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 01-29-2013, 02:12 AM   #1
'65 corvette
Registered User
 
Join Date: Jan 2013
Posts: 2
Shower Vapor Barrier

I have a house that was built in the early 1950's. The walls are a plaster board that vary in thickness, 5/8'' to almost 3/4''. I am putting in a shower surround and am hoping that I can leave the existing sheetrock up. My reasoning for this is where the tile will tie into the sheetrock, I don't think it will transition cleanly.

My first question is- Can I leave the existing sheetrock up, use 15 lb felt as a vapor barrier, and then attach my hardi backer board over it? I am having a hard time getting a straight answer on leaving the existing sheetrock up.

Second question- I formed the curb up, applied felt paper to the sub floor, then metal masonery lath on top of it. I poured the pre shower pan at 1/4'' per foot of fall, using pre pitched plastic guides for my slope. The bedding material was a 4 to 1 bedding type grout. I then applied my rubber membrane and water tested for 24 hours, no leaks. However, after the water drained, I noticed an ever so slight (about 10'' diameter) puddle near one side of the drain. I checked the entire pan with my torpedo level for fall, the bubble was buried on the correct side, except for where the water pooled. I had downward fall in that area, but not much of it. Part of the problem looks to be where the rubber membrane is folded around the drain flange and is sticking up ever so slightly in that area. When I push down on it, it drains better. Is this going to be an issue.....and when I pour the final mud bed, will it keep the membrane pushed down around the drain flange?

Thanks Joe.
__________________
Joe
'65 corvette is offline   Reply With Quote
Sponsored Links
Unread 01-29-2013, 08:59 AM   #2
Houston Remodeler
Pondering retirement daily

STAR Senior Contributor

 
Houston Remodeler's Avatar
 
Join Date: Oct 2009
Location: Houston Texas
Posts: 28,236
Joe,

Welcome to the forum.

1- Yes you can leave the old drywall in place and install a waterproofed shower over that. But pay special attention to the bottom edge. You don't want to get water wicking up from the shower floor / tub ledge into the drywall from the bottom.

2- If the slope is proper, and from your description, when the mud is packed on the upper layer, that setting water will be wicked up into the mud bed and spread itself out. You're fighting the surface tension of the water and the liner, which will not be such a huge factor.
__________________
Paul1

For when DIY isn't such a good idea...
Houston TX area Kitchen & Bath Remodeling


http://CabotAndRowe.com
Houston Remodeler is offline   Reply With Quote
Unread 01-29-2013, 07:27 PM   #3
'65 corvette
Registered User
 
Join Date: Jan 2013
Posts: 2
RE Vapor Barrier

Thanks Paul!

I really appreciate your advice, I contacted my local building code inspector today- He agreed with you.

Thanks Joe.
__________________
Joe
'65 corvette 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Shower Vapor Barrier matttr Tile Forum/Advice Board 5 12-02-2007 05:20 PM
Vapor barrier for the shower cshaws Tile Forum/Advice Board 3 08-23-2006 01:55 PM
Vapor barrier behind shower pan DannyM Tile Forum/Advice Board 4 05-09-2005 04:19 PM
Shower vapor barrier JoeBtfsplk Tile Forum/Advice Board 5 08-16-2004 02:28 PM
Vapor Barrier in Shower? jgpilar Tile Forum/Advice Board 11 10-10-2001 04:57 PM


All times are GMT -6. The time now is 06:35 AM.


Sponsors

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