Radon gas does exist in the air at safe levels (at 0.4pCi/L). The trouble exists when radon is trapped. Radon levels over 4 pico curies per liter (4pCi/L) are considered dangerous. If you or a radon specialist find levels higher than that, consider reducing the levels of radon in your home immediately.
How Do I Reduce the Radon Level?
The "subslab depressurization system" is the most common and effective way to reduce radon in the home. This system’s name is trickier than the technology. It’s basically PVC piping and a small fan. The piping is installed below the basement floor and run to the roof. The pipe in the basement is submerged below the basement slab and sealed. The end of the pipe that is above the eaves of the house is fitted with a small exhaust fan. This fan causes a suction that removes the gas and vents it into the atmosphere.
Should I Do It Myself or Call a Professional?
It is possible to install a radon reduction unit yourself. And, again, it will be considerably less expensive than if a professional does the job. Professional jobs can cost in the high 100s to the low 1000s. (Because some jobs are complicated, there is a wide range in the basic pricing.) If you do it yourself, it is advisable that your have experience with PVC piping and wiring.
When Should I Test Again?
If your radon levels were below 4 pCu/l the first time, it’s a good idea to test for radon levels every 2 or 3 years based on your soil and previous readings. Loose soil allows gas to travel more quickly than clay. Furthermore, if you have recently weatherized your home, if you’ve installed a central heating and air conditioning unit, if you’ve built additions in the basement or done any construction, have your radon levels checked.