Position of outside plywood sheathing
Have finally completed board formed concrete walls on the house…will begin placement of metal columns and beams later this week and then onto framing.
I have a question regarding the exact structure of the wall where the stone will be placed. I plan on using 2×6 studs, 1/2″ plywood, 1″ XPS or polyiso rigid foam, 4″ stone. My stone ledge is 5.5″ wide and so I am trying to figure how to make this work. Can I move the base plate in by 1/2″, having the 1/2″ plywood sit at floor level and then overlap the rigid foam on the stone ledge(using it as a rain screen)? Or does the plywood sheathing have to sit over the stone ledge, which would mean I would have to use thinner rigid foam insulation? How much space behind stone (it is all 4″ saw cut so no irregularities there”) is enough? Thank you for your help.
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