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Have to do the shower soon, was looking at dry pack, which is new to us.
We have the pex zip tied to 4 inch wire grid, laying on insulating foam, will not attempt to raise the wire grid. Need a depth of mud about 2 to 3 inches. Can I dry pack directly onto the styrofoam, or should I pour wet cement to cover the pex, then drypack next day to give drypack a firm base? Have lots of exp with wet mud, and do not fear doing the pan with high strength fiber entrained cement.