Radon Mitigation Systems in Springfield, IL

If your Springfield-area home tested at or above 4.0 pCi/L, a radon mitigation system is the standard fix. IEMA-OHS recommends hiring a licensed mitigation professional, "as you would hire a licensed plumber, HVAC or other specialist." EPA says reduction systems can lower levels by up to 99%. Here's how the systems work and how to compare quotes.

How radon mitigation systems work

EPA generally prefers methods that prevent radon from entering over methods that dilute it once it's inside. The main approaches in EPA's Consumer's Guide to Radon Reduction:

Sub-slab depressurization (basements and slab homes)

The most common system, and the one IEMA-OHS names as most used by radon reduction firms. One or more suction pipes go through the floor slab into the soil or gravel beneath. A radon fan pulls the gas from under the house and releases it outdoors, while lowering pressure under the slab so less gas gets in.

Drain-tile and sump suction

Homes with perimeter drain tile or a sump pit can often use them as the suction point, with an airtight sump cover so the sump still drains.

Sub-membrane depressurization (crawlspaces)

The crawlspace floor is covered with a heavy plastic sheet sealed at the seams and walls, and a pipe and fan pull radon from beneath it. EPA calls this the most effective approach for crawlspace homes. Many older homes combine a basement with a crawlspace, and they may need both methods.

Sealing and other add-ons

Sealing cracks and openings helps other methods work, but EPA doesn't recommend sealing alone.

What a good installation includes

• Exhaust pipes vent above the roof surface, away from windows and other openings.
• The fan is not in or below living space: an attic, garage or outdoor-rated fan.
• A warning device (usually a U-tube manometer) shows the system is running.
• Components are clearly labeled, and electrical work follows local code.
• A post-mitigation test. IEMA-OHS says post-mitigation testing must be performed to determine whether the system works.
• Written operating instructions and copies of any warranties.

New homes in Illinois

Since June 2013, Illinois's Radon Resistant Construction Act has required passive radon-reduction features in new homes (IEMA-OHS). EPA notes a passive system can usually be upgraded to an active one by adding a fan if a test shows it's needed. Ask a licensed mitigator to check yours.

How to compare quotes

EPA recommends getting estimates from more than one qualified mitigator. Ask each one:

1. Do you hold a current IEMA-OHS radon mitigation license? Then verify it on the IEMA-OHS licensee search.
2. Which method do you recommend for my foundation, and why? How many suction points?
3. Where will the pipe and fan go?
4. What's the total price, including permits? Is the post-mitigation test included?
5. What's guaranteed (a result below 4.0 pCi/L, the fan, the workmanship), and for how long?
6. Will I get a written contract?

See radon mitigation cost in Springfield for the IEMA-OHS range, or send your test result below.