Radon Mitigation Photo Album: Sub Slab Depressurization in Idaho City, ID

During the inspection of a home under contract in Idaho City, the buyer’s home inspector discovered an elevated radon level of 12.0 pCi/L. With limited service providers available in the home’s remote location, Idaho Radon designed an active sub-slab depressurization system that included a suction point drilled horizontally through the foundation footer beneath the basement floor. The vent piping was routed through an adjacent 9-foot-high storage crawlspace, with the fan installed on the exterior and venting extended to roof level.   One unique challenge was the basement floor—it was constructed of brick rather than a traditional concrete slab, creating concern that multiple suction points might be necessary. Fortunately, the completed system successfully reduced the average radon level from 12.0 pCi/L to 2.7 pCi/L.