Aqua Lock has been installing radon mitigation systems for Louisville homeowners since 2006. Family-owned by Jay and Becky Kraft, headquartered at 10470 Bluegrass Parkway in Jeffersontown. Radon Certified, BBB Accredited with an A+ rating, and every radon fan installation is backed by our 5-year warranty.
Why Louisville Homes Have Radon
Radon is a naturally occurring radioactive gas that comes up through the soil and collects in basements, crawl spaces, and the lower levels of homes. You cannot see it, smell it, or taste it. It is the second leading cause of lung cancer in the United States after smoking, per the EPA.
Louisville has a specific radon problem:
- Most of Jefferson County is in EPA Radon Zone 1 (the highest-risk zone), where the average indoor radon level is predicted to be above the EPA action threshold of 4.0 pCi/L.
- Limestone karst geology under parts of the county creates pathways for radon to migrate through the soil and into homes more easily than in non-karst regions.
- Older Louisville housing stock often has cracked or unsealed foundation slabs that let radon enter freely.
- Basement living is common in this region (finished basements, basement bedrooms, home offices below grade), which means homeowners spend hours per day in the part of the house where radon concentrates.
- A damp crawl space pushes moisture upward through the floor and into the rest of the house. That is where the musty smell, the high indoor humidity, the cold floors, and the wood rot all come from.
If your house has not been tested, it is worth testing. If your test came back above 4.0 pCi/L, mitigation is the standard response.
Our Radon Mitigation Services in Louisville
Aqua Lock uses the radon mitigation technique that matches the construction of your home and the layout of your foundation:
Active soil depressurization (ASD)
The standard system. A PVC pipe is installed through the slab or sump pit, connected to an in-line fan that vents radon up through the roof. The fan creates negative pressure under the slab, pulling radon out before it can enter the home. Backed by our 5-year fan warranty.
Sub-slab depressurization
A variation of ASD for homes with a slab-on-grade foundation. The pipe is installed directly through the slab to draw radon from the soil below.
Crawl space depressurization with membrane
For homes with crawl spaces instead of full basements. A sealed membrane is installed across the crawl space floor, with the fan pulling air from underneath the membrane.
Sealing and complementary work
Foundation cracks, sump pit covers, floor-wall joints, and other entry points are sealed during the installation to make the system more effective.
Post-mitigation testing
After the system runs for at least 24 hours, we recommend a follow-up radon test to confirm levels are below the EPA action threshold. We can coordinate the retest.
System monitoring
A manometer (U-tube pressure gauge) is installed on the pipe so you can check at a glance that the fan is still pressurizing the system. If the pressure drops, the fan needs service or replacement.
The right configuration depends on whether you have a basement, crawl space, or slab-on-grade home, and where the radon is actually entering.
Signs You Need Radon Mitigation
Unlike water damage or foundation cracks, radon has no visible signs. You only know if you test. Here is when mitigation makes sense:
- Your radon test came back at 4.0 pCi/L or higher (EPA action level)
- Your radon test came back at 2.0–3.9 pCi/L and you have a young family, a smoker in the home, or you spend significant time in the basement
- You are buying or selling a Louisville home and a buyer inspection flagged radon
- You are planning to finish your basement and use it as living space
- A neighbor's home tested high. Radon levels often cluster geographically because soil conditions are similar
If you have not tested, short-term test kits are inexpensive and widely available. We can also recommend a certified independent tester for real estate transactions.
Why Louisville Homeowners Choose Aqua Lock for Radon Mitigation
“Our competitors often only quote the maximum, most expensive scope for Foundation Work, because they see it as easy money. We built Aqua Lock to do the opposite. Every inspection ends with options and education, not just a single price tag for the most expensive solution.”
Jay Kraft, Co-Owner
- In business since 2006.
- 10,000-plus Kentucky homes repaired.
- Radon Certified: we hold the certification required to design and install radon mitigation systems.
- 5-year warranty on the radon fan.
- BBB Accredited with an A+ rating.
- Family-owned and operated by Jay and Becky Kraft.
- No subcontractors. Every job is handled by trained Aqua Lock employees.
What Louisville Homeowners Are Saying About Our Radon Work
Two real Aqua Lock radon mitigation reviews from Louisville-area customers.
Read More Reviews
How a Louisville Radon Mitigation Job Goes
- Call 502-495-9450 If you have a recent radon test result, have it handy. Most Louisville inspections are scheduled within 24 to 48 hours.
- Free in-home inspection A trained Aqua Lock installer walks your basement or crawl space with you, identifies where radon is entering, and explains which mitigation configuration fits your house. 30 to 45 minutes, no obligation.
- Written scope and price before you decide anything. Most Louisville radon mitigation systems are installed in a single day.
- Installation typically a one-day job Pipe routed through the slab or pit, fan installed in a non-living area (garage, attic, or exterior) pipe vented above the roofline, foundation cracks sealed, system tested. Final walkthrough with you before payment.
Another Louisville Homeowner Shares Their Radon Experience
One Louisville homeowner shared what a radon job looks like when the situation is more complicated than typical.
Lauri, Louisville
7 months ago
“2025: Hired, again, Aqua Lock for Radon Mitigation for our home with a crawl space which contained a lay-down furnace. Complicated. The Crew (AJ, Seth, Eric and Fito) arrived on time, very professional, managed the complicated situations quickly and with humor. AJ explained all aspects of the mitigation system, including ensuring the electrician would arrive prior to work completion to turn the system on. Seth showed me the finished work through a series of photos and provided follow up processes with additional radon testing. Again, Thank you, Aqua Lock.”
Frequently Asked Questions
How much does radon mitigation cost in Louisville?
Most Louisville radon mitigation installations fall between $1,000 and $1,800, depending on the configuration of your home, where the pipe needs to be routed, and how many entry points need sealing. Aqua Lock gives you a written scope and price before you decide anything.
Does the radon system make noise?
The fan runs continuously and produces a low hum, about as loud as a refrigerator. We locate the fan in a non-living area (garage, attic, or exterior wall) so you do not hear it from inside the house. The exhaust pipe extends above the roofline so the vented air is not at ground level near windows or doors.
How long until the system reduces radon levels?
Most systems reduce indoor radon below 4.0 pCi/L within 24 to 48 hours of being turned on. We recommend a follow-up radon test 30 days after installation to confirm the long-term reduction.
How long does the fan last?
Radon fans typically last 5 to 10 years. Ours is backed by a 5-year warranty. When the fan needs replacement, it is a quick job that does not require redesigning the system.
Will radon mitigation help with home resale?
Yes. Radon disclosure is part of most Kentucky real estate transactions. A documented, professionally installed radon mitigation system is a positive signal at sale and can resolve buyer concerns from a pre-purchase inspection. The Kimberly Rosenblatt review above is from a Realtor who used our work to keep a closing on track.
Schedule Your Free Louisville Radon Inspection
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