Ceramic Tile Advice Forums - John Bridge Ceramic Tile

Welcome to John Bridge / Tile Your World, the friendliest DIY Forum on the Internet


Advertiser Directory
JohnBridge.com Home
Buy John Bridge's Books

Go Back   Ceramic Tile Advice Forums - John Bridge Ceramic Tile > Tile & Stone Forums > Tile Forum/Advice Board

Sponsors


Reply
Thread Tools Search this Thread
Unread 04-28-2008, 03:37 PM   #1
C-Bucky
Registered User
 
Join Date: Apr 2008
Posts: 1
Replacing upstairs Ensuite shower (Kerdi)

My house is 20 years old. I tore out the old tile shower when I noticed one wall was soft. That was an outside wall and underneath the sheetrock was the plastic vapor barrier. It was covered in black mold. I've removed everything right down to the studs and plywood floor but I didn't remove the plastic vapor barrier from the outside wall. I've reinstalled concrete board on the outside wall (opposite the showerhead) and greenboard on the rest of the shower enclosure and I've taped and mudded all the seams. I purchased a Kerdi kit with the membrane and tray. Before I go any further, I have a couple of questions:
  • Can I apply thinset and Kerdi overtop of drywall compound?
  • As I've heard that should be some way for the water from the thinset to evaporate, can I apply Kerdi to the wall with the plastic vapor barrier still intact behind the concrete board?
    If not, do I have to rip out the board and remove the plastic or could I just apply the Kerdi partway up. That wall is 92 inches high, so could I apply Kerdi to just the bottom 60 inches?
C-Bucky is offline   Reply With Quote
Sponsored Links
Unread 04-28-2008, 05:20 PM   #2
ceramictec
Tampa Florida Tile Contractor
 
ceramictec's Avatar
 
Join Date: Oct 2007
Location: Tampa, Florida
Posts: 26,498
most tile installers don't like to install anything over drywall compound.
but you can prime it and go over it with thinset.

you will be using a unmodified thinset behind the Kerdi so you want the thinset to slow cure with moisture to make stronger.

I don't think the plastic barrier needs to come down since when Kerdi is done correctly there will be no moisture getting behind the wall.

others here may have more insight on the barrier for you.
__________________
Brian

Tampa Florida Tile Installation
^^Check out our Blog^^
ceramictec is offline   Reply With Quote
Reply

Stonetooling.com   Tile-Assn.com   National Gypsum Permabase


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 11:34 PM.


Sponsors

Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
Copyright 2018 John Bridge & Associates, LLC