Radon is a chemical element with the symbol Rn and atomic number 86. It is a radioactive, colorless, odorless, tasteless noble gas. This gas is the leading cause of lung cancer outside of cigarette smoking — and you might not even know that it is present until it is too late. Radon gas enters homes and buildings through cracks in the floor, foundation, basement, and other areas. Once it enters, radon will accumulate in your home. The problem is, that you won’t know it’s there — unless you test for Radon. Honest Fact: All homes have some levels of Radon.
4 Ways Radon Builds up in a Home:
- There must be adequate uranium in the soil.
- There must be enough soil permeability from bedrock into the home.
- House must have imperfections, holes or cracks which allows radon gas to enter through the basement, slab or crawl space.
- Pressure inside the house must be lower than the soil.
There are two kinds of tests to measure radon levels in your home – short term tests, which take 2 to 7 days, and longer-term tests, which can take several months. The lowest level room in the house is where the test should be conducted. If Radon is present, you might need to have an expert install a Radon Mitigation System in your home. Crawl space encapsulation is the first step in reducing radon levels. Crawl spaces should be sealed and encapsulated with a continuous vapor barrier. Encapsulating the crawl space reduces the migration of radon into the air. Next make sure you always have a clean furnace filter & air out your house. The test period is very important & a longer test period is better than a shorter one. Findings show radon tests of less than 90 days are imprecise up to 99 percent of the time. … A new study finds the only reliable way to measure exposure to radon gas is with a long-term testing kit, 90 or more days. This is where you and your family live and spend a lot of time. Take the time & do it right.
Generally speaking, it only takes one to three days to remove the radon from your home, and then it will need to be tested again. If levels are above the recommended threshold of 4 pCi/L, a radon mitigation system can be installed to prevent more radon from coming into your home.
Depending on the country, acceptable radon levels vary. A generally accepted action level established by the World Health Organization, the WHO, is 100 Bq/m3, or 2.7 pCi/L. Homes or structures measuring higher are advised to take remedial action to lower radon levels. The WHO further advises an upper limit that should not be exceeded at 300 Bq/m3, or 8 pCi/L.
Radon Detectors ($179) (7 days to every month test)
Radon Test Kit ($170) (91 day test)
Home Depot Radon Kit ($14)
Airflow from ground to Subfloor
Radon Migration System