Things You'll Need:
- concrete patching compound to repair any cracks in foundation
- concrete sealing paint to minimize radon inflow
- contractor to install sub slab pressurization system
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Step 1
Test the level of radon gas in your home. If the level of radon in your home is above the EPA's suggested limit of 4 pCi/L you should mitigate (reduce) the level of radon in your home.
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Step 2
Evaluate your options based on the radon concentration in your home. There are several things you can do.
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Step 3
Seal all cracks and openings in your basement walls. This will reduce the amount of radon seeping into your home, but it isn't a total cure.
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Step 4
Increase the air flow through your basement (this can be as simple easy as leaving a window open and putting a fan in the basement). This will help remove concentrations of radon gas accumulating on the lower levels.
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Step 5
Use a house/room pressurization system to block the entry of radon into your home. This method uses a fan to blow air into the basement. In effect, it forces the radon gas out of your home.
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Step 6
Install a sub-slab pressurization system. This is considered the most effective way to mitigate against radon, but it's also the most costly. While a skilled do-it-yourselfer could install a system, often the best choice is to have a qualified contractor install the system. Depending on your style of home, an active sub-slab pressurization system will cost from $1,000 to $2,500.
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Step 7
Building a sub-slab pressurization system is a 3-step process. First, collection pipes need to be installed beneath the foundation. Then, the collection pipes must be connected to a riser pipe that runs vertically from below your foundation to the top of your home. Finally, a fan actively draws the air into a collector pipes and up the vent to where it can be dispersed into the atmosphere.
