Bathroom Vapor Barrier Exterior Wall at Exterior

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Bathroom Vapor Barrier Exterior Wall. Use a good quality primer and paint for the ceiling above if that. You'll want to overlap any seams by 3 inches.

What is correct vapour barrier method for bathroom ceiling
What is correct vapour barrier method for bathroom ceiling from diy.stackexchange.com

At exterior vertical surface of wall insulation in all climate zones; Never install a basement vapor barrier because it can cause mold to grow and spread. This wall assembly will dry from the vapor barrier inwards and will dry from the vapor barrier outwards.

What is correct vapour barrier method for bathroom ceiling

One of the short walls of the tub is on an exterior wall. One of the short walls of the tub is on an exterior wall. The liquid membrane acts as the vapor barrier so you don't need plastic behind the cement board. My plan is to install a 6mil plastic sheet vapor barrier on the exterior walls, over the unfaced insulation.