Radon is measured in becquerels per cubic meter of air (Bq / m³).
In Canada there are a guideline indicating that the radon concentration is not exceeded in a dwelling is 200 Bq / m³. In general, the radon concentration is not very high in homes in Quebec. The average concentration of radon in the basement is about 35 Bq / m³. However, concentrations can sometimes reach very high levels, up more than 1 000 Bq / m³.
Personal Protective Measures
If you smoke, the first thing to do to protect you against lung cancer due to radon is to quit. This is the quickest and least expensive to reduce the risk of lung cancer associated with radon. Indeed, a person who is exposed to both tobacco smoke and radon greatly increases the risk.
Corrective measures for your home
Health Canada recommends taking corrective action whenever the average annual radon concentration exceeds 200 Bq / m³ in the occupied areas of a home. If this is the case in your home, you must take action, whether smoking or not.
The recommended time to take corrective action depends on the average concentration of radon in your home:
You’ll get better results by applying more than one remedy. For example, you can:
If radon levels in the home are very high, these measures may not be enough, because they do not completely prevent the infiltration of radon. In this case, it is necessary to call a qualified contractor. This will set up a system which enables to evacuate the radon present in the foundation before the latter enters the living space of the building spaces.
Health Canada recommends that people taking corrective measures to try to reduce the radon concentration to the lowest possible level. This is why it is recommended to measure the radon concentration again after applying corrective methods to test their effectiveness.
Several specialized companies can help you reduce the concentration and radon infiltration into your home. It is very important to do business with a company certified. You can view the list of these companies on the site of the national competence Radon Program in Canada (PNCR-C) of Health Canada.
Measures for new construction
When building a new home, you can ask your contractor to use mitigation techniques to minimize radon gas from entering the home. If necessary, these techniques can also be applied to facilitate the removal of radon once the house built. However, it is easier and cheaper to do at the beginning of construction.