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 03-06-2007, 09:38 AM   #1
gc2098
Registered User
 
Join Date: Mar 2007
Location: Harbor Springs, MI
Posts: 1
Premixed thinset under Durock - dumb?

First off I'd like to say this is a great site with a wealth of valuable info and advice. I discovered this site a few months ago before I did a slate gas fireplace surround and hearth job which was also my first tile job. I'm glad I looked here first. It came out great.

Yesterday, I started another job - ceramic floor tile in the bathroom. I ripped up the vinyl floor and plywood underlayment and screwed down Durock over unmodified thinset which I had left over from the last job, over the OSB sub-floor. About 3/4 of the way through I ran out of thinset. I had a small bucket of Mapei premixed thinset that I bought before I learned that it was junk so I figured I could use it to finish up. The stuff was like glue and difficult to work with and I started wishing I would have made an emergency trip to the store for more good thinset but I ended up putting the second sheet of Durock down over the blend of unmodified thinset and premix. Now i'm stressed about it. Is there anything to be worried about or will it be ok since it is only under the backer board?

Thanks,

Grant
gc2098 is offline   Reply With Quote
Sponsored Links
Unread 03-06-2007, 05:40 PM   #2
John Bridge
Mudmeister
 
Join Date: Mar 2001
Location: Rosanky, Texas
Posts: 67,828
Send a message via AIM to John Bridge
Hi Grant, Welcome aboard.

The so-called "pre-mixed" thin set is mastic, which needs air to harden. And then it doesn't really harden completely for years, at which time it becomes brittle. Are you okay? I don't know. Would I re-do the one sheet instead of worrying about it for the next few years? Yep.
John Bridge 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 01:25 PM.


Sponsors

Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Copyright 2018 John Bridge & Associates, LLC