There are cracks in the foundation. Nothing structural. Nothing that's going to
threaten the stability of the home, but they're there. Nooks, crannies and holes
through which seeps an invisible threat. Colorless, odorless and undetectable
by your average human, it is the second leading cause of lung cancer in the
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. Rushmore Inspection Services uses Active devises to measure for harmful radon in the homes we test. 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
(http://www.epa.gov/radon/radontest.html) 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 youre 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 youre 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 http://www.epa.gov/radon.