Slab on Grade
Slab-on-grade construction: the Ecohome A to Z Slab building guide
...with no holes simply for the containment and evacuation of radon gas buildup below the slab. If you live in an area with no known radon contamination or have no intention of installing a radon evacuation system, holes in the poly are not a concern, as a 'vapour barrier' does not need to be sealed or airtight. See our v...
