Re: Bathroom renovation
Blue and green board are forms of moisture resistant drywall. As I recall, code only allows their use over and around tubs and showers, they cannot be used for the tub/shower walls themselves because if they get wet, they deteriorate just like any other form of drywall. Other options would be to use cement backer board (brand name Durock ) or a fiber board (brand name HardiBacker ). When using these products, the joints are taped with fiberglass mesh and dry mixed joint compound. The dry mixed joint compound is more of a plaster type product and doesn't wash out like the redimix type drywall compounds if it gets wet.
I am not sure if blue board or green board would be permissible if you go with mortar set tile, where cement is mixed and applied to the wall under the tile.
As for tubs or pans with integrated seats, I've only used hot mop style, where the base is framed out in wood then tar paper and hot tar are applied to seal the pan and seat area. Over these hot mops I've always had mortar set tile installed.
If you go with a preformed fiberglass pan or tub, you'd install this before the wall covering is installed. The backer would be installed to the top edge of the tub/pan lip and the tile would install over the tub/pan lip. This prevents wicking of moisture from behind the tile at the tub/pan to wall intersection.
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