Radon - What you need to know

What is radon?

Radon is a radioactive gas that comes from the breakdown of uranium in soil and rock. It is invisible, odourless and tasteless.

When radon is released from the ground into the outdoor air, it is diluted and is not a concern. However, in enclosed spaces, like homes, it can accumulate to high levels and become a health risk.

How radon gets into your home

The air pressure inside your home is usually lower than in the soil surrounding the foundation. This difference in pressure draws air and other gases, including radon, from the soil into your home.

Radon can enter a home any place it finds an opening where the house contacts the ground: cracks in foundation floor and walls, construction joints, gaps around service pipes, support posts, window casements, floor drains, sumps or cavities inside walls.

Testing your home

There are two options for testing a house for radon:

  • Purchase a do-it-yourself radon test kit
  • Hire a radon measurement professional

For more information about radon testing services, visit www.canada.ca/radon.

New home construction and renovation

The Alberta Building Code requires a radon consideration for all new construction projects. If you are adding to the footprint of your home, this may affect your renovation.

For more information about your construction or renovation project visit www.calgary.ca/myHome or ask a question via live chat.

Radon - Resources and information

For more information on radon testing or mitigation, please contact Health Canada.