Radon Mitigation
Proven Methods
Professional mitigation systems installed by certified radon professionals. Post-installation testing included to verify results.
Skip Testing? Go Direct to Mitigation.
Already know you want protection? Many homeowners skip testing and go straight to installation. This is common in:
- High-risk areas with known elevated radon
- Real estate transactions with tight timelines
- Homes where previous tests showed high levels
- Buyers wanting immediate peace of mind
Post-installation testing is included either way—you'll know your final levels.
Why Radon Mitigation Matters
Radon is invisible, odorless, and identified by the EPA as a leading environmental cause of lung cancer. Professional mitigation is designed to reduce indoor radon concentrations.
Reduce Radon Exposure
The EPA estimates that radon contributes to approximately 21,000 lung cancer deaths annually in the U.S. Mitigation is designed to reduce indoor radon concentrations.
Protect Occupants
Radon exposure affects all building occupants over time. Mitigation systems are designed to reduce radon levels throughout the structure.
Support Property Value
A radon mitigation system can be a consideration during real estate transactions. Many buyers in the Atlanta area inquire about radon status.
Ongoing Risk Reduction
Mitigation systems are designed to operate continuously, providing ongoing radon reduction when properly maintained.
Understanding Radon in Homes
Radon is a naturally occurring radioactive gas that can seep into buildings from the soil beneath foundations. It cannot be seen, smelled, or tasted, making testing the only way to detect its presence.
The EPA estimates that radon contributes to approximately 21,000 lung cancer deaths in the United States each year. This makes radon a significant environmental health concern.
Radon mitigation systems are designed to reduce indoor radon levels by drawing radon-laden air from beneath the foundation and exhausting it above the roofline, where it disperses into the atmosphere.
Local radon conditions vary. Area-level information can help explain why mitigation may be recommended.
The Science
How Radon Mitigation Works
Understanding the science behind mitigation explains why it's so remarkably effective.
Active Soil Depressurization: The fan creates negative pressure beneath the foundation, drawing radon gas through the pipe and exhausting it safely above the roofline.
Pressure Differential
Radon enters homes because indoor air pressure is typically lower than soil gas pressure beneath the foundation. The stack effect, wind, and HVAC systems all contribute to this negative pressure. Mitigation systems reverse this by creating even greater negative pressure beneath the slab, redirecting radon away from your home. Local radon conditions vary. Area-level information can help explain why mitigation may be recommended.
Path of Least Resistance
Radon takes the easiest route available. Without mitigation, that means through cracks, gaps, and pores in your foundation. With a mitigation system, the suction point becomes the easiest path—and that path leads safely outside, not into your living space.
Continuous Extraction
Unlike passive approaches, active mitigation systems run 24/7/365. This provides constant protection regardless of weather conditions, seasonal changes, soil moisture levels, or occupant behavior. Your protection never takes a break.
Safe Dispersal
Extracted radon is exhausted above the roofline where it disperses harmlessly into the atmosphere. Radon is only dangerous when it accumulates in enclosed spaces—once outside, it quickly dilutes to background levels found naturally everywhere.
Types of Radon Mitigation Systems
Different foundations require different approaches. The appropriate system is determined based on property assessment and site conditions.
Active Soil Depressurization (ASD)
(ASD)The gold standard for radon mitigation. A vent pipe and fan system draws radon from beneath your foundation and safely exhausts it above the roofline. This is the most common and effective method, used in over 90% of residential installations.
How It Works
A suction point is created beneath the concrete slab. An inline fan creates negative pressure, drawing radon-laden soil gas through PVC piping and exhausting it safely above the roofline where it disperses harmlessly into the atmosphere.
Sub-Membrane Depressurization (SMD)
(SMD)Specifically designed for crawl spaces. A heavy-duty vapor barrier seals the ground, with extraction points removing radon before it enters your living space. Also controls moisture and improves air quality.
How It Works
A 6-mil or thicker polyethylene vapor barrier is installed over the soil, with edges sealed to the foundation walls. Extraction points beneath the membrane create negative pressure, drawing radon gas out before it can accumulate.
Drain Tile Suction
(DTS)Utilizes your home's existing drainage system around the foundation perimeter to efficiently extract radon gas from the soil. An excellent option when drain tiles are present and accessible.
How It Works
If your home has an existing perimeter drain tile system (interior or exterior), we can tap into it to create suction. The fan draws air through the drain tile network, which effectively covers a large area beneath the foundation.
System Comparison at a Glance
| Aspect | ASD | SMD | Drain Tile |
|---|---|---|---|
| Effectiveness | 95-99% | 90-98% | 95-99% |
| Best Foundation | Basement/Slab | Crawl Space | Any with drains |
| Install Time | 1-2 days | 1-2 days | 1 day |
| Visual Impact | Low | None (hidden) | Low |
| Energy Cost | $50-100/yr | $50-100/yr | $50-100/yr |
The Installation Process
From initial contact to verified results, the process is coordinated through certified radon professionals.
Initial Contact
Property details are gathered to understand the scope and determine whether testing or direct mitigation is appropriate.
Whether testing has already been completed or direct installation is preferred, the process is tailored to the specific situation.
Property Assessment
Foundation type, property layout, and site conditions are evaluated to design an appropriate mitigation approach.
Assessment covers foundation construction, potential suction point locations, optimal pipe routing, and fan placement considerations.
Professional Installation
The mitigation system is installed by certified radon professionals, typically completed within 1-2 days.
Installation is performed with care for property protection. Most systems are operational the same day installation is completed.
Verification Testing
Post-installation radon testing is performed to measure post-mitigation levels and confirm system effectiveness.
Testing confirms radon reduction. Results are documented and provided to the property owner.
Know Your System Is Working
Radon mitigation systems include a manometer or pressure gauge, a visual indicator that shows whether the system is operating as intended.
Visual Confirmation
A quick glance at the gauge tells you the fan is creating proper suction. No guessing required.
Early Warning
If the gauge shows no pressure differential, you'll know the fan needs attention before radon levels rise.
Ongoing Verification
Unlike testing that provides a snapshot, the gauge provides ongoing confirmation that the system is active.
Local Expertise
Radon Mitigation for Metro Atlanta
Radon mitigation approaches are adapted for Atlanta-area geology, soil conditions, and construction patterns common throughout the region.
Granite Bedrock
Georgia is part of the Piedmont geologic province, characterized by granite and metamorphic rocks that can contain uranium, a source of radon. This geology contributes to radon potential in the region. Local radon conditions vary—area-level information can help explain why mitigation may be recommended.
Clay Soils
Heavy clay soils common in Georgia can affect how radon migrates beneath foundations. Mitigation approaches are adapted to address these soil conditions.
Foundation Diversity
Atlanta-area homes include basements, crawl spaces, slab-on-grade, and combinations. Mitigation systems are selected based on foundation type and site conditions.
Climate Considerations
Georgia's climate means homes are often sealed and climate-controlled, which can affect indoor air exchange. Year-round mitigation supports consistent radon reduction.
Frequently Asked Questions
Everything you need to know about radon mitigation
Can I skip radon testing and go straight to mitigation?+
Yes. Many homeowners choose direct mitigation, especially in areas with known radon concerns, during real estate transactions, or when seeking proactive protection. Post-installation testing is included to verify the system's effectiveness and document post-mitigation radon levels.
How quickly can a radon mitigation system be installed?+
Most residential radon mitigation systems can typically be installed within 1-2 days. The system begins operating upon activation, and post-installation testing is generally performed 24-48 hours later to verify effectiveness. Scheduling is coordinated to minimize disruption.
How effective is radon mitigation?+
Professional radon mitigation systems are designed to achieve significant radon reduction, often 95% or greater. The EPA indicates that properly installed active soil depressurization systems can reduce radon concentrations to low levels in most cases. Post-installation testing verifies results for each property.
What type of mitigation system do I need?+
The system type depends on foundation construction. Active Soil Depressurization (ASD) is commonly used for basements and slab-on-grade foundations. Crawl spaces typically use Sub-Membrane Depressurization (SMD) with a vapor barrier. Homes with perimeter drain tiles may use Drain Tile Suction. A property assessment determines the appropriate approach.
Will the system affect my home's appearance?+
Pipe routing is typically planned to minimize visual impact, often through closets, garages, or along less visible exterior walls. Many homeowners find the installed system to be unobtrusive.
How much does radon mitigation cost?+
Radon mitigation costs vary based on home size, foundation type, and system complexity. Contact us for a property-specific assessment and estimate. There is no obligation.
What maintenance is required?+
Radon mitigation systems require minimal maintenance. The fan is the primary mechanical component and typically operates for 10-15 years or longer. Periodic visual checks of the system gauge and radon testing every 2-3 years are recommended to verify continued operation.
How do I know the system is working?+
Every system includes a manometer or pressure gauge that provides visual confirmation of proper operation. The gauge indicates whether the fan is creating the intended negative pressure. If the gauge shows no pressure differential, service may be needed. Some homeowners also use continuous radon monitors for ongoing measurement.
Is radon mitigation worth the investment?+
Radon is identified by the EPA as a leading environmental cause of lung cancer. Beyond potential health considerations, mitigation can support property value and may be required during real estate transactions when elevated levels are detected. Many homeowners find the investment worthwhile.
What if my radon levels aren't very high?+
The EPA recommends considering mitigation at 4.0 pCi/L or higher and suggests considering action between 2-4 pCi/L. There is no known threshold below which radon exposure carries zero risk. Some homeowners choose to mitigate at lower levels to minimize long-term exposure.
Ready to Address Radon?
Request a radon mitigation consultation. Installation is typically scheduled promptly based on availability.
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