radon systems for stone foundations 3

https://getbasementradonpreventionbase.novacrestiq.com/posts/basement-radon-prevention-what-every-homeowner-should-know-before-it-s-too-late

When you've got a stone foundation, radon systems need a bit more finesse because those irregular gaps and spaces can let soil gas seep in. Instead of just a standard sub-slab depressurization, you often need to seal visible cracks with special polyurethane foam and then run a vent pipe through the floor above to pull air from under a vapor barrier. Many homeowners combine this with passive stack vents that rely on natural air pressure differences, though an active fan usually works better in o…