Slab Foundation Radon in Marietta
Sub-Slab Depressurization for Cobb County Homes
Many newer Marietta homes are built on concrete slab foundations. We install sub-slab systems that effectively remove radon from beneath your home.
How Radon Enters Slab Foundations
Concrete slabs may appear solid, but they have multiple pathways where radon can infiltrate your Marietta home.
Shrinkage Cracks
As concrete cures and settles, hairline cracks develop that allow radon to seep through the slab.
Control Joints
Intentional grooves in slabs designed to control cracking become pathways for radon entry.
Utility Penetrations
Gaps around plumbing pipes, electrical conduits, and HVAC lines passing through the slab.
Slab-Wall Gaps
The perimeter where concrete meets foundation walls often has small gaps that allow radon infiltration.
Sub-Slab Installation Process
Site Evaluation
We assess your slab construction, soil conditions, and identify optimal suction point locations.
Core Drilling
A 4-5 inch hole is drilled through the concrete slab to access the sub-slab material.
Suction Pit
Material is excavated beneath the slab to create a suction pit for effective depressurization.
System Install
PVC piping connects the suction point to a fan that vents radon above the roofline.
Common in Cobb County New Construction
Slab-on-grade foundations are popular in newer Marietta subdivisions. Many homes built after 2000 in areas like West Cobb and along the Dallas Highway corridor feature slab construction. These homes are ideal candidates for sub-slab depressurization.
Slab System Advantages
Single Suction Point
Most Marietta slab homes only need one suction point for effective radon reduction.
Hidden Routing
Piping can run through garages, closets, or along exterior walls for minimal visibility.
Quick Installation
Slab systems are typically installed in a single day with minimal disruption.
High Effectiveness
Sub-slab depressurization achieves 90-99% radon reduction in most homes.
Foundation Comparison for Marietta
| Feature | Slab Foundation | Crawl Space | Basement |
|---|---|---|---|
| Mitigation Method | Sub-Slab | Sub-Membrane | Sub-Slab |
| Typical Cost | $900 - $1,800 | $1,000 - $2,200 | $1,000 - $2,000 |
| Installation Time | 3-5 hours | 4-8 hours | 4-6 hours |
| Common In Marietta | Newer subdivisions | Throughout Cobb | Older homes |
Slab Foundation Radon FAQs
How does sub-slab depressurization work?
A hole is drilled through your concrete slab to create a suction point. A fan creates negative pressure beneath the slab, drawing radon out through PVC piping and venting it safely above your roofline before it can enter your home.
Will drilling through my slab cause damage?
No. The 4-5 inch core-drilled hole doesn't affect structural integrity. The pipe is properly sealed into the slab, creating an airtight connection. We've installed hundreds of systems in Cobb County homes without issues.
How much does slab radon mitigation cost in Marietta?
Slab foundation systems in Marietta typically cost $900-$1,800 depending on home size, number of suction points needed, and pipe routing complexity. Most homes fall in the $1,000-$1,400 range.
Are slab foundation homes at higher radon risk?
Not necessarily. Slab homes have direct ground contact but no below-grade living space. Radon risk depends more on local geology than foundation type. Cobb County's granite bedrock produces radon regardless of foundation.
Where does the radon system pipe go?
We route the pipe through the most discreet path: interior closet, garage, or exterior wall. The fan is typically installed in the attic or on the exterior, and the pipe exhausts above the roofline.
How do I know the system is working?
Every system includes a u-tube manometer that shows the fan is creating suction. We also perform post-installation testing to verify radon levels are reduced below 4.0 pCi/L.
Protect Your Slab Foundation Home
Contact us for a free quote on slab foundation radon mitigation in Marietta.
Radon Safety Resources
Expert insights and guides to keep you informed
An Orange Cat Went Viral for Detecting Radon Gas - Here's What Every Homeowner Should Know
A Reddit post with 36,000+ upvotes tells the story of a senior orange cat whose bizarre behavior turned out to be a life-saving warning about dangerous radon gas levels. The internet loved it, but the science behind it is dead serious.
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Why Radon Testing Is Essential: Complete Guide for Homeowners & Buyers
Radon causes more deaths than drunk driving, house fires, and carbon monoxide combined. Learn why radon testing should be part of every home purchase and ownership plan, understand the health risks, and discover how to protect your family.
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How Radon Mitigation Systems Work: Complete Technical Guide
Learn exactly how radon mitigation systems achieve 95-99% reduction rates. Understand sub-slab depressurization, system components, installation process, costs, and what to expect from professional radon mitigation.
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