How do you attach steps to slab on grade insulation?
...straw-bale, with the bales inside the 2x4 framing, and either a variation of light-straw-clay or blown mineral wool infill insulation, and plastered inside and out. We could perhaps use 2x6's with the extra 2' proud of the sill, but with wanting to insulate the external aspect of the slab very well (will have radiant ...