Basement Radon in Marietta
Sub-Slab Depressurization for Cobb County Basements
Many older Marietta homes have full basements. Professional mitigation draws radon from beneath your basement floor before it enters your living space.
Why Basements Have Higher Radon
Basements are particularly vulnerable to radon accumulation due to their construction and location.
Direct Soil Contact
Basement floors and walls are in direct contact with soil, providing multiple entry points for radon gas.
Negative Pressure
Basements often have lower air pressure than surrounding soil, drawing radon in through cracks and gaps.
Limited Ventilation
Finished basements may have reduced air exchange, allowing radon to accumulate to higher levels.
Foundation Cracks
Older Cobb County homes often have settlement cracks that provide easy pathways for radon entry.
Basement Mitigation Process
Assessment
We evaluate your basement construction, identify entry points, and determine optimal suction point locations.
Core Drilling
A 4-5 inch hole is drilled through the basement floor slab to access the gravel bed beneath.
Pit Creation
Material is removed beneath the slab to create a suction pit for effective radon collection.
System Installation
PVC piping connects the suction point to a radon fan that vents above the roofline.
Marietta Basement Homes
Many homes in established Marietta neighborhoods like East Cobb and areas near Kennesaw Mountain have full or partial basements. These homes, often built in the 1970s-1990s, may have settling cracks and other radon entry points that develop over time. Those same cracks can let in foundation moisture; if that has caused mold, our sister company Erase Mold provides Marietta basement mold removal.
Basement Radon FAQs
Why do basements have higher radon levels?
Basements are surrounded by soil on multiple sides, providing more surface area for radon entry. The stack effect in homes also draws soil gases upward into basement spaces.
Should I test my finished basement for radon?
Yes. Finished basements used as living space should always be tested. If you spend significant time in your basement, radon exposure matters just as much as in upper floors.
How does basement radon mitigation work in Marietta?
Most Marietta basements use sub-slab depressurization. We drill through the concrete floor, create a suction point, and install a fan system that draws radon from beneath the slab and vents it safely above your roof.
What about radon in my sump pit?
Sump pits are common radon entry points. We seal sump lids with airtight covers and may use the sump pit as a suction point or install a separate suction point nearby.
How much does basement radon mitigation cost in Marietta?
Basement systems in Marietta typically cost $1,000-$2,000 depending on basement size, number of suction points needed, and pipe routing complexity.
Will the system affect my finished basement?
We design systems to minimize visual impact. Pipes can often run through closets, utility areas, or along walls. Exterior routing is also an option.
Protect Your Basement
Contact us to discuss radon testing and mitigation for your Marietta basement.
Related Topics
Radon Testing
Test your basement before and after mitigation
Mitigation Systems
Sub-slab systems for Marietta basements
Mitigation Cost
Basement systems typically $1,000-$2,000
Crawl Space Radon
For homes with combination foundations
Slab Foundation
For homes without basements
Radon Safety Resources
Expert insights and guides to keep you informed
Radon Still High After Mitigation? Here Is Why, and What to Do
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Radon in Slab-on-Grade Homes: Why No Basement Does Not Mean No Radon
Slab-on-grade homes have no basement, which leads many metro Atlanta homeowners to assume they are safe from radon. They are not. Radon enters through slab cracks, control joints, and plumbing and utility penetrations directly into the living space. How radon gets into a slab home, why these homes still test high, how testing works, and how sub-slab depressurization mitigates a slab home.
Read more about Radon in Slab-on-Grade Homes: Why No Basement Does Not Mean No Radon →
Do Consumer Radon Monitors Work? Electronic Monitors vs Lab Test Kits
Consumer electronic radon monitors are great for ongoing awareness and trends, while lab-analyzed charcoal and alpha-track kits and professional tests are the standard for decisions like real estate. How accuracy, cost, and speed compare, and which to use when.
Read more about Do Consumer Radon Monitors Work? Electronic Monitors vs Lab Test Kits →