Hello all,Slab-on-grade, 2100 sqft residential build question.What would be the recommended gravel for 1) easy to level/screed after plumbing install and 2) facilitate passive radon mitigation?Thanks.WD Hello all,Slab-on-grade, 2100 sqft residential build question.What would be the recommended gravel for 1) easy to level/screed after plumbing install and 2) facilitate passive radon mitigation?Thanks.WDRead MoreGreenBuildingAdvisor

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