Best practice for stone siding over stick-built walls?
We are planning to apply 4 inch thick rubble stone siding over the lower level of our daylight basement home. We had originally planned for ICF at the lower level walls, partly to mitigate rain water and inward vapor drive risk brought on from the stone (which is south facing). As it turns out the ICF represents a substantial cost increase and we are considering alternative wall options (stick-built) for the above grade portion of the lower level wall.
Due to the irregular, non-dimensional geometry of our stone, the use of a conventional rain-screen does not seem feasible. If we go the stick-built route, we are considering a Delta-Dry or similar engineered rain-screen layer instead; with some type of sheathing (rigid foam?) that would allow a parging coat and stone to be directly affixed over it. We would need to accommodate shear requirements where indicated and still maintain our R-value. Where would our water resistive and vapor impermeable barrier/barriers fit into this? Can you recommend a detail that would best address this scenario?
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