Radon Test – 2 Day Real Estate Test

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Since during a 2 day test, the home might not have its highest levels of radon, it is possible that the results would not be accurate. Therefore, for a 2 day test, the home is tested under closed house conditions. This simply means that all the doors, windows and exhaust fans must be shut for 12 hours before the test begins and for the entire duration of the test. This will ensure that the radon concentrations during this period will be concentrated so that a potential of high radon in the home will be identified.

The following excerpt from the EPA explains the details of a Closed House.

“When you are taking a short-term test, close windows and doors and keep them closed, except for normal entry and exit. If you are taking a short-term test lasting less than four days, be sure to:

  • Close your windows and outside doors at least 12 hours before beginning the test;
  • Do not conduct short-term tests lasting less than four days during severe storms or periods of high winds;
  • Follow the testing instructions and record the start time and date;
  • Place the test device at least 20 inches above the floor in a location where it will not be disturbed and where it will be away from drafts, high heat, high humidity, and exterior walls;
  • Leave the test kit in place for as long as the test instructions say; and
  • Once you have finished the test, record the stop time and date, reseal the package and return it immediately to the lab specified on the package for analysis.

You should receive your test results within a few weeks. If you need results quickly, you should find out how long results will take and, if necessary, request expedited service.

If You Hire a Qualified Radon Tester

In many cases, home buyers and sellers may decide to have the radon test done by a qualified radon tester who knows the proper conditions, test devices, and guidelines for obtaining a reliable radon test result. They can also:

  • Evaluate the home and recommend a testing approach designed to make sure you get reliable results;
  • Explain how proper conditions can be maintained during the radon test;
  • Emphasize to occupants of a home that a reliable test result depends on their cooperation. Interference with, or disturbance of, the test or closed-house conditions will invalidate the test result;
  • Analyze the data and report measurement results; and
  • Provide an independent test.
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