Was in a house this weekend with a little bit of insulation. Behind it was a white sheet that i haven’t seen before. Is it a vapor barrier?

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It's a vapor barrier, but a poorly installed one... maybe just because of the window. This room looks like it's going to be a bathroom of some sort.

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  • Yes it’s a bathroom. My assumption is they’re not finished hence the incomplete installation. – Craig Oct 6 '19 at 21:43
  • The insulation was placed there because after the big tub is installed it will be inaccessible.and the white plastic is a “finished” wall surface for under the tub. – Kris Oct 6 '19 at 21:57

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