Crawl Space Radon Testing & Mitigation in Tennessee — Done Right.
Protect your family from invisible danger — certified radon testing and professional mitigation systems installed right the first time.
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What Is Radon — and Why Should You Test?
Radon is a colorless, odorless radioactive gas that forms naturally from uranium decay in soil and rock. It seeps up through crawl spaces, foundation cracks, and slab penetrations into your living space. Radon is the second-leading cause of lung cancer in the United States after smoking—responsible for over 21,000 deaths per year according to the EPA.
Tennessee has elevated radon zones, particularly in Middle and Upper Cumberland counties where geology creates higher-than-average radon potential. The only way to know if your home is safe is to test. And the good news: if levels are high, a properly installed mitigation system can reduce radon by up to 99%.
6 Reasons to Test Your Home for Radon Now
Invisible & Odorless Risk
Radon cannot be seen, smelled, or detected by any human sense. The only way to know your exposure level is with a certified test. Many Tennessee homes exceed the EPA’s action level of 4 pCi/L.
You Have a Crawl Space or Basement
Radon enters through soil-to-air contact. Homes with crawl spaces or basements—especially those without vapor barriers—have a direct pathway for radon to accumulate in living areas.
Buying or Selling a Home
Radon testing is now a standard part of real estate transactions in Tennessee. Sellers who test and mitigate in advance close deals faster and avoid last-minute renegotiations.
You’re in a Higher-Risk TN County
EPA Zone 1 and 2 counties in Tennessee—including Putnam, Cumberland, White, and Overton—have elevated geological radon potential. Proximity to granite formations increases risk.
You Haven’t Tested in Over 2 Years
Radon levels change over time as soil, home renovations, and seasonal conditions shift. EPA recommends retesting every 2 years even if a previous test came back low.
A Family Member Has Respiratory Issues
Radon exposure is linked to lung cancer, and the risk compounds over years of exposure. If anyone in your home has unexplained respiratory symptoms, radon testing is a critical first step.
What’s Included With Our Radon Services
Certified Short-Term Testing
EPA-protocol 48-hour closed-house radon test using certified charcoal canisters or continuous electronic monitors. Results are analyzed by a licensed lab with a full written report.
Long-Term Testing Option
For a more accurate picture of your year-round radon exposure, we offer 90-day alpha track detector testing. Recommended for buyers, sellers, and families with young children or elderly members.
Sub-Slab Depressurization System
The most effective mitigation method—a suction pipe is installed through the foundation and connected to an exterior fan that draws radon out from beneath the slab or crawl space before it enters the home.
Crawl Space Fan & Ventilation
For crawl space homes, sub-membrane depressurization (SMD) installs a fan system under the vapor barrier to vent radon gas outside before it rises through the floor above.
Post-Mitigation Testing
After installation, we perform a follow-up radon test to confirm your system is working and levels have dropped below the EPA action level of 4 pCi/L.
System Monitoring & Maintenance
All installed mitigation systems include a manometer (pressure gauge) for easy visual monitoring. We offer annual check-up service to verify fan operation and system integrity.
Our Simple 4-Step Process
From first test to certified mitigation — we protect your family quickly and thoroughly.
1
Free Inspection
Schedule your free on-site inspection. Our certified technician crawls the entire space, photographs issues, and gives you a full assessment.
2
Custom Plan & Quote
Within 24 hours, receive a detailed written quote with no hidden fees — itemized, transparent, and tailored to your specific situation.
3
Professional Installation
Our trained crew completes the work efficiently and cleanly — typically in one day — leaving your home in better shape than we found it.
4
Warranty & Follow-Up
Receive your warranty documentation and a complimentary 1-year follow-up inspection.
Why Homeowners Trust Cumberland Crawl Space
Upper Cumberland Experts
We’re a local Tennessee company — not a national franchise. We know the soil conditions, geology, and radon risk patterns of Upper Cumberland homes better than anyone.
NRPP-Certified Professionals
Our radon specialists are certified through the National Radon Proficiency Program (NRPP) — the highest standard for radon measurement and mitigation in the U.S.
Mitigation Effectiveness
We stand behind every mitigation system we install. If your post-mitigation radon level doesn’t drop below 4 pCi/L, we come back and fix the system at no additional cost.
Honest, Upfront Pricing
No bait-and-switch. No surprise add-ons. We provide itemized written quotes before any work begins. What you’re quoted is what you pay.
Fast Scheduling
Most testing appointments are available within 48 hours. Mitigation systems are typically installed within days of results being confirmed.
5-Star Rated Service
We have a 5.0 Google rating because we do the job right the first time. Our customers trust us with their family’s health — we take that responsibility seriously.
Frequently Asked Questions
The EPA recommends taking action if your radon level is at or above 4 pCi/L (picocuries per liter). Levels between 2–4 pCi/L are considered elevated; below 2 pCi/L is considered low risk. The national average indoor radon level is about 1.3 pCi/L. No level is technically ‘safe,’ but modern mitigation can reduce levels to well below 2 pCi/L in most homes.
Short-term testing takes 48 hours with the home closed as much as possible. Long-term alpha track tests run for 90+ days and give a more accurate annual average. Results from short-term tests are typically available within 3–5 business days of sending the canister to the lab.
Most radon mitigation systems in Tennessee range from $800 to $2,500 depending on the size and construction type of your home. Crawl space sub-membrane systems are generally at the lower end; complex slab homes or multi-entry-point systems are higher. We provide a free written quote before any work begins.
A vapor barrier alone can reduce radon levels somewhat by limiting soil-air contact, but it’s not a certified mitigation system. For homes testing above 4 pCi/L, a proper sub-membrane depressurization (SMD) system with a fan is required to meet EPA guidelines.
A properly installed mitigation system typically lasts 10–20+ years. The primary maintenance item is the radon fan, which has an average lifespan of 10–15 years. We recommend annual visual checks of the manometer gauge and a professional retest every 2 years to confirm the system is still effective.