Radon barrier for on-grade concrete slab

Hi,About to have a new build with footing/frost wall and on-grade slab with radiant heating (no basement or crawl space).My question is whether I should have the builder put in… Hi,About to have a new build with footing/frost wall and on-grade slab with radiant heating (no basement or crawl space).My question is whether I should have the builder put in…Read MoreGreenBuildingAdvisor