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   Buy a TYW Shirt

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

Sponsors


Reply
 
Thread Tools Search this Thread
Old 07-10-2011, 09:25 AM   #1
rossow (mn)
Registered User
 
Join Date: Oct 2006
Posts: 8
Subfloor thickness for Ditra?

I have never used Ditra and need advice. Assuming framing provides adequate protection against deflection, am I correct that I can apply Ditra over 3/4-inch T&G glued-and-screwed plywood subfloor, then 1/4-inch 12x12 ceramic tile over the Ditra? I'm from the old school that learned subfloor under tile should be at least 1-1/8" thick (e.g., 3/4 + cement board). Does the isolating function of Ditra let me get by without the cement board (again, assuming subfloor/framing meet deflection standards)? Ditra seems too good to be true in helping keep floor thickness down where new floor butts against old floor in an addition. Am I off-track here? Please advise.

Last edited by rossow (mn); 07-10-2011 at 09:25 AM. Reason: typo - repeat words
rossow (mn) is offline   Reply With Quote
Sponsored Links
Old 07-10-2011, 09:43 AM   #2
cx
da Home-builder -- Moderator-at-Large
 
cx's Avatar
 
Join Date: Jul 2001
Location: Boerne, Texas
Posts: 74,343
Welcome back, rossow (mn). Please put a first name in a permanent signature line for us to use.
Quote:
Originally Posted by rossow
I'm from the old school that learned subfloor under tile should be at least 1-1/8" thick (e.g., 3/4 + cement board)
Gotta be a really old school. Never been such a requirement that I'm aware of. Lotta misconceptions out there about it, though.

The subflooring requirement for use with any CBU is specified by the CBU manufacturer, and is generally specified using their thinnest material. Use of half-inch CBU (or thicker) is indicated only when it's desirable to raise the tile installation. The subfloor requirement remains the same.
Quote:
Originally Posted by rossow
...am I correct that I can apply Ditra over 3/4-inch T&G glued-and-screwed plywood subfloor, then 1/4-inch 12x12 ceramic tile over the Ditra?
That would depend upon your joist spacing. If you'll go to the Schluter website, you'll find their requirements for the use of Ditra in most any common subflooring situation. Their instructions are usually very clear.

Ditra is not too good to be true, it's simply a higher-tech replacement product for more traditional CBU underlayments. Still requires the same joist deflection and subflooring considerations as other such products. And it's easier to use than most.

My opinion; worth price charged.
__________________
CX

Y'ALL NEW VISITORS READ THISSY HERE! ......
cx is online now   Reply With Quote
Reply

Buy John's New Book!   Tile Your World Online Store   Contractors Direct Tile Tool Store   Stonetooling.com   Tile-Assn.com


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
Ditra Thickness Craigsproject Tile Forum/Advice Board 3 10-27-2010 03:39 PM
subfloor thickness slapappy Tile Forum/Advice Board 2 10-08-2007 08:48 PM
Thickness of Ditra VirtualThought Tile Forum/Advice Board 9 07-15-2006 09:46 PM
thickness of subfloor? Ased Tile Forum/Advice Board 4 03-23-2006 05:47 AM
Subfloor Thickness kmwhitt Tile Forum/Advice Board 1 05-11-2005 08:50 AM


All times are GMT -6. The time now is 12:39 AM.


Sponsors

Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 2014 John Bridge & Associates, LLC