Does sealing cracks really stop radon?

Yes. Cracks in the foundation are one of the most common entry points for radon gas. Sealing them doesn’t solve the whole problem on its own, but it’s an important part of a complete mitigation system.

Will sealing cracks fix the structure of my foundation?

No. Crack sealing is not a structural repair. It’s designed to block radon and moisture entry, not to reinforce the foundation. For structural issues, a foundation contractor may be needed.

How long does foundation crack sealing last?

We use flexible, professional-grade sealants that are made to move with your concrete as it expands and contracts. When applied correctly, they provide long-lasting protection.

Do all cracks need to be sealed?

Not every cosmetic crack needs sealing, but any crack that penetrates through the concrete can allow radon inside. During inspection, we identify which cracks should be sealed for the best protection.

Is sealing cracks enough to lower radon levels?

In most homes, sealing alone won’t bring radon levels down to safe levels. It works best as part of a full mitigation system, such as sub-slab depressurization, to ensure long-term safety.

Foundation Crack Sealing

Stop Radon at the Source

Foundation cracks are one of the most common ways radon gas enters a home. Even small hairline cracks in concrete can create a direct pathway for radon, moisture, and soil gases to seep indoors. Sealing these cracks is a critical step in protecting your family’s health and keeping your mitigation system working at peak performance.

Why Foundation Cracks Matter

Concrete foundations are designed to be strong and long-lasting, but over time natural settling, shrinkage, or soil pressure can cause cracks to form. While most cracks don’t threaten the structural stability of your home, they do compromise your indoor air quality. Think of a crack like an open window in your basement floor — invisible to the eye, but constantly letting radon and damp air inside.

Radon is an odorless, invisible gas that can build up to dangerous levels if left unchecked. By sealing foundation cracks, you’re closing those hidden entry points before they can affect your home.

Our Sealing Process

At BreatheWell Radon Solutions, we use professional-grade sealants designed specifically for radon mitigation. These materials are flexible and durable, allowing them to move with your foundation as it naturally expands and contracts. The result is a long-lasting, airtight seal that keeps radon where it belongs — outside.

Our process typically includes:

Inspection: We identify all visible cracks in basement floors, walls, and slab joints.
Preparation: Cracks are cleaned and prepped to ensure maximum adhesion.
Sealing: Specialized radon-resistant sealants are applied to fill and close gaps.
Integration: Sealing is often combined with other mitigation strategies, such as sub-slab depressurization, to maximize effectiveness.

Benefits of Foundation Crack Sealing

Blocks radon entry points before they cause harm
Reduces moisture and musty odors in the basement
Helps your mitigation system run more efficiently

Adds an extra layer of protection for your family’s health

Take the First Step Toward Safer Air

If your foundation has cracks — even small ones — now is the time to act. Sealing those openings is an affordable, effective way to stop radon at its source and improve the air your family breathes every day.

BreatheWell Radon Solutions makes it simple. Call today to schedule your foundation crack sealing service and take control of your home’s air quality.

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Foundation Crack Sealing FAQ

Does sealing cracks really stop radon?
Yes. Cracks in the foundation are one of the most common entry points for radon gas. Sealing them doesn’t solve the whole problem on its own, but it’s an important part of a complete mitigation system.
Will sealing cracks fix the structure of my foundation?
No. Crack sealing is not a structural repair. It’s designed to block radon and moisture entry, not to reinforce the foundation. For structural issues, a foundation contractor may be needed.
How long does foundation crack sealing last?
We use flexible, professional-grade sealants that are made to move with your concrete as it expands and contracts. When applied correctly, they provide long-lasting protection.
Do all cracks need to be sealed?
Not every cosmetic crack needs sealing, but any crack that penetrates through the concrete can allow radon inside. During inspection, we identify which cracks should be sealed for the best protection.
Is sealing cracks enough to lower radon levels?
In most homes, sealing alone won’t bring radon levels down to safe levels. It works best as part of a full mitigation system, such as sub-slab depressurization, to ensure long-term safety.