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Radon Design Blog
Guides on radon-control design for multifamily, HUD, school, and commercial construction, keyed to the ANSI/AARST standards that reviewers and lenders check for.
Published July 3, 2026
HUD Radon Requirements for Multifamily Housing
HUD-financed multifamily housing must address radon two ways: ANSI/AARST testing with a 4.0 pCi/L action level for existing buildings, and CC-1000-2018 design for new construction.
Read the guidePublished June 30, 2026
ANSI/AARST CC-1000 Radon Design Requirements for New Construction
ANSI/AARST CC-1000-2018 sets the radon design requirements for new multifamily, school, and commercial construction: a continuous gas barrier, sub-slab collection, suction points, and code-placed vent stacks.
Read the guidePublished June 29, 2026
Radon Mitigation Design for Multifamily Buildings
How to design a radon mitigation system for a multifamily building to ANSI/AARST CC-1000-2018: what the package includes, passive vs. active control, and HUD requirements.
Read the guide
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