Choices are somewhat limited, based on the kind of foundation your home has (basement, crawl space, or slab). But, all methods usually involve one of two things: preventing radon from entering your home or reducing radon once it has entered your home.
The cost – both of installation and operation – depends on the kind of radon reduction system you and your contractor agree upon. (Prices usually range from $800 to $2,500.)
Soil suction mitigation methods
Homes with slabs or basement foundations and slabs usually need one of four kinds of soil suction mitigation.
- One soil suction method is called subslab suction, or subslab depressurization. In an active subslab suction, suction pipes are inserted through the basement floor into soil underneath the home. A radon vent fan connects to the suction pipes, pulls radon from inside the home, and pushes it outside. Passive subslab suction doesn’t involve a fan – natural pressure pushes the radon out of the home.
- Sump hole suction is another soil suction method that utilizes a sump to both drain water and house a radon suction pipe.
- Drain tiles that channel water away from a home may be suctioned as a way to reduce radon levels inside a home.
- If a home has hollow block foundation walls, a block wall suction method is possible. Radon is removed as the block wall is depressurized.
Other mitigation methods
- For homes with a crawlspace, a submembrane suction is usually helpful. A vent pipe and fan are installed on the earth floor, and a plastic sheet covers the floor. This option vents radon to the outside.
- Radon levels in a crawlspace also may be lowered by installing a fan to blow air through the crawlspace.
- During the mitigation process, foundational cracks may be sealed.
- A heat recovery ventilator may be used, which is simply an effective way to ventilate your home.
- Finally, home pressurization uses a fan to blow air into a section of the home as a way to create pressure to prevent radon from entering a home.
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