Basement radon mitigation system installed in Atlanta GA home

Basement Radon in Atlanta

Why Basements Have Higher Radon & How to Fix It

Basements often have higher radon levels than upper floors. Professional mitigation can help reduce these levels.

Why Basements Have Higher Radon Levels

Your basement is where radon naturally concentrates due to its below-grade location and direct contact with soil.

Direct Soil Contact

Basements have more surface area in contact with soil where radon originates, providing more entry points.

Pressure Differentials

Basements are often under negative pressure relative to the soil, drawing radon-laden air inside.

Stack Effect

Warm air rising in your home creates suction at the lowest level, pulling soil gases including radon into the basement.

Foundation Cracks

Settling and age create cracks in basement floors and walls that serve as radon entry pathways.

Common Basement Radon Entry Points

Cracks in concrete floor slab
Gaps around pipes and wiring
Floor-wall joints (cove joints)
Exposed soil in sump pits
Porous concrete blocks
French drains and drain tiles
Settlement cracks in walls
Mortar joints in stone foundations

Sealing these entry points alone is not sufficient to reduce radon. While sealing is part of our process, active soil depressurization is required to effectively reduce radon levels.

Basement Radon Mitigation Process

1

Assessment

We evaluate your basement's construction, identify entry points, and determine the optimal system design.

2

Installation

A suction point is created through the basement floor. PVC piping routes from beneath the slab to above the roofline.

3

Fan Activation

A radon fan creates negative pressure beneath your basement floor, drawing radon away before it enters.

4

Verification

Post-installation testing can confirm the system is working effectively.

Atlanta Basement Radon Facts

Zone 1
Atlanta's EPA radon classification (highest risk)
2-3x
Higher radon in basements vs. upper floors
Effective
Professional mitigation available

Basement Radon FAQs

Why do basements have higher radon levels?

Basements have more direct contact with soil and are typically under negative pressure relative to the ground. This combination allows radon to easily enter through floor and wall cracks.

Should I test my basement even if I don't use it?

Yes. Radon can migrate from basements to upper floors through HVAC systems, stairwells, and floor penetrations. Even unused basements can affect whole-home air quality.

Can I finish my basement if it has high radon?

Yes, but addressing radon first is recommended. Installing a radon system before finishing is often easier. It also helps ensure your finished basement has lower radon levels.

How much does basement radon mitigation cost in Atlanta?

Basement radon systems in Atlanta typically cost $1,200-2,000. Costs vary based on basement size, foundation type, and system complexity. Contact us for a quote.

Do sump pumps increase radon levels?

Sump pits can be radon entry points if unsealed. Airtight sump covers can help address this pathway while maintaining pump function.

How is basement radon mitigation done?

A common method is sub-slab depressurization. This involves drilling through the basement floor, installing a suction point in the gravel bed below, and using a fan to draw radon out through PVC piping that vents above the roof.

Address Basement Radon Today

Contact us to discuss your basement radon levels and mitigation options.

Related Topics

Mitigation Systems

Sub-slab depressurization for basement foundations

Mitigation Cost

Basement systems typically $1,000-$2,000

Crawl Space Radon

Solutions for combination foundation homes

Slab Foundation

Similar sub-slab approach for slab homes

Radon Testing

Test your basement for radon levels

Health Risks

Basement radon exposure and lung cancer risk

Radon Safety Resources

Expert insights and guides to keep you informed

View All Posts →
Commercial Radon Disclosure and Landlord Liability in Georgia
Commercial & MultifamilyJune 30, 2026

Commercial Radon Disclosure and Landlord Liability in Georgia

Georgia has no radon mandate and no radon-specific disclosure law, but once a landlord is on notice a duty of care exists. Why documenting a test and any mitigation is the defensible response to a tenant inquiry, plus lease and risk-management considerations. General information, not legal advice.

Read more about Commercial Radon Disclosure and Landlord Liability in Georgia
Why a Missing or Late Radon Report Can Delay Your Commercial Closing
Commercial & MultifamilyJune 28, 2026

Why a Missing or Late Radon Report Can Delay Your Commercial Closing

When a loan program or lender requires radon testing, a missing, late, or elevated result can hold up a commercial or multifamily closing. Why it happens and how to keep radon from delaying your deal.

Read more about Why a Missing or Late Radon Report Can Delay Your Commercial Closing
ANSI/AARST Radon Standards Explained: The Protocols Lenders Expect
Commercial & MultifamilyJune 26, 2026

ANSI/AARST Radon Standards Explained: The Protocols Lenders Expect

A plain-language guide to the ANSI/AARST radon standards that lenders and programs reference: the multifamily and large-building measurement standard (MA-MFLB-2023) and the new-construction soil-gas control standard (CC-1000), and why they matter when you hire a tester.

Read more about ANSI/AARST Radon Standards Explained: The Protocols Lenders Expect