Water-resistive barrier behind cement backer board for shower

I’m installing a 30″x60″ steel tub and a glue-up acrylic surround attached to Durock cement board, with one end of the tub against a double-stud exterior wall that has Tyvek… I’m installing a 30″x60″ steel tub and a glue-up acrylic surround attached to Durock cement board, with one end of the tub against a double-stud exterior wall that has Tyvek…Read MoreGreenBuildingAdvisor