Radon Testing & Mitigation in London, Ontario

Radon is a naturally occurring radioactive gas that forms from the breakdown of uranium in soil, rock, and groundwater. It is invisible, odorless, and tasteless, making it impossible to detect without specialized testing.

Radon can seep into homes through cracks in floors, foundations, sump pits, and crawl spaces. Over time, exposure to elevated radon levels can pose serious health risks, including an increased risk of lung cancer. Read more: What is radon gas?

Radon gas enters your home from the soil due to a pressure difference between the indoor air and the ground beneath your home. Because the air pressure inside your house is usually lower than in the soil, radon is naturally drawn in through openings and gaps in your foundation.

Common radon entry points include:

• Cracks in basement floors, foundations, and walls
• Construction joints and gaps around pipes or wiring
• Floor drains, sump pumps, support posts, and wall cavities
• Spaces around window casements and service penetrations

Once inside, radon can accumulate to dangerous levels, especially in basements and lower levels with poor ventilation.

Yes, radon gas is common throughout Canada. It occurs naturally in all provinces and territories, as it forms from the breakdown of uranium found in Canadian soil and rock.

A 2024 country-wide study led by a researcher at the University of Calgary found that 17.8% of Canadians, about 1 in 6, live in buildings with radon above Canada’s guideline. Because radon is invisible and odorless, testing is the only way to know if your home has high radon concentrations.

If your home has elevated radon levels, it’s important to take action. Long-term exposure increases the risk of lung cancer, especially in lower levels of the home where radon tends to accumulate. Health Canada recommends reducing a yearly average radon level above 200 Bq/m³ within 1 year, and sooner the higher the level is.

The most effective solution is to consult a certified radon mitigation specialist like Platinum Air Care. We install radon mitigation venting systems that safely redirect the gas from beneath your home to the outdoors.

For additional protection and improved indoor air quality, consider adding a medical-grade air purification system to help filter other airborne contaminants.

Radon exposure is the second leading cause of lung cancer in Canada, following tobacco use, and lung cancer is the most commonly diagnosed type of cancer in Canada. When inhaled over time, radon gas decays into radioactive particles that can damage lung tissue.

The risk is higher for:

• Smokers or former smokers
• People with long-term exposure in poorly ventilated spaces
• Residents of homes with radon levels above 200 Bq/m³

The only way to know your risk is to test your indoor air for radon gas.

Platinum Air Care provides radon testing and mitigation services throughout Southwestern Ontario, Canada. Our certified technicians serve both residential and commercial properties in cities such as London, Hamilton, Kitchener, Windsor, St. Thomas, and surrounding areas.

If you’re located in Southwestern Ontario and concerned about radon exposure, our team can help with professional testing, mitigation system installation, and indoor air quality solutions. For radon mitigation or a radon test, call (519) 686-3595.

You can test your home using a DIY radon test kit or by hiring a certified radon measurement professional. Health Canada recommends:

• A long-term test (at least 91 days) for accurate results
• Testing during colder months when homes are sealed
• Placing the test on the lowest level of the home used regularly

Kits are available online, at hardware stores, or through certified radon contractors. For a quick first look, our in-home radon test starts reading within the first hour, with on-the-spot advice in your home.

Health Canada advises action if your home’s yearly average radon level is above 200 becquerels per cubic meter (Bq/m³). The World Health Organization recommends action above 100 Bq/m³.

Homes above 200 Bq/m³ should install a radon mitigation system to reduce health risks. Even homes slightly under the limit may benefit from improved ventilation and radon-reducing techniques. Read more: radon levels and converting Bq/m³ to pCi/L.

Yes, radon can affect homes of any type, including those built on slab-on-grade foundations, over crawl spaces, or with no basement at all.

Radon enters through openings in the foundation, no matter how deep. Homes with no basement may still have elevated radon levels, especially if they’re tightly sealed and lack proper ventilation.

No, radon is a concern in both new and older homes. In fact, modern, energy-efficient homes can trap radon gas more easily due to tighter construction and reduced airflow.

Since radon comes from the ground beneath your home, it can affect any building regardless of age, style, or location. All homes should be tested for radon, even recently built ones.