enters an enclosed space and builds up. Homes create the perfect conditions for that accumulation. The pressure difference between the interior of a home and the soil beneath it draws radon upward through foundation cracks, gaps around pipes, construction joints, and even through porous concrete block walls.
Once inside, radon has nowhere to go in a well-sealed modern home. It circulates, gets breathed in, and over years of exposure, the radiation damages lung tissue in ways that can lead to lung cancer. The EPA considers radon the second leading cause of lung cancer in the United States, behind only smoking.
New Jersey and Radon: A Real and Local Concern
Radon is not a regional problem limited to certain parts of the country. It has been detected at elevated levels in homes in every state, and New Jersey is no exception. The geology of the state, particularly in northern and central regions, contributes to meaningful radon potential in many communities. Because levels can vary significantly from one home to the next even on the same street, the only reliable way to assess the risk in a specific property is to test it directly.
What the Radon Testing Process Involves
Professional radon testing is straightforward and unintrusive. At TF Home Inspection, radon testing is conducted by a licensed radon measurement professional. Testing devices are placed in the lowest livable area of the home, typically a basement or ground-floor space, and left in place for a set period to collect accurate readings. The results indicate the average radon concentration in the home, measured in picocuries per liter of air.
The EPA recommends taking action when radon levels reach 4 pCi/L or higher. Levels between 2 and 4 pCi/L are also worth considering for mitigation, as there is no fully safe threshold for radon exposure.
What Happens If Radon Levels Are Elevated
An elevated radon result is not a reason to walk away from a home purchase or panic as a current homeowner. Radon mitigation is a well-established, effective process that typically involves installing a sub-slab depressurization system, which draws radon from beneath the foundation and vents it safely outside before it can enter the living space. Mitigation systems are relatively affordable, highly effective, and can be installed in most homes without significant disruption.
If radon testing during a home purchase reveals elevated levels, it is reasonable to request that the seller install a mitigation system or provide a credit toward the cost as part of your negotiation. Having the test result in writing from a licensed professional gives that request clear, documented support.
Radon Testing for Current Homeowners
Radon testing is not only relevant during a real estate transaction. The EPA recommends that all homes be tested for radon, and that homes be retested every two years or after any significant renovation or structural change. Sealing gaps, finishing a basement, or adding on to a home can all affect how radon moves through and accumulates in the space. Regular radon testing keeps you current on what your family is actually breathing.
Adding Radon Testing to Your Home Inspection
For buyers in the middle of a transaction, adding radon testing to your home inspection appointment is the most efficient approach. TF Home Inspection offers radon testing as part of their inspection services, conducted by a licensed measurement professional. Getting it done at the same time as your home inspection simplifies scheduling and ensures you have a complete picture of the property’s condition before closing.
Frequently Asked Questions About Radon Testing
How long does radon testing take?
Radon testing requires the device to remain in place for a minimum period to collect an accurate reading, typically 48 hours for a short-term test. Your inspector will place the device and return to retrieve it at the appropriate time, after which results are processed and reported.
Can I use a DIY radon test kit instead of hiring a professional?
DIY kits are available at hardware stores and can provide a general indication of radon levels. However, for a real estate transaction or any situation where you need results you can act on confidently, a test conducted by a licensed radon measurement professional carries more weight, follows proper protocol, and is less susceptible to the placement and handling errors that can affect consumer kits.
If a home has never been tested for radon, does that mean levels are probably fine?
Not at all. The absence of prior testing simply means no one has measured it. Radon levels have no relationship to how the home looks, how old it is, or how well it has been maintained. Testing is the only way to know, and a home that has never been tested has an unknown radon status, not a clean one.
What is the difference between radon testing and radon mitigation?
Testing measures the concentration of radon present in the home. Mitigation is the process of reducing those levels if they are elevated. TF Home Inspection handles the testing side. If mitigation is needed based on results, a certified mitigation contractor would handle the installation of the appropriate system.
Should I test for radon even if I have a newer home with a well-sealed foundation?
Yes. Radon enters through the pressure differential between the home and the soil, and modern construction methods that create tightly sealed buildings can actually result in higher indoor radon concentrations because there is less natural ventilation to dilute it. A well-sealed home is not a radon-proof home.
TF Home Inspection proudly serves all of New Jersey. To schedule radon testing alongside your home inspection or as a standalone service, call or text 908-463-3423 or book online today.
