Radoninpoisto

Radoninpoisto is the Finnish term for radon removal or radon abatement, referring to the methods and practices used to reduce the concentration of radon gas in indoor environments. Radon is a colorless, odorless radioactive gas that originates from the natural decay of uranium in soil, rock, and water. It can accumulate in buildings, especially those with basements or foundations close to the ground, and prolonged exposure to elevated radon levels has been linked to an increased risk of lung cancer. Because of this health risk, radon mitigation has become an important public health measure in many countries, including Finland.

In Finland, radon risk assessment is typically carried out during construction or renovation projects, with measurements taken using calibrated detectors such as charcoal canisters, alpha-track detectors, or continuous radon monitors. If the radon concentration exceeds the recommended action level—usually set at 200 becquerels per cubic meter (Bq/m³) by the Finnish Institute for Health and Welfare—radon abatement techniques are implemented. Common radon removal methods include sub-slab depressurization, where a pipe is installed beneath the foundation to vent radon to the outside, and active soil depressurization, which reduces the pressure differential that pushes radon into the building. In some cases, ventilation systems or sealing of foundation cracks are also used.

The Finnish government promotes radon mitigation through guidelines, public awareness campaigns, and support programs for homeowners in high-risk areas. Regulations and standards from the Finnish Standards Association (SAK) provide technical specifications for construction, testing, and remediation work. Continuous monitoring after remediation is recommended to ensure that radon levels remain below the action threshold, thereby safeguarding occupants from the carcinogenic effects of long-term radon exposure.