CAN/CGSB-149.11-2024

Scope This National Standard of Canada provides technical solutions for two levels of radon control options during the construction of a building, including radon gas control techniques, materials, products, and installation. These technical solutions address the following: a) Airtightness between the building and the ground. b) Passive depressurization of the space between the building and the ground. The radon gas control options provide guidance for the design of the system, the choice of materials, installation requirements, as well as provide basic construction specifications to minimize radon gas entry into a building and allow for future mitigation options. This standard specifically addresses techniques for reducing radon gas from infiltrating and diffusing into a building from the ground and facilitating depressurization. Units of measurement – Quantities and dimensions used in this standard are provided in units from the International System of Units (SI units). Imperial equivalents may be shown in brackets, if applicable. Please refer to the local building code for local tolerances.