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Radon is a radioactive noble gas that forms naturally in the soil. It results from the natural decay chain of uranium, which is present everywhere in the soil. The natural decay of uranium results in radium and radon, among other things. Radon atoms can in turn decay into polonium, bismuth and lead. These “decay products” are also radioactive and combine with the aerosols in the air we breathe.

In enclosed, poorly ventilated spaces, they gradually accumulate. When breathing, they can enter the lungs, deposit on the lung tissue and irradiate it, possibly leading to lung cancer (Source: Federal Office of Public Health).

As part of the process of obtaining a building label or quality control, we measure the radon concentration in the lower floors of a building.

This measurement consists of installing a passive dosimeter for a sufficiently long period of time (between 3 months and one year).