Radon mitigation in Nashville, TN follows the EPA Action Level of 4.0 pCi/L, the ANSI/AARST Standards for radon mitigation in low-rise residential (RMS-LB), multifamily (RMS-MF), and large buildings (RMS-LB), and certification through the National Radon Proficiency Program (NRPP) or the National Radon Safety Board (NRSB). EPA places Davidson, Williamson, Wilson, Sumner, Rutherford, and Maury counties inside its high-probability mapping, and published Nashville indoor averages near 7.0 pCi/L sit well above the EPA action threshold. The dominant remediation method for slab-on-grade homes is active sub-slab depressurization (ASD): a suction pit cut into the slab, a sealed PVC stack rising through conditioned space, and an exterior radon fan venting above the roofline. Crawl-space homes use sub-membrane depressurization (SMD) on a sealed encapsulation barrier. The three firms below carry verifiable NRPP credentials, Middle Tennessee service presence, and transparent system framing.
Quick Comparison #
| Firm | Credentials | Focus |
|---|---|---|
| The Radon Guys | NRPP RMT, RMP, RMS, 15-plus years | Residential and commercial mitigation across Middle TN |
| Radon Solutions LLC | NRPP Certified Radon Specialists, veteran-owned | Mitigation, testing, encapsulation across Middle TN |
| Active Radon Mitigation | Sub-slab and sub-membrane depressurization specialist | Residential radon mitigation across Middle TN |
1. The Radon Guys #
The Radon Guys is a Nashville-based radon mitigation specialist with 15-plus years of field experience and thousands of mitigation installations recorded across Middle Tennessee. The firm has held NRPP certifications since 2016 across three categories: Radon Measurement Technician (#112122-RMT), Radon Measurement Professional (#115607-RMP), and Radon Mitigation Specialist (#115174-RMS). That three-credential stack covers measurement, professional measurement oversight, and mitigation design under the same roof.
Mitigation System Scope #
The firm installs sub-slab depressurization systems for slab-on-grade homes, sub-membrane depressurization for vented crawl spaces, and combination systems where a Nashville home mixes a finished basement and a crawl space wing. Crawlspace encapsulation, vapor barrier installation, and energy-recovery ventilator (ERV) installation are offered as complementary lines, with dehumidification sizing for sealed crawl spaces under ANSI/AARST CCAH guidance.
Service Capability and Real Estate Work #
Real estate radon testing under EPA’s Home Buyer’s and Seller’s Guide framework is published as a service line, important for Davidson and Williamson County transactions where buyer-financed mitigation contingencies are common. Radon-resistant new construction consultation under ASTM E1465 framing is also published.
Address: Nashville, TN service area (mobile dispatch)
Phone: (629) 287-0207
Hours: Monday-Friday 8am-5pm
https://thenashvilleradonguys.com/
2. Radon Solutions LLC #
Radon Solutions LLC is a veteran-owned NRPP Certified Radon Specialist firm founded by Nathan and Ashley Manaugh, serving Nashville, Clarksville, Murfreesboro, Brentwood, Franklin, Spring Hill, Mount Juliet, Cookeville, Columbia, Gallatin, and Sparta. The firm pairs NRPP credentials with a licensed electrician on staff, a meaningful detail because mitigation systems require an exterior 120V circuit for the radon fan under National Electrical Code Article 210 branch-circuit provisions.
Performance Guarantee and Warranty #
Radon Solutions publishes a 4.0 pCi/L radon level guarantee where conditions allow and a one-year warranty on system installation. The 4.0 guarantee maps directly to EPA’s action level, the public-facing benchmark a Davidson County homeowner can compare against the post-mitigation re-test result.
Scope Lines #
Service includes radon testing, sub-slab and sub-membrane depressurization installation, crawlspace encapsulation, and free pre-installation consultation. Coverage across both urban Nashville and outlying Clarksville, Cookeville, and Sparta puts the firm inside a wider radius than many radon-only operators.
Address: Middle Tennessee service area (mobile dispatch)
Phone: (629) 295-6222
Hours: Monday-Friday 8am-5pm, closed weekends
https://radonsolutionstennessee.com/
3. Active Radon Mitigation #
Active Radon Mitigation is a Middle Tennessee radon mitigation specialist focused on sub-slab depressurization and sub-membrane depressurization installation for residential homes across Davidson, Wilson, Smith, Maury, Williamson, and Rutherford counties. The firm publishes a detailed technical description of the ASD method, including suction-point design, PVC stack routing, exterior fan placement, and roofline exhaust termination per EPA and ANSI/AARST guidance.
Method Detail #
Active Radon Mitigation’s published process matches the EPA Radon Mitigation Standards and ANSI/AARST RMS-LB sequence: assessment, suction-point cut through the slab, sealed PVC stack run through conditioned space, exterior radon fan installation, exhaust termination above the roofline and at least 10 feet from any opening, and post-mitigation re-test. For crawl-space homes the firm installs a sealed vapor barrier and ties the PVC stack to a sub-membrane plenum.
Coverage #
Service area covers Davidson, Wilson, Smith, Maury, Williamson, and Rutherford counties, the six counties EPA highlights inside the Middle Tennessee high-probability mapping. Free phone consultation and written quotes are available for homeowners who have a recent test result above the 4.0 pCi/L action level.
Address: Middle Tennessee service area (mobile dispatch)
Phone: (615) 260-6123
Hours: Appointment-based
Selection Methodology #
Selection drew on the NRPP and NRSB online certification directories, EPA’s Indoor Radon Mitigation Standards, ANSI/AARST RMS-LB and SGM-SF standards for soil-gas mitigation, the EPA Home Buyer’s and Seller’s Guide to Radon, and direct review of each firm’s website for credentials, address, phone, and method disclosure. Trade credentials reviewed included NRPP Radon Mitigation Specialist (RMS), NRPP Radon Measurement Professional (RMP), NRPP Radon Measurement Technician (RMT), NRSB equivalent credentials, and TN Department of Environment and Conservation registration where applicable. Verification criteria covered a Middle Tennessee service area, a working public phone line, transparent ASD or SMD method disclosure, a post-mitigation re-test commitment, and warranty or performance-guarantee framing. Excluded were testing-only firms that do not install mitigation systems, sealing-only contractors that bypass active depressurization, and out-of-state portals without local field staff.
Frequently Asked Questions #
Q: What is the EPA radon action level and how does Nashville compare?
A: The EPA action level is 4.0 pCi/L of indoor air. Published Nashville indoor averages run near 7.0 pCi/L based on aggregated testing data, and EPA places Davidson, Williamson, Wilson, Sumner, and Rutherford counties inside its high-probability mapping. Any test result at or above 4.0 pCi/L should prompt mitigation.
Q: What is the difference between sub-slab and sub-membrane depressurization?
A: Sub-slab depressurization (ASD) cuts a suction point through a concrete slab, runs a sealed PVC stack to an exterior fan, and pulls soil gas from beneath the slab before it can migrate into living space. Sub-membrane depressurization (SMD) is the crawl-space equivalent, where a sealed vapor barrier acts as the membrane and the fan pulls soil gas from beneath that membrane. Slab-on-grade Nashville homes typically get ASD; crawl-space homes typically get SMD on top of a sealed encapsulation barrier.
Q: Are any of the three firms paid placements?
A: No. The three profiles above are editorial selections drawn from publicly verifiable sources. No firm sponsored placement.
Q: How soon after mitigation should a Nashville home be re-tested?
A: EPA guidance is a post-mitigation re-test no sooner than 24 hours after the fan activates and within 30 days of the install date, using a closed-house protocol for the measurement period. A long-term passive alpha-track test can follow at 90 days or more for confirmation across seasonal variation.
Editorial Note #
This guide was published on 2026-05-11 and reflects research current as of that date. Verify licenses, phone numbers, and current business status before engaging any firm.