For an interior wall I would say no to the "sill seal" or plastic. Plastic would serve as a moisture barrier under the slab. The sill seal material is for exterior walls sitting on masonry or concrete foundation wall or slab and prevents air infiltration. I would think there is a code for the exterior walls. I also don't know if PT is required for the wall bottom plate although I would consider it in a basement (possible wet area). I guess it would be called a "sill" plate if you put a typical wall bottom plate on top of that.
I don't see a second question.
|