May is National Home Improvement Month, the perfect time to tackle that renovation checklist. But while most homeowners are focused on new flooring, fresh paint, or a kitchen upgrade, one invisible threat often gets overlooked: radon gas. This article explains why radon testing belongs on every home improvement to-do list, what the EPA says about safe exposure levels, and how modern radon detectors make protecting your family's indoor air quality simpler than ever.

Quick Answer: Why Should Radon Testing Be Part of Home Improvements?

Home renovations can unintentionally affect indoor radon levels by changing airflow, insulation, ventilation, and pressure dynamics, especially in lower levels of a home. Projects such as basement finishing, energy-efficiency upgrades, HVAC modifications, and home additions may increase radon concentration. Testing before and after renovations helps homeowners identify potential risks early and maintain healthier indoor air quality throughout the year.

What Is Radon and Why Should Homeowners Care?

Radon is a naturally occurring, colorless, odorless, tasteless radioactive gas. It forms from the natural breakdown of uranium in soil, rock, and water. Because you cannot see it, smell it, or taste it, most families have no idea whether their home has a radon problem until they test. And the numbers are sobering: according to the U.S. Environmental Protection Agency (EPA), radon is the leading cause of non-smoking lung cancer among non-smokers in the United States, responsible for approximately 21,000 deaths each year. 

Approximately 1 in every 15 U.S. homes has elevated radon levels, including new builds and older homes alike. Radon enters through cracks in foundations, gaps around service pipes, construction joints, and even well water. No region is immune—every state has homes with radon levels above the EPA’s recommended action level.

The Connection Between Home Improvement and Radon Risk

Here is something many homeowners do not realize: certain home improvements can actually change your home's radon levels, sometimes dramatically.

Renovations That Can Affect Radon Gas Levels

• Finishing a Basement or Lower Level: Converting an unfinished basement into a livable space, such as a guest bedroom, home office, or playroom, means spending more time in the part of the home closest to the ground. Since radon seeps up from the soil, basement and ground-floor levels typically have the highest concentrations. More time in that space means greater potential exposure.

• Sealing Gaps and Improving Insulation: Energy efficiency upgrades such as spray foam insulation, weather stripping, and window sealing are excellent for reducing utility bills. However, a more tightly sealed home also means less natural air exchange, which can cause radon gas to accumulate at higher concentrations than in a less-sealed structure.

• Adding HVAC Systems or Making Ductwork Changes: Changes to how air circulates through your home can influence how radon moves and concentrates in different rooms.

• New Construction or Additions: If you are adding a room, building an addition, or constructing a new home, the EPA recommends incorporating radon-resistant construction techniques and testing as soon as the space is occupied.  Pro Tip: It’s recommended to test both new and old sections of the house to ensure the "joint" hasn't created a new entry point for radon gas.

The Bottom Line: Any time you meaningfully change your home's structure, ventilation, or the amount of time your family spends in lower-level spaces, radon testing should follow.

What the EPA Says About Radon Levels

Radon levels are measured in picocuries per liter(pCi/L) of air. Here is how the EPA frames the risk:

• 4 pCi/L or higher: The EPA recommends taking action to reduce radon levels. At this concentration, exposure is roughly equivalent to smoking 8 cigarettes a day.

• Between 2–4 pCi/L: The EPA encourages homeowners to consider to fix home, since there is no known "safe" level of radon exposure.

• Below 2 pCi/L: Levels are generally considered normal, but it's recommended to retest every 2 to 5 years.

The EPA and Surgeon General recommend that all homes in the United States be tested for radon regardless of age, location, or foundation type. Radon risk is not limited to older homes or designated high-risk zones.

How Radon Testing Fits Into Your Home Improvement Safety Plan

Think of radon testing as part of your home improvement safety checklist alongside smoke detectors, carbon monoxide alarms, and routine system inspections. It is not a one-time box to check; it is an ongoing layer of protection.

Step 1: Test Before You Renovate

If you are planning a renovation that affects the lower levels of your home, test for radon beforehand. Knowing your baseline levels gives you critical information to make smart decisions about the renovation itself, including whether to incorporate radon-resistant features.

Step 2: Test After Completion

Once your renovation wraps up, test again. Any significant structural changes can alter how radon moves through your home. A post-renovation test confirms whether your indoor air quality has changed and gives you peace of mind before the family starts enjoying the new space.

Step 3: Monitor Continuously

Radon levels are not static. They fluctuate throughout the day, across seasons, and in response to weather patterns, changes in ventilation, and even daily activities like opening windows. A single short-term test captures just one moment in time. Continuous monitoring gives you the full picture.

Modern radon technology has made this easier than ever. Instead of relying on mail-in test kits and delayed lab results, today’s smart radon detectors provide real-time readings, hourly updates, and long-term trends, all accessible from your smartphone.

Smart Home Technology Is Changing Indoor Air Monitoring

Modern homeowners increasingly use connected devices to monitor energy usage, home security, humidity, and indoor temperature. Radon monitoring is now becoming part of that same smart home ecosystem.

Today’s digital radon detectors provide real-time indoor air quality insights, smartphone connectivity, trend tracking, and automated alerts that make long-term monitoring easier and more practical for everyday homeowners.

For families focused on healthier indoor environments, smart radon monitoring adds another layer of visibility and peace of mind.

Choosing the Right Radon Detector for Your Home 

Not all radon detectors are created equal. If you are investing in your home this May, it is worth understanding what separates a high-quality radon detector from a basic one.

What to Look for in a Radon Detector

• Detection Technology: The gold standard for consumer radon monitoring is ion chamber technology. Unlike passive electret or alpha-track devices, ion chamber detectors actively measure radon levels in real time with laboratory-grade accuracy.

• Speed of Results: Traditional charcoal canister tests take days to weeks for lab analysis. A high-quality digital radon detector should deliver an initial reading within minutes and reliable results within hours, not weeks.

• Continuous Monitoring: Because radon levels fluctuate, a detector that only gives you a single average reading can miss important peaks. Look for continuous monitoring with detailed data, such as hourly or even 10-minute intervals.

• App Connectivity: The best modern radon detectors connect to a smartphone app, allowing you to track trends over time, receive alerts when levels rise, and share data with family members or professionals from anywhere.

• Certification: For peace of mind, look for devices that have been independently tested and certified, or validated by recognized third-party laboratories.

Ecosense: Built for Accuracy and Confidence

Since 2019, Ecosense has focused on advancing smart radon monitoring technology, making radon detection faster, more accurate, and easier for homeowners. Our lineup,  including EcoQube, EcoQube Flex, EcoBlu, and RadonEye, is built on patented ion chamber technology designed for highly sensitive and responsive radon measurement.

EcoQube, for example, can deliver an initial radon reading in as little as 10 minutes, helping homeowners begin evaluating indoor air quality much faster than traditional testing methods. Over time, the device continues tracking radon fluctuations to provide a clearer picture of long-term exposure trends inside the home.

The monitor connects to a Wi-Fi network and syncs with the EcoQube mobile app, allowing users to review readings remotely and monitor changes over time. Color-coded indicators on the device also make readings easy to interpret at a glance. 

EcoQube Flex expands monitoring flexibility with a portable, battery-powered design that allows users to test multiple rooms and compare radon levels throughout the home more conveniently. This flexibility is especially useful during renovations or when evaluating air quality across different living spaces.

For families focused on healthier indoor environments, Ecosense monitors support long-term trend analysis, historical reporting, and ongoing radon tracking, providing more than a one-time snapshot. They help homeowners better understand how indoor air quality changes over time.

What to Do If Your Radon Levels Are High 

High radon levels can be concerning, especially when a digital monitor displays a "Fix Your Home" warning. While short-term spikes are often driven by environmental factors like heavy rain, snow cover, or drops in barometric pressure, it is important to ensure your home remains safe.

This guide offers practical tips for homeowners on how to respond quickly when radon levels rise.

Five Tips for a Radon-Aware Home Improvement Season

Here are five practical steps to integrate radon awareness into your May home improvement plans:

1. Test Before You Renovate: Establish a baseline radon level before any significant structural work begins.

2. Incorporate Radon-Resistant Features During New Construction or Additions: Ask your contractor about passive radon-resistant techniques, which are relatively low-cost during construction but more expensive to add later. 

3. Upgrade from a One-Time Test to Continuous Monitoring: If you have only used a charcoal canister, consider a smart radon detector that gives you real-time data year-round.

4. Place Your Detector in the Right Location: The EPA recommends testing in the lowest livable area of your home, typically the basement or ground floor. Place the detector at least 20 inches above the floor, away from windows, vents, and direct airflow.

5. Share What You Learn: Talk to neighbors, family members, and friends about radon. Awareness is still surprisingly low, and a simple conversation could genuinely save a life.