Radon Comes from the Ground Beneath Your Home
Radon forms naturally in soil and rock as uranium breaks down. As this gas is released, it moves upward through the ground toward the surface. When a home sits above this process, radon can find its way inside through even the smallest openings.
Your home acts like a vacuum. As warm air rises and escapes through the roof, replacement air is pulled in from below. If radon is present in the soil beneath your foundation, it can be drawn inside along with that air.
This is why radon is most commonly found in basements and lower levels.
Common Entry Points for Radon Gas
Radon does not need large openings to enter a home. It can move through cracks and gaps that are often invisible to the homeowner.
Common radon entry points include:
- Cracks in concrete floors or foundation walls
- Sump pits and drainage systems
- Crawl spaces with exposed soil
- Floor drains
- Utility penetrations and pipe openings
- Construction joints and expansion seams
Even well-built, sealed homes can have elevated radon levels because radon travels through microscopic openings that are impossible to fully eliminate.
Why New Homes Can Have High Radon Levels
One of the biggest misconceptions about radon is that it only affects older homes. In reality, new homes can have equal or even higher radon levels.
Modern construction techniques often create tighter building envelopes, which:
- Improve energy efficiency
- Reduce natural air exchange
- Allow radon to become trapped indoors
Without proper mitigation, radon that enters a new home has fewer escape routes, making testing just as important as it is for older houses.
Why Neighboring Homes Can Test Very Differently
It is common for two homes on the same street to have completely different radon levels. This happens because radon is influenced by multiple factors, including:
- Soil composition beneath each home
- Foundation type and condition
- Home design and layout
- HVAC operation and airflow patterns
This is why online radon maps and general statistics can never replace testing your specific home.
How Weather and Seasons Affect Radon Levels
Radon levels can fluctuate throughout the year. During colder months, homes are sealed tighter and indoor air pressure differences increase, often leading to higher radon readings.
Rainfall, snow cover, and soil moisture can also influence how radon moves through the ground. These natural variations are one reason professional testing follows strict protocols to ensure accurate, reliable results.
Why Sealing Alone Is Not Enough
Many homeowners assume that sealing cracks or improving ventilation will solve a radon problem. While sealing can be helpful as a supporting measure, it is not a standalone solution.
Radon is persistent. If one pathway is sealed, the gas will often find another route inside. Effective mitigation requires controlling the pressure beneath the home so radon is redirected safely outside before it enters living spaces.
How Professional Mitigation Stops Radon at the Source
Radon mitigation systems work by creating a controlled pressure zone beneath the foundation. This prevents radon from entering the home by giving it an easier path to the outdoors.
Proper mitigation:
- Targets the source of radon entry
- Works continuously and automatically
- Does not rely on homeowner action
- Is customized to each home’s structure
This is why system design matters as much as installation.
Why Experience Matters in Northwest Indiana Homes
Homes in Northwest Indiana vary widely in age, construction style, and foundation type. From older basements to slab-on-grade and crawl space homes, no two properties are the same.
A+ Radon Solutions brings decades of local experience designing systems that work with regional soil conditions and home designs. Every mitigation system is engineered to address the unique airflow and foundation characteristics of the home.
This localized expertise leads to:
- More effective radon reduction
- Cleaner, more discreet installations
- Long-term system performance
What Comes Next in Our Radon Education Series
Understanding how radon enters homes explains why testing and mitigation must be done correctly. In the next part of our series, we will explain how radon testing works, what the numbers mean, and how to interpret results with confidence.
Radon may be invisible, but the solution begins with knowledge.
Take the Next Step Toward a Healthier Home
If you are unsure how radon may be affecting your home, professional testing is the best place to start. Understanding your home’s unique risk allows you to take informed, effective action.
A+ Radon Solutions is proud to help Northwest Indiana homeowners protect their homes through education, testing, and expert mitigation.