To limit the probability of that the remediation of high indoor radon concentration is unnecessarily difficult and costly after the construction of the building is complete, which could lead to negative effects on the air quality of indoor spaces, which could lead to harm to persons.
To direct Code users to Article 9.13.4.3.
To expand the application of Articles 5.4.1.1. and 6.2.1.1. to include the design and construction of radon mitigation systems for buildings where single-point subfloor depressurization systems may not be sufficient to address high indoor concentrations of radon.