Elevated radon of average 6.3 pCi/l after a competitor installed a radon mitigation system. Homeowner called us to troubleshoot and ask for resolution to correct the competitor’s work.
We installed a 6-mil reinforced radon barrier in the crawlspace, nailing to the walls and taping all lap joints. Adding a 3 baffle to suction line. This corrected the previous poorly installed system and brought the radon level down to 1.4 pCi.l”