|| There are cracks in the foundation. Nothing structural. Nothing that is going to threaten
the stability of the home, but they are there. Nooks, crannies and holes through which seeps an invisible threat.
Colorless, odorless and undetectable by your average human, it is none the less the second leading cause of lung
cancer in the United States.
Radon gas - even the name sounds ominous, evoking images of radiation and nuclear
devastation is created when uranium in the soil decays. The gas then seeps through any access point into a home.
Common entry points are cracks in the foundation, poorly sealed pipes, drainage or any other loose point. Once in
the home, the gas can collect in certain areas especially basements and other low-lying, closed areas and build up
over time to dangerous levels. The Environmental Protection Agency of the US Government has set a threshold of 4 pico
curies per liter as the safe level. As humans are exposed to the gas over a period of years, it can have a significant
and detrimental effect.
How widespread is the problem? Radon has been found in homes in all 50 states.
Certain areas are more susceptible than others (http://www.epa.gov/radon/zonemap.html),
but no location is immune.
Concentrations of radon-causing materials in the soil can be either natural or man-made. Homes built near historic
mining operations may be at higher risk. The only way to tell for sure is to have a home tested.
Testing for radon comes in two forms: active and passive. Active devises constantly
measure the levels of radon in a portion of the home and display those results. Passive devices collect samples over
a period of time and then are taken away and analyzed. Either method can help you determine your level of risk.
Do-it-yourself kits are available from a number of outlets, normally with passive devices. Over a period of days,
the device is left in the lowest level of the home which is normally occupied. This eliminates crawl spaces under
the house, but includes finished or unfinished basements. Then the results are analyzed by a professional. The other
option is to engage a qualified professional to conduct the tests properly. The EPA web site
provides information on finding an appropriate resources and testing devices.
If high concentrations of radon are found in your home, you have several options.
Since radon is only a problem when it is concentrated in high volume, improving the ventilation in an area is often
sufficient to solve the problem. In other cases, it may be necessary to limit the amount of radon getting into
the home by sealing or otherwise obstructing the access points. Once again, a professional should be engaged to
ensure that the radon is effectively blocked. Typical radon mitigation systems can cost between $800 and $2500,
according to the EPA.
If you are buying or selling a home, radon can be a significant issue. Buyers should
be aware of the radon risk in their area and determine whether a radon test is desirable. When in doubt, the EPA
always recommends testing. The cost of the test can be built into the house price. If test results already exist,
make sure they are recent or that the home has not been significantly renovated since the test was performed. If in
doubt, get a new test done. If you are selling a home, having a recent radon test is a great idea. By being proactive,
you can assure potential buyers that there is no risk and avoid the issue from the start.
So whether you have an old home or a new one, live in an old mining town or in the
middle of the Great Plains, radon is a reality. But it is a reality that we can live with. Proper testing and mitigation,
can eliminate radon as a health threat. For more information, visit the EPA web site on radon at