Radon Testing

Radon is so common, that some estimate (including InterNACHI) that up to 60% of our radiation exposure in life comes from radon. So what does that mean for you? It means that radon testing is important! Having your home professionally tested for radon by a qualified tester, such as Radon Defense, reduces your health risks. Radon Testing is important no matter what house style that you live in, because radon gas can be found in all homes and buildings. The EPA recommends that ALL homes be tested for Radon gas, and re-tested every two years.

So how does our radon testing work?

At Radon Defense we deploy the most up-to-date Radon Gas Testing devices. The form of testing used by our certified technicians is a short term ION chamber measurement system which can be used for both short, and long term testing. When using this system we deploy two radon chambers side by side for a minimum of 48 hours and up to 90 days. We then have each chamber analyzed in office and take the average of both tests and have a generated report ready for you to view your radon gas levels.

Short-Term vs. Long-Term Testing

Short-term radon testing is most commonly used during the Real Estate transaction process, because time is of the essence during the sale/purchase of a home, but short-term test can be deployed for the home owner who is curious about their exposure. Short-term tests must sit for a minimum of 48 hours, and can be deployed for a maximum of 90 days. During short-term radon gas test closed house conditions must be maintained 12 hours prior to testing and throughout the duration of the test. Closed house conditions include: 1.All windows must remain closed 2.All exterior doors must remain closed except for normal entry and exit 3.Any fan or machine that brings air from the outside, must be shut off (excluding radon mitigation fans)

Long-term radon testing allows for a better representation of year round radon results. Long-term radon tests must sit for a duration from 91-365 days. Long-term test allow for normal living conditions throughout the duration of the test (closed house conditions do not apply). The length of the long-term test allows for the home owner to understand the radon exposure over the course of the testing period, and shows how the radon levels fluctuate.

For Real Estate transactions we can have results and reports read within 1 hour of retrieving the measurement/test devices.

Contact us today and to have your home professionally tested for radon!


Feel free to also contact us for a free copy of one of the following EPA’s publication: “A Citizens Guide to Radon” or “Home Buyers and Sellers guide to Radon” which give a great explanation on what radon is, and how the testing and mitigation processes work.



Radon Testing in: Annandale, Arlington, Bristow, Centreville, Dumfries, Fairfax, Falls Church, Fredricksburg, Gainesville, Manassas, Mclean, Great Falls, Stafford, Vienna, Warrenton, Woodbridge, Alexandria, and surrounding areas of Virginia!