The Radon Testing Process
1st Choice Home Inspections of Knoxville and Nashville performs radon tests year round. Using state-of-the-art, professional, RadStar Continuous Radon Monitoring units, we monitor the home for a minimum of 48 hours, according to EPA standards.
By law, electronic detection equipment must be calibrated annually to certify that it is working properly. 1st Choice Home Inspections’ detectors are calibrated and certified accordingly. Ask your inspector for his or her annual calibration certificate. If he/she can’t produce it, don’t trust the equipment.
A continuous monitor detection unit is placed inside the home at the lowest level (often in the basement) and remains there for the duration of the test. The testing unit takes a reading of the air inside the building every hour.
It is important that the doors and windows remain closed for the duration of the testing. While it may be impractical to keep all the doors closed for the entire time in an occupied home, keep in mind that the frequent opening of doors may cause the test to be inconclusive. Some radon detection units can record when a window or door has been opened.
After the 48 hours of readings have been completed, one of our inspectors retrieves the radon detection unit and downloads the information. This data is then uploaded to the lab for analysis. The lab issues a report indicating the level of radon in the building and forwards that report to us.
If the report returns a radon level of 4 or more, the home is considered to have an unsafe level and mitigation needs to be carried out.