7 Subtle Signs Your Edmonton Home Might Have High Radon Levels

Edmonton is built on unique geology, which, along with other factors, can create a danger most people don’t realize is there — Radon gas. Unfortunately, this naturally occurring radioactive gas can seep into homes from the ground beneath them, posing serious health risks. Because radon is invisible and odorless, it cannot be detected without specialized testing equipment. However, certain conditions in your home may indicate elevated radon levels. In this blog, I intend to highlight how Radon enters buildings and seven signs to watch for in an Edmonton house that may indicate a problem.

Invisible Intruder: Understanding High Radon levels Edmonton

Radon gas becomes dangerous when it accumulates indoors. It can enter any building through gaps and cracks in floors, walls, and around pipes, drains, and sumps – even some building materials are porous enough to allow its passage. Once inside a property, Radon doesn’t travel far; being heavier than air, it tends to settle in lower rooms, such as cellars and basements. 

7 Warning Signs that your Home Might Have High Radon levels Edmonton

The 7 warning signs for High Radon levels Edmonton are as follows:

Sign 1: Persistent Dampness or Mold in Basements

Many homeowners notice dampness or a musty smell in their basements before anything else—and for good reason. These areas often provide easy entry points for radon gas.

Sign 2: New Construction or Upgraded Basements May Have High Radon levels Edmonton

Surprisingly, new constructions and renovated basements may have elevated Radon levels compared to older homes. This is usually because modern construction uses building techniques that improve energy conservation, i.e., sealing homes very well. 

Sign 3: Homes with Sump Pumps or Foundation Cracks

This sign is more straightforward. Radon gas can enter your basement through sump pump pits, foundation cracks, gaps around pipes, and small openings in the floor. Even tiny cracks in the foundation can allow radon to seep into your home.

Sign 4: Interiors that Don’t Let Air Flow Properly

If your home has poor ventilation, radon can remain trapped indoors for longer periods because there is not enough airflow to disperse it. This could be an issue if there are few exhaust fans, a central heating and cooling system that only recirculates existing indoor air, or simply not enough vents open throughout.

Sign 5: Near High-Risk Zones

Certain areas of Edmonton are naturally more prone to elevated radon levels because of local soil and geological conditions. If your home is located in a known high-risk zone, testing becomes especially important.

Sign 6: Sealed Basement Slab Without Crawl Space

Some may refer to this as "squeezed" or "sealed" floors. There are still other types called “sealed,” but these usually allow more movement & circulation than one that is completely closed at the bottom; they do nothing but lie flat all over —on earth, surrounding its construction site—and contain air. A crawl space under the house, even when it contains Radon, allows this gas to move a bit more easily than a totally enclosed space below ground level. 

Sign 7: Elevated Readings from Previous Neighboring Properties

There is no doubt that the likelihood of having Radon in your home increases if your neighbors have already found High Radon levels Edmonton. 

Testing Your High Radon levels Edmonton: Your Essential First Step

Humans cannot detect Radon on their own; a test is needed to determine if it is present and at what levels. Canadian guidelines measure Radon levels in becquerels per cubic metre (Bq/m3). So there may be variations from day to day or season to season. 

Radon Mitigation: Solutions for High Radon levels Edmonton

Active Sub-Slab Depressurization (ASD) is both an efficient and reliable method for lowering indoor air levels. To improve the effectiveness of ASD systems, professionals seal visible cracks and openings in the foundation before installation.

Frequently Asked Questions

How often should I test my home in Edmonton for Radon?

If your initial test shows levels below 200 Bq/m³, retest every 2 to 5 years. If your home has been mitigated, periodic re-testing every 2 to 5 years is still advised to ensure the system remains effective. If you've never tested, doing so is the first step to understanding your home's Radon status.

Are there visible signs of Radon gas in a house?

No. Radon is colorless, odorless, and invisible, so it cannot be detected by sight, smell, or taste. Testing is the only reliable way to know if your home has elevated radon levels.

Conclusion

Finding radon in your home does not automatically mean it is unsafe, but elevated levels should be addressed promptly. One way to do this is by using a Health Canada-approved Radon detector for long-term testing. This will give you an accurate reading of the average Radon levels in your home over time. If the levels are found to be above 200 Bq/m³, then action should be taken to reduce them.