Hello…I have a new build on a concrete slab with double 2″EPS layers and a 15 ml vapor barrier…all on rock fill with a sand topper and an extensive drainage… Hello…I have a new build on a concrete slab with double 2″EPS layers and a 15 ml vapor barrier…all on rock fill with a sand topper and an extensive drainage…Read MoreGreenBuildingAdvisor

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