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 05-10-2011, 11:39 AM   #1
jensville
Registered User
 
Join Date: Feb 2011
Posts: 11
Redgard over plywood

Hello list,

In reading the posts, it seems that nobody likes installing ceramic tile over plywood. I have not seen anyone explain why. I was wondering because I have a floor that had carpet on it. The deflecto is 857 and has 1X8 boards diagonally across the joists with 3/4 inch CDX plywood on top of that. Since the floor seems to be free from squeeks and solid, is it still suggested that I put down CBU on top.

Would it be advantagous to put Redgard down instead of CBU to eliminate fracturing? I have Redgard left over from a previous project.
__________________
Craig
jensville is offline   Reply With Quote
Sponsored Links
Unread 05-10-2011, 11:51 AM   #2
Houston Remodeler
Pondering retirement daily

STAR Senior Contributor

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

Your first problem is going to be that CDX you have there. Not good for tile at all. Read the library section on plywood for tiling.
__________________
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 05-10-2011, 12:55 PM   #3
jgleason
Retired Moderator - Theatre Guy (and computers)
 
jgleason's Avatar
 
Join Date: Mar 2004
Location: Weare, NH
Posts: 8,907
Yea, the cdx is not so good. I wouldn't bother with the Redgard either.

Replace the cdx and then either install 1/4" cbu over it or an uncoupling membrane like Ditra.
jgleason is offline   Reply With Quote
Unread 05-10-2011, 01:47 PM   #4
bbcamp
Registered User
 
Join Date: Jul 2002
Posts: 30,274
Redgard can be used as an antifracture membrane over a properly prepared plywood subfloor. I take that to mean any plywood subfloor that meets the installation method (F142, F143, F150, etc) for tiling directly on a plywood subfloor according to the TCNA (Tile Council of North America). Your floor wouldn't, even if you had the correct plywood. None of the methods in teh tile handbook start with a plank subfloor, although I suppose the 3/4" plywood would make that a debateable issue.
bbcamp 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
Redgard over plywood cabinet Jason_Butler Professionals' Hangout 9 02-26-2007 02:43 PM
Need advice on plywood vs. no plywood over slab foundation sonicd Tile Forum/Advice Board 3 02-18-2007 11:24 AM
Redgard on plywood subfloor any use? rpmartino Tile Forum/Advice Board 1 11-08-2006 05:45 PM
Plywood on top of plywood intall ?? Duane Pulliam Tile Forum/Advice Board 1 09-21-2004 04:29 PM
uses for redgard JEPPY Tile Forum/Advice Board 1 09-06-2004 12:21 PM


All times are GMT -6. The time now is 10:44 AM.


Sponsors

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