LEED builder radon advice 4

https://sticky-wiki.win/index.php/Understanding_Radon_in_Slab_Foundations:_Risks_and_Mitigation_for_Pennsylvania_Homes

For builders aiming for LEED certification, radon advice often starts with proper site testing and soil gas mitigation. A simple vapor barrier under the slab isn't enough; you need a passive system with a stub for active depressurization if levels come back high. I've seen projects pass just by installing a sealed sump and vent pipe, which also earns an IEQ point. Remember to seal all penetrations through the slab—electricians often forget that little gap around the conduit.