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Old 06-04-2013, 08:57 PM   #1
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New Basement bath


I am finishing my basement and I added a 6x8' bathroom. It is located in a corner. The 2 foundation walls are frammed about 8" from concrete block. I have installed R15 Roxul b/w studs. The rest of the basement has 1" foam board.
My question is what kind of vapor barrier to use b/w the roxul and the concrete board/hardy backer board??
My "old faithful" Stanley Bath Reno book has suggested using asphalt paper or tar papaer. Do guys still use that or 8or> mil plastic??
Thanks,
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Old 06-05-2013, 03:28 AM   #2
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That book is really old---
Best methods now a days if to use no vapor barrier behind the backer board -----instead, Waterproof the face of the board with Redguard or Hydroban

If you choose not to waterproof the board,then a heavy plastic sheet is used.
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Old 06-05-2013, 03:58 PM   #3
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Quote:
Originally Posted by oh'mike View Post
That book is really old---
Best methods now a days if to use no vapor barrier behind the backer board -----instead, Waterproof the face of the board with Redguard or Hydroban
great thanks
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