Why Radon Mitigation Is Crucial for Homes with Basement Slabs

According to the Environmental Protection Agency (EPA), radon is the second leading cause of lung cancer in the United States. Because it’s colorless and odorless, most families don’t know they’re exposed to high levels of radon gas until it's too late.

In Central Ohio, high levels of radon gas are common due to:

  • Soil composition that releases large amounts of radon
  • Cracks and gaps in the basement slab and walls
  • Poor ventilation in below-ground and slab-on-grade homes
  • Unsealed sump pits and utility intake penetrations

Radon testing is the first step in identifying your risk. If your test reveals levels at or above 4.0 pCi/L, mitigation is not just recommended — it's essential.

How Our Basement Radon System Works with Sub-Slab Suction

We use sub-slab depressurization (SSD) — the gold standard for radon mitigation in homes with basement or slab foundations. This system works by creating a pressure differential that prevents radon from entering living spaces.

Key System Components:

  • A suction point is drilled through the slab and gravel layer
  • A 3–4 inch diameter PVC pipe is installed to extract radon from below the slab
  • A high-efficiency radon fan draws the gas out
  • An exhaust pipe vents the gas safely above the roofline

We also:

  • Seal floor cracks, seams, and gaps with hydraulic cement
  • Install a manometer to monitor suction effectiveness
  • Offer optional heat recovery ventilator systems to enhance indoor ventilation

Crawlspace Radon Mitigation: Protecting More Than Just the Basement

For homes with crawl spaces, radon intrusion is a real concern — especially in older homes with exposed soil or unsealed construction seams. Crawlspaces may seem separate from the main living area, but radon can easily enter through utility chases, air returns, and gaps in flooring.

Our crawlspace radon mitigation systems use sub-membrane depressurization (SMD) — a method proven effective in reducing radon levels across flexible ground surfaces.

Our Crawlspace Mitigation Process Includes:

Installing a 6-mil or thicker polyethylene vapor barrier over exposed earth
Overlapping and sealing all seams with radon-resistant tape and caulk
Extending the barrier up foundation walls and around supports
Placing a perforated pipe beneath the membrane as a collection point
Connecting the pipe to a dedicated radon fan and exhaust system, which may be integrated with a basement system or stand alone

This solution ensures a complete suction field under the entire crawlspace, maintaining proper negative pressure and reducing moisture and mold risk in addition to radon.

We consider factors
such as:

Crawlspace size and layout
Soil type and moisture content
Accessibility and ventilation pathways
Integration with slab systems in hybrid homes

The result? A safer, cleaner, and better-sealed home environment with dramatically reduced levels of radon gas.

What Makes a Quality Basement Radon Mitigation System?

Every home is different — your system should be too. A well-designed basement radon mitigation system takes into account:

Thickness and composition of the slab
Total square footage and airflow layout
Number and placement of suction points
Efficient routing of vents to maintain air draw
Considerations for humidity, insulation, and intake location

When installed correctly, a mitigation system operates quietly, efficiently, and with minimal visual impact.

Is DIY Radon Mitigation Safe or Worth the Risk?

DIY radon mitigation may seem appealing, but it comes with major limitations and safety concerns:

Improper pipe sizing or slope can reduce suction or cause moisture buildup
Fans may be underpowered or installed in the wrong location
No diagnostic tools like a manometer means no performance tracking
Exhaust pipes placed too close to windows can backdraft harmful gas

For something this critical, it’s best to trust licensed radon mitigation professionals who understand code, diagnostics, and system design.

FAQs About Basement Radon Mitigation Systems

Radon is a radioactive gas that naturally forms from the breakdown of uranium in soil, rock, and water. It enters your home through cracks in the foundation, sump pits, and other openings. Long-term exposure to elevated radon levels is a serious health concern and the second leading cause of lung cancer in the U.S., especially for non-smokers.

The first step is to test your home using either a short-term (2–7 day) or long-term (90+ day) radon test kit. This is a good option for DIY homeowners or anyone simply curious about their indoor radon levels.

However, for more accurate results—especially when testing for real estate, health concerns, or mitigation planning—professional radon testing ensures proper placement, certified monitoring, and expert interpretation by a licensed radon contractor.

In Central Ohio, most systems range from $900 to $1,800, depending on your home’s size, layout, and foundation type. Crawl spaces, extra suction points, and long exhaust pipe runs may increase costs. We always provide clear estimates and custom designs for every home.

Get a Free Quote

Most systems are installed in 1 to 2 business days. We walk you through the process, keep our work neat, and leave your home exactly as we found it — except safer.

Our systems are designed to be low-profile. We use color-matched exhaust vents, attic-mounted fans when possible, and compact piping layouts. Function matters most — but aesthetics are never ignored.

Yes. Radon tends to be more concentrated in colder months when windows are closed, so it’s a great time to test and install. Our systems work year-round, regardless of season.

Every installation includes a U-tube manometer that lets you visually confirm the system is pulling suction. We also offer digital monitoring options and post-installation radon testing to ensure levels are safely reduced.

Very little. Check the manometer monthly, and schedule a radon test every two years. Our fans typically last 7 to 10 years and are easy to replace. We’re happy to handle service calls or inspections when needed.

Our experienced field technicians install every system under the direct on-site supervision of a licensed radon mitigation specialist. This approach ensures full compliance with Ohio Department of Health regulations while allowing our team to work efficiently, safely, and to exacting standards.

Our licensed professionals oversee every critical step — from confirming system layout and suction point placement to verifying pressure differential and final system testing. It’s the right balance of hands-on expertise and teamwork, backed by 30+ years of trusted service.

What to Expect From Our Radon Mitigation Specialists

Free consultation and radon review
Custom-designed basement radon mitigation system or hybrid setup
Professional installation, typically completed in 1–2 business days
Minimal disruption and clean workmanship
Full documentation, warranty, and follow-up support

A licensed radon specialist manages and verifies each project, ensuring safety, compliance, and long-term protection.

Why Columbus Trusts Airduct Cleaning & Radon Co.

Over 30 years of dedicated service across Central Ohio
Licensed Radon Contractor — Ohio Department of Health License #RC362, Specialist License #RS384
Experts in Basement and Crawlspace Radon Mitigation — Custom systems built for Ohio homes
Transparent pricing with no hidden fees or surprise add-ons
Trusted by families in Columbus, Dublin, Grove City, Springfield, Cincinnati, and beyond

"After install, our levels dropped from 6.3 to 0.7 pCi/L. Great experience." — Allison T., Grove City, OH



"Prompt, professional, and got our radon levels down well below EPA standards." — Kevin S., Dublin, OH

Get a No-Pressure Quote for Your Radon Mitigation System

The first step to safer air is testing. The next is trusted mitigation.

Licensed. Proven. Local. Get a clear plan for your basement or crawlspace.



Restore your peace of mind — breathe safer with Airduct Cleaning & Radon Co.

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