Radon Fundamentals
What radon is, how it forms, and why it can accumulate inside residential buildings.
StressFree Radon Testing | Consumer Education
The StressFree
Guide To Radon™
Measure. Understand. Decide.
A free 18-page educational resource created to help Michigan homeowners, buyers, sellers, and real estate professionals understand radon, testing methods, EPA guidance, and the decisions that follow.
18-Page Guide
Free PDF
Michigan Focused
Homeowner Education
Free educational download. No registration, appointment, or purchase required.
STRESSFREE RADON TESTING
THE CONSUMER
RADON GUIDE
RADON GUIDE
Clear facts. Reliable measurements. Confident decisions.
HOMEOWNER & REAL ESTATE RESOURCE
18 PAGES
01 — Learn
Understand what radon is
02 — Measure
Learn how testing works
03 — Understand
Interpret EPA guidance
04 — Decide
Evaluate appropriate next steps
Knowledge Before Decisions
What You Can't See Can Still Matter.
Radon is a naturally occurring radioactive gas that can enter homes through openings in foundations and accumulate indoors.
You cannot see, smell, or taste radon. The only way to determine the radon concentration in a home is through testing.
Long-term radon exposure increases lung cancer risk. The EPA identifies radon as the second leading cause of lung cancer in the United States.
Our guide explains the science, testing options, results, and practical considerations without unnecessary alarm.
- Understand the facts about radon.
- Learn when and why to test.
- Know what your results mean.
- Understand options when levels are elevated.
- Make more informed property decisions.
Whether you're researching your own home or helping a client evaluate a property, this resource is designed to make the next decision easier to understand.
Inside The Guide
18 Pages Of Practical Radon Education.
A comprehensive introduction to radon, designed to answer the questions homeowners and real estate professionals most frequently ask.
Health & Exposure
Understand long-term exposure concerns and the relationship between radon and lung cancer.
Radon Testing
Learn about short-term testing, long-term measurements, professional methods, and DIY test kits.
Understanding Results
Learn what pCi/L means, understand EPA action guidance, and evaluate possible next steps.
Michigan Real Estate
Explore testing considerations for buyers, sellers, agents, and property transactions.
Prevention & Follow-Up
Understand mitigation basics, post-mitigation testing, and ongoing monitoring.
Who This Guide Is For
Useful Information For Every Property Decision.
Whether you're maintaining a home or navigating a real estate transaction, understanding radon is an important part of environmental awareness.
HOMEOWNERS
Understand Your Indoor Environment.
Learn when testing is appropriate, how results are interpreted, and why periodic retesting may be recommended.
BUYERS & SELLERS
Make Informed Transaction Decisions.
Understand how radon testing fits into real estate due diligence, inspection periods, and potential mitigation discussions.
REAL ESTATE PROFESSIONALS
Share Reliable Educational Information.
Provide clients with a free educational resource explaining radon measurement, EPA guidance, and common testing questions.
Understanding Radon Measurements
What Do Radon Test Results Mean?
Radon concentrations are commonly reported in picocuries per liter (pCi/L). The EPA recommends fixing homes at or above 4.0 pCi/L and considering reduction between 2.0 and 4.0 pCi/L.
| Radon Level | EPA Guidance | What To Consider |
|---|---|---|
| Below 2.0 pCi/L | Below the range where EPA recommends considering reduction. | Keep your report and retest periodically or when conditions change. |
| 2.0 to below 4.0 pCi/L | EPA recommends considering radon reduction. | Evaluate the measurement and potential reduction options. |
| 4.0 pCi/L or Higher | At or above the EPA action level. | Follow applicable testing guidance and evaluate mitigation options. |
The EPA Action Level Is Not A Safety Boundary.
No radon concentration is completely risk-free. Lung cancer risk generally increases with concentration and duration of exposure.
A single short-term measurement may not represent a home's long-term average. Interpretation depends on the testing method, validity, and applicable protocol.
Elevated results should be evaluated according to the testing method and applicable guidance. A second test is not automatically required in every situation.
Have A Radon Test Result?
Understanding the number is only one part of interpreting a radon report. Measurement duration, test conditions, and method can also matter.
Michigan Radon Awareness
Why Michigan Homeowners Should Understand Radon.
Radon can occur in homes throughout Michigan, including Metro Detroit and Southeast Michigan communities.
Radon concentrations can vary significantly between neighboring homes. A nearby home's result cannot reliably determine the concentration in yours.
The EPA recommends testing homes for radon. Testing is especially relevant during property purchases, after significant renovations, and when evaluating an existing mitigation system.
Michigan does not generally require every seller to obtain a new radon test before a residential sale. However, applicable seller disclosure obligations may require known radon-related information to be disclosed.
Real estate disclosure obligations depend on the transaction and applicable Michigan law. This information is educational, not legal advice.
Before You Schedule Testing
Your Radon Testing Checklist.
A little preparation can help make the testing process more straightforward.
BEFORE THE APPOINTMENT
Prepare The Property.
- Confirm the property address and access arrangements.
- Identify any existing radon mitigation system.
- Provide previous radon reports if available.
- Communicate real estate deadlines when applicable.
- Follow building preparation instructions.
- Confirm who is authorized to receive the report.
AFTER RECEIVING RESULTS
Understand The Findings.
- Review the reported radon concentration.
- Confirm the testing method and measurement duration.
- Understand EPA action guidance.
- Review any documented testing limitations.
- Ask whether additional testing is appropriate.
- Consider mitigation and retesting when indicated.
Important Testing Preparation
Closed-Building Conditions May Be Required.
For many short-term radon tests lasting fewer than four days, EPA guidance calls for closed-building conditions for at least 12 hours before the test begins and throughout the measurement period.
Exterior windows and doors should remain closed except for normal entry and exit. Follow the testing professional's instructions regarding ventilation, heating, cooling, and other equipment.
Do not move, unplug, cover, or otherwise interfere with the testing device. Do not deliberately change building conditions to influence the result.
Requirements can vary by test type, duration, and applicable protocol. Always follow the instructions provided for your particular test.
Buyers | Sellers | Real Estate Professionals
Radon Testing During A Real Estate Transaction.
Radon testing can be an important part of property due diligence. Scheduling should account for inspection deadlines, property access, testing conditions, and report delivery.
01 — Schedule Early
Communicate the inspection period, anticipated closing date, and any contractual deadlines before arranging testing.
02 — Allow Measurement Time
Many short-term professional measurements require at least 48 hours of testing. Access, preparation, placement, and retrieval also require planning.
03 — Plan For Reporting
A 48-hour measurement is not a guaranteed 48-hour turnaround. Confirm report expectations and authorized recipients before the appointment.
If a result indicates elevated radon, buyers and sellers may need time to review findings, evaluate mitigation options, or discuss contractual next steps.
StressFree provides radon testing and reporting, not legal representation or mitigation installation.
If Radon Levels Are Elevated
Elevated Radon Does Not Mean You're Out Of Options.
Radon mitigation systems can often substantially reduce indoor radon concentrations.
A common approach uses a fan and piping to draw radon-containing soil gas from beneath a foundation and discharge it outdoors.
The appropriate system depends on the building's foundation, construction, and other conditions.
After installation, testing is necessary to verify that the system is reducing radon concentrations as intended.
StressFree Radon Testing focuses on radon measurement and reporting. We do not install mitigation systems.
Frequently Asked Questions
Answers To Common Radon Questions.
Is the Consumer Radon Guide really free?
Yes. The 18-page guide is a free educational resource available to homeowners, buyers, sellers, and real estate professionals. No appointment or purchase is required.
Can I share the PDF with my clients?
Yes. Real estate professionals are welcome to share the guide with clients for educational purposes. Please retain the StressFree branding and original source attribution.
Does every home need radon testing?
The EPA recommends that homes be tested for radon because concentrations cannot be predicted reliably from appearance, age, or neighboring properties.
How long does a radon test take?
Many short-term radon tests require a measurement period of at least 48 hours. The actual duration depends on the method and protocol.
Scheduling, placement, retrieval, and reporting require additional time.
Do I need to keep my windows closed?
For many short-term tests lasting fewer than four days, closed-building conditions are required for at least 12 hours before testing and during the measurement period.
Follow the specific preparation instructions for your test. Normal entry and exit are generally permitted.
What is considered an elevated radon level?
The EPA recommends taking action to reduce radon at or above 4.0 pCi/L and considering reduction between 2.0 and 4.0 pCi/L.
Does an elevated result always require a second test?
Not necessarily. The appropriate next step depends on the testing method, measurement validity, and applicable protocol.
Some real estate testing methods can provide a basis for decisions without automatically requiring a second measurement.
Can radon be reduced in an existing home?
Yes. Qualified mitigation professionals can often reduce indoor radon concentrations using appropriately designed systems.
Does StressFree install mitigation systems?
No. StressFree's radon service focuses on testing and reporting, not mitigation system installation.
Does Michigan require a radon test before every home sale?
Michigan does not generally require every residential seller to obtain a new radon test. However, disclosure obligations involving known radon-related conditions may apply to particular transactions.
Can I schedule professional testing after reading the guide?
Yes. Visit our Radon Testing page or submit a testing request. Scheduling, availability, and pricing are confirmed before an appointment is booked.
Trusted Information Sources
Learn From Authoritative Resources.
Our consumer education draws on established radon guidance from the U.S. Environmental Protection Agency and Michigan's environmental agencies.
U.S. ENVIRONMENTAL PROTECTION AGENCY
EPA Radon Information
Learn about radon exposure, testing recommendations, and mitigation guidance.
MICHIGAN EGLE
Michigan Indoor Radon Program
Explore Michigan-specific radon information and homeowner education.
STRESSFREE RADON TESTING
Local Radon Testing Services
Learn about professional radon testing for Michigan homeowners and real estate transactions.
Ready To Take The Next Step?
Knowledge Is The First Step. Testing Provides The Answers.
The StressFree Consumer Radon Guide helps you understand the issue. A property-specific radon test helps you understand your home.
Whether you're buying, selling, or simply checking your indoor environment, StressFree can help you begin the testing process.
