Slab on Grade
Slab-on-grade construction: the ecoHOME A to Z Slab building guide
...panelsand then the centerpanels. Next, cut around the plumbing system and mechanical equipment. Ensure that there are no gaps in the insulation, even in problem areas. Install a polyethylene air / vapour barrier over the entire insulation area. In some cases, a coat of closed-cell spray foam will be added at this...