This document specifies requirements for the determination of the activity concentration of radon in
all types of buildings. The buildings can be single family houses, public buildings, industrial buildings,
underground buildings, etc.
This document describes the measurement methods used to assess, during the initial investigation
phase, the average annual activity concentration of radon in buildings. It also deals with investigations
needed to identify the source, entry routes and transfer pathways of the radon in the building (additional
Finally, this document outlines the applicable requirements for the immediate post‑mitigation
testing of the implemented mitigation techniques, monitoring of their effectiveness and testing of the
sustainability of the building's behaviour towards radon.
This document does not address the technical building diagnostic or the prescription of mitigation work.