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 03-21-2010, 02:19 PM   #1
mnations
Registered User
 
Join Date: Mar 2010
Posts: 2
Vapor barrier stumper, where does the water go?

I have been chasing this rabbit down for a couple of weeks now, and I just can't find an answer.

I'm installing a standard tub and building a tub surrounding with tile with hardibacker as the cement board. Most places recommend bringing a 6mil plastic vapor barrier down past the flange of the tub so that it drapes over.

I completely understand why the vapor barrier is necessary and understand the theory behind bring any moisture back into the tub. This seems to be an accepted method across many different resources. But where does the water go?

If water does collect on the VB and slides down it, the water will settle in the space behind the tile on the surface of the tub that has been sealed with caulk. The same caulk designed to keep water out will also keep all this water in, which will have no where to go. Following through the process it will simply keep collecting until it reaches the hardibacker, at which point it will be wicked up and held.

It seems like if water vapor does collect it would be better pulled down below the tub where at least it has more change of evaporating then in the water tight space behind the tile.

Thanks for any input.
__________________
Hookem
mnations is offline   Reply With Quote
Sponsored Links
Unread 03-21-2010, 02:29 PM   #2
Brian in San Diego
AC Specialist -- Schluterville Graduate
 
Brian in San Diego's Avatar
 
Join Date: Oct 2005
Location: La Quinta, CA and Usk, WA
Posts: 10,791
Hookem,

Yes, a frequently debated topic. The answer is that it will evaporate back the way it came...through the grout. Many believe a couple of "weep" holes should be left in the caulk joint at the tub to allow the water to actually drain out into the tub.

Brian
__________________
Brian
If that doesn't work, I'll always think it should have.
Brian in San Diego is offline   Reply With Quote
Unread 03-21-2010, 02:53 PM   #3
mnations
Registered User
 
Join Date: Mar 2010
Posts: 2
Thanks Brian. I wondered about leaving some kind of weep hole, but that seemed to defeat the purpose of sealing off the bottom in the first place.

What would be ideal is if in place of a weep hole there were some kind of small one-way plug that allowed water to escape but didn't let any back behind the tile, something that would be set in the caulk and be practically invisible from the front.
__________________
Hookem
mnations 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
Vapor Barrier - To be or Not to Be travellerw Tile Forum/Advice Board 9 09-20-2007 03:30 AM
To Vapor Barrier or Not to Vapor Barrier, that is the question Beko Professionals' Hangout 22 05-06-2007 09:56 PM
vapor barrier ajcbgray Tile Forum/Advice Board 1 05-24-2005 01:29 PM
Vapor Barrier BobW Tile Forum/Advice Board 45 04-03-2005 09:04 PM
vapor barrier steveo Tile Forum/Advice Board 3 01-27-2004 08:41 AM


All times are GMT -6. The time now is 05:35 PM.


Sponsors

Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Copyright 2018 John Bridge & Associates, LLC