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Vapor barrier and insulate brick exterior wall of shower

Vapor barrier and insulate brick exterior wall of shower


  #1  
Old 01-11-15, 12:27 PM
J
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Vapor barrier and insulate brick exterior wall of shower

Greetings,

I have a shower I'm re-tiling. I have it down to the studs but back wall is exterior brick with only what appears to be 3/4" in planks nailed which were used for the cement board. I want to put up a vapor barrier but also want to know if insulating the brick wall is necessary. If so what should I use to insulate it if there's only 3/4" b/w planks and brick? The previous owner did not appear to have a vapor barrier or insulation up, but did have some sort of foil paper underneath the cement board. I'm new to this stuff so please tell me if this is indeed insulation and if so what is it called so I can replace it. Thanks.
 
  #2  
Old 01-11-15, 03:02 PM
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Got a picture?
Are these slates on the inside of the studs, or outside?
No way should there have been no insulation in an outside wall.
Tile board gets water proofed on the inside face of it not behind it.
 
  #3  
Old 01-11-15, 05:58 PM
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Slates? I'm not sure what you mean.
 
  #4  
Old 01-11-15, 06:04 PM
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Without pictures, we are guessing. You can possibly insulate the wall using Roxul insulation. It requires no vapor barrier, but I question the overall construction. How will you attach your concrete backer underlayment? We can walk you through this, but we need to see what you see.
 
  #5  
Old 01-18-15, 10:23 AM
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Sorry for the delay here's pics: jasonandmimi's Library | Photobucket
 
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Old 01-18-15, 10:29 AM
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Update: the foil paper I mentioned was radiant barrier. So should I go back to using this with the VB, just the RB or just the VB?
 
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Old 01-18-15, 10:33 AM
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On the outside walls (where the brick are), I would set a stud wall up separate from the 1x lumber, and insulate it well with Roxul, then a 6 mil vapor barrier, then cbu. You will be losing a little space, but insulation in that area will be necessary. Of course it will necessitate you building out the window frame as well, but needed.
 
  #8  
Old 01-18-15, 10:48 AM
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Great. I'll do that. Thanks for the advice.
 
 

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