I am building a outdoor bar with pt lumber and want to put some veneer stone on front and sides. I was going to use hardi cement board with metal lath, do I need any waterproofing between pt studs and cement board was going to do skim coat, over lath and then stone. The bar will be under a covered roof but does get some blown in rain? I have some tyvex wrap from someone I thought about using between cement board and pt framing if needed any advice would be great.
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