Radon Mitigation
Radon Mitigation
Breathe easy with certified radon protection.
Smart Space designs and installs NRPP-certified radon mitigation systems that quietly protect your home’s air quality and deliver long-term peace of mind.
✓ Free Estimates & On-Site Evaluations
✓ 2-Year Labor Warranty
✓ 5-Year Manufacturer Warranty on RadonAway Fans
✓ Financing Available
✓ Clean, Professional Installations
Why Chose Smart Space?
At Smart Space, we have over 11 years of experience designing and installing active soil depressurization radon mitigation systems.
Our team is NRPP-certified and installs systems in accordance with current national radon mitigation standards and best practices. During installation, we perform diagnostic pressure testing to verify pressure field extension and to properly size and select the radon fan based on system resistance and performance requirements.
We use only high-quality, long-life system components and materials engineered for durability, reliability, and sustained radon reduction.
Why Radon Requires Actions
Radon is an invisible, odorless gas that enters homes from the soil. Long-term exposure to high levels increases the risk of lung cancer.
The good news: radon problems are completely fixable.
Smart Space experts design and install certified mitigation systems that draw the gas safely out of your home, keeping indoor air clean and your family protected.
You will be protecting your investment.
A properly installed system not only safeguards health but can make your home easier to sell—most buyers now expect a recent radon test or active mitigation system in place.
EPA guidance:
Take action when average radon levels reach 4.0 pCi/L or higher. Even lower levels can pose long-term risks
Our Process
Schedule a free quote with one of our expert radon mitigation technicians.
Schedule a Free Radon Mitigation Quote
Schedule a free quote with one of our expert radon mitigation technicians to evaluate your home and discuss the best mitigation options.
We will review your radon levels, explain system design considerations, and provide a clear, no-obligation estimate tailored to your home’s layout.
Professional Installation of Radon Mitigation System
Our professional radon mitigation crew handles every aspect of the installation with precision and care.
From system layout and fan placement to sealing and final performance testing, we ensure your radon mitigation system is installed efficiently, cleanly, and in full compliance with national standards—delivering reliable, long-term radon reduction for your home.
Built to Last
Although our radon mitigation systems are built with durable, long-lasting materials and rarely require follow-up service, at Smart Space we stand behind every installation.
We guarantee our workmanship, ensuring that your system continues to perform effectively and reliably. Our team is always available to address any concerns, giving you complete peace of mind that your home is protected.
How We Reduce Radon in Your Home
Every home has unique soil, foundation, and airflow conditions.
Our NRPP-certified technicians perform a detailed assessment, engineer a tailored mitigation system, and verify post-mitigation radon levels to ensure long-term safety and performance.
On-Site Assessment
Onsite Radon Assessment
Our onsite assessment is a critical step in designing an effective radon mitigation system. A certified NRPP technician will:
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Analyze the home’s foundation and envelope to identify radon entry pathways and potential pressure differentials.
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Perform diagnostic pressure testing to evaluate soil and sub-slab conditions, ensuring proper fan sizing and placement.
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Assess airflow and system routing options, including suction point locations, pipe layout, and vent termination for optimal performance.
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Review insulation, vapor barriers, and sealing needs to maximize system efficiency and long-term radon reduction.
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Provide a tailored system design, including material selection, installation strategy, and projected performance outcomes.
This thorough, science-based approach ensures your radon mitigation system is optimized for durability, efficiency, and long-term safety.
System Design & PFE Testing
Radon Mitigation System Design & Pressure Field Extension Testing
Designing an effective radon mitigation system begins with understanding how radon moves through your home. Our certified technicians create a system tailored to your foundation type, soil conditions, and airflow patterns to ensure optimal radon reduction.
A key part of this process is Pressure Field Extension (PFE) testing. PFE testing measures how far a depressurization system affects the soil beneath your home. By temporarily activating the proposed suction points and measuring pressure changes, we can:
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Determine the optimal number and placement of suction points.
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Ensure the radon fan selected is correctly sized for your system.
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Verify that the system will effectively capture radon across the entire sub-slab area, preventing radon from entering the living spaces.
This science-based approach ensures that your radon mitigation system is efficient, reliable, and built for long-term performance, rather than relying on guesswork or generic designs.
Sub-Slab Depressurization (SSD)
Sub-Slab Depressurization (SSD) Systems
Sub-slab depressurization (SSD) is the most widely used and effective method for reducing radon levels in homes with concrete slab or basement foundations. This system works by creating a controlled vacuum beneath the concrete slab, drawing radon-laden soil gas away from the living space and venting it safely above the roofline.
Key features of SSD systems include:
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Suction Points: Small holes are drilled through the slab to access the soil beneath, where a network of piping collects radon gas.
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Radon Fan: A specialized, continuously operating fan maintains a negative pressure under the slab, preventing radon from entering the home.
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Piping & Venting: PVC piping carries radon safely to the exterior, typically above the roofline, ensuring it does not re-enter the home.
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Sealing & Airflow Management: Cracks, joints, and penetrations in the slab and foundation are sealed to enhance system efficiency and maintain the negative pressure field.
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Performance Verification: Pressure testing and post-install radon measurements confirm the system is effectively reducing indoor radon levels.
By actively controlling the airflow beneath the slab, SSD systems provide a long-term, reliable solution for radon mitigation, protecting both the health of your household and the integrity of your home.
Sub-Membrane Depressurization (SMD)
For homes with both crawl spaces and slabs, we install a robust SMD system including:
- Compressible RadonAway Gas mat under the barrier to extract the radon gas
- 16-mil string-reinforced vapor barrier
- Heat-sealed seams
- Wall and pier attachments
- A high-performance, code-compliant RadonAway fan
Sub-Membrane Depressurization (SMD) Systems
Sub-membrane depressurization (SMD) is an effective radon mitigation method for homes with crawl spaces or dirt floors. This system works by installing a vapor-permeable membrane over the exposed soil and creating a negative pressure beneath it to capture radon gas before it can enter the living space.
Key features of SMD systems include:
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Vapor-Permeable Membrane: A durable plastic sheet is laid over the crawl space floor, sealed around the edges and any penetrations to prevent soil gas from escaping.
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Suction Points: Pipes are installed beneath the membrane to draw radon-laden soil gas into the system.
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Radon Fan: A continuously operating fan maintains a negative pressure under the membrane, safely venting radon above the roofline.
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Sealing & Airflow Management: Gaps around plumbing, vents, and crawl space walls are sealed to enhance system efficiency and maintain consistent sub-membrane depressurization.
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Performance Verification: Post-installation testing ensures the system effectively lowers radon levels and maintains a uniform pressure field under the membrane.
Sub-membrane depressurization systems provide a long-term, reliable solution for radon mitigation in crawl spaces, protecting indoor air quality while ensuring the system is energy-efficient and low-maintenance.
Hybrid Systems
For homes with both a basement and a crawl space, we install dual-suction systems with gate-valve dampers for post-installation balancing and optimal control.
Best Practices
All installations follow ANSI/AARST standards, using high-quality Schedule 40 PVC piping, and full diagnostics.
Our trained crews maintain a safe, clean worksite, and we leave you with clear documentation and follow-up testing options.
Protect your family with professional radon mitigation.
Protect your family with professional radon mitigation.
Radon Mitigation Frequently Asked Questions (FAQ)
What is radon and why is it dangerous?
How does radon get into my home?
Radon enters homes through openings in contact with the ground, such as:
- Cracks in concrete slabs and basement floors
- Gaps around pipes, drains, and sump pumps
- Crawl spaces with exposed soil
- Construction joints and wall-floor seams
- Once inside, radon can build up to unsafe levels—especially in well-insulated, energy-efficient homes that don’t have much air exchange.
How do I know if my home has radon?
The only way to know is to test. Radon cannot be detected by smell or sight. Smart Space offers both short-term and continuous digital radon testing, providing a certified report showing your home’s average radon level in picocuries per liter (pCi/L).
- EPA Action Level: 4.0 pCi/L or higher requires mitigation.
- WHO Recommended Level: 2.7 pCi/L or higher.
What is a radon mitigation system?
A radon mitigation system is a ventilation and depressurization system designed to draw radon gas from beneath your home and safely vent it outdoors before it enters your living space. Most systems include:
- A PVC suction pipe installed through the foundation or slab
- A radon fan that runs continuously to pull gases from beneath the home
- An exterior vent pipe terminating above the roofline
- A U-tube manometer (pressure gauge) that shows the fan is operating properly
How long does installation take?
A standard residential system usually takes 1 day to install. Larger or complex homes (such as those with multiple foundations, crawl spaces, or basements) may require a second suction point or a custom configuration.
A house with a crawl space can take 3-5 days to complete depending on the size of the crawl space.
Does mitigation really work?
Yes. A properly designed and installed system can reduce indoor radon levels by up to 99%. Smart Space uses NRPP-certified techniques and equipment that meet or exceed EPA Radon Mitigation Standards (RMS) to ensure lasting results and compliance with Georgia regulations.
Will a radon system affect my home’s appearance or resale value?
No — most systems are discreetly installed with clean PVC runs and exterior fans mounted on the exterior side (near AC etc) or attic. In fact, radon-safe certification can increase home value and buyer confidence.
Do I need to maintain the system?
Maintenance is minimal:
- Check the U-tube manometer regularly to confirm suction.
- Ensure the fan is running and vent outlet remains clear.
- Retest your home every two years or after major renovations.
- Fans typically last 8–10 years and can be replaced easily.
Is mitigation needed if my neighbor’s test was high?
Not necessarily. Radon levels vary house to house—even next door—because of differences in soil composition, foundation type, and air pressure. Every home should be tested individually.
Who regulates radon mitigation?
In the U.S., the EPA, CDC, and state health departments (such as the Georgia Department of Public Health) oversee standards and licensing. Smart Space Atlanta’s technicians are NRPP-certified, ensuring compliance with national protocols.
Protect Your Home — and Everyone in It
What People Are Saying
Harden is awesome! She is patient and informative. We had a third party radon short-term and long-term test in 2021. The short-term returned at 27.6 pCi/L and the long-term at 12.1 ± 1.6 pCi/L. These results are horrifying! After some research on mitigation specialists, I decided on Smart Space Atlanta. Within 48 hours after installation of the mitigation system, which was pretty much custom since I requested they conceal the system running it through my floors and ceiling versus outside alongside my house, my radon average was 0.3. Fast forward to two years later, I tested two separate areas of the basement with short-term test conducted by Alpha Energy Labs. The room furthest away from the mitigation system returned at Less than 0.9 pCi/L and the main area of the returned at less than 0.7 pCi/L. These are pretty amazing results! My kids and their friends play down in the basement regularly. I have peace of mind that there are no radon exposures concerns. Thank you Harden and Smart Space Atlanta!
— John D.
Partners & Certifications
Smart Insights
Smart Insights is where Smart Space shares in-depth guides on home performance, building science, and HVAC efficiency—helping you understand what really makes a home comfortable and energy-smart.
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