Guidelines for Doing a Follow-up Home Radon Test

(When Your First Test was Less Than 10 pCi/l)

There Are 2 Steps To Radon Home Testing
Radon home testing is usually done in 2 steps or phases. The first step is called a screening test and the second step in a home radon test is called a follow-up test. The purpose of a follow-up test is to collect more information about your home's radon levels so that you can make an informed decision about the need to fix your home.

If you do need to fix your home, the repair (mitigation) contractor will want to see your follow-up test results. This will help him choose the best repair method. The more home radon information or data that you collect with your follow-up test the better informed you and your home radon mitigation contractor will be.

The Longer the Home Radon Test the Better the Home Radon Test
In general, the longer the home radon test the better the home radon test. This is because home radon levels can vary from day-to-day and season-to-season and of course in different parts of your home.

If your screening test was less than 10 pCi/l, we recommend doing your follow-up test between 90 days and 1 year using the Model AT-100 alpha track home radon detectors.
If you need your home radon test results sooner, then you should use our 2 day Model ST-100 home radon test kits. But the ideal home radon test should last for 1 year. Of course you can get the best of both worlds by using both types of detectors at the same time.

Long Term Home Radon Tests Are Done Under Normal Living Conditions
Home Radon tests done for more than 90 days are called long term home radon tests. If your screening test result was less than 10 pCi/l you will probably be using several alpha track home radon detectors for your follow-up test. Since this home radon test will be done for more than 90 days then the test should be done under normal living conditions unlike the "closed-house" conditions used for your screening test.

Test the Same Rooms as Your Screening Test
Your follow-up home radon test should always include the same locations you tested during your screening test. In addition you should always home radon test the footprint of your house. The footprint is the place or places where your home contacts the ground. For example, if you have a basement family room you should test there. If you have a basement and a crawlspace you need to test in the basement and the room above your crawlspace. Never put a home radon test in a crawlspace.

You should only home radon test livable areas of your house. Do not test in garages, dirt floor basements, root cellars, crawlspaces or the like. An example of a livable area might be a bedroom or a playroom. Also an unfinished basement would be considered livable if children could play there.

Also Home Radon Test Rooms Where You Spend the Most Time
Most people don't spend all of their time in the lower levels of their home. So in addition to testing your houses footprint, you should also home radon test other key living areas in your house. These "key living area" tests are called profile measurement because they help give you a better idea of your home radon exposure based on the way you live in your house. For instance, you may only spend an hour or two a day in your basement family room, but you might spend 7 or 8 hours a day in your second floor bedroom.

Your Home Radon Test.Com test kits come with complete placement instructions. But in general, home radon test kits should be placed towards an inside wall, out of direct sunlight and away from drafts cased by doors, windows and HVAC ducts. The home radon test kits should be placed on a table or shelf between knee and shoulder height.

Does Your Water Come From a Well?
If your home's water comes from either a private or a public well you should consider testing that water for radon. Use the WT-100 home radon water kit to send us a water sample for analysis.

To get more help choosing the right radon test kits for your home use our Radon Testing Wizard . Or if you know which test you need you can go directly to the order page.



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