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 01-22-2020, 08:22 AM   #1
adefields
Registered User
 
Join Date: Jan 2020
Posts: 1
Removing and Replacing A Section of Kerdi Membrane

Hi all-

Not sure if this warrants a new thread, but I couldn't find any info from a search. I am installing the Schluter shower system and I noticed that the Kerdi shower valve cover that I installed has a pretty good size air pocket behind it, and it is wrinkled because I didn't cut the hole for it quite big enough. I'd like to remove it and reinstall a new one, and I suspect this will ruin the kerdi membrane behind it (and part of that membrane isn't sticking to the wall anyway, hence the air pocket).

Any advice on cutting out a section of the Kerdi membrane and replacing it with a new section? I'm looking at maybe a 20 inch by 20 inch section around the shower valve. I would of course, put Kerdi band over the seems. My biggest concern is will the new thinset stick over the old/dried thinset? Do I need to try to scrape most of that off without damaging the wall? Any tips or tricks here?

Thanks,

Adam
__________________
Adam
adefields is offline   Reply With Quote
Sponsored Links
Unread 01-22-2020, 08:39 AM   #2
ss3964spd
Moderator
 
ss3964spd's Avatar
 
Join Date: Jul 2005
Location: Fairfax, Va
Posts: 2,981
Send a message via Yahoo to ss3964spd
Welcome, Adam.

Yup, new thinset mortar will stick just fine to old thinset mortar. Scrape off as much of the old as you can, and you don't have to worry about the wall board too much since you're just covering with Kerdi again, but of course don't take any large divots out of it.

Instead of covering the seams with band, just size your new piece so that it will over lap the old by at least 2" on all sides.
__________________
Dan
---------------------------------------------------------------------------------
If I recall correctly my memory is excellent, but my ability to access it is intermittent.
ss3964spd is offline   Reply With Quote
Unread 01-22-2020, 07:48 PM   #3
Tool Guy - Kg
Moderator -- Wisconsin Kitchen & Bath Remodeler
 
Tool Guy - Kg's Avatar
 
Join Date: Feb 2005
Location: Oak Creek, WI
Posts: 21,840
Welcome to the forum, Adam!

Yeah, I’d simply cut a single patch large enough to not need any KerdiBAND. While the KerdiBAND is thinner, you’d otherwise have a double overlap of the KerdiBAND at the corners anyways. So, I’d go with a single patch.

__________________
Tonto Goldstein... but my friends call me Bubba

Help an awesome summer camp!
Tool Guy - Kg 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
Replacing drywall section, remove trim, or not? CCDIYer Tile Forum/Advice Board 7 12-01-2015 11:38 PM
Replacing a section of caulk? LanceInRaymond Tile Forum/Advice Board 2 07-28-2015 05:33 AM
Laying floor tile/grouting/sealing section-by-section kh36267 Tile Forum/Advice Board 1 02-06-2006 08:27 PM
Removing caulk & replacing OnAMission Tile Forum/Advice Board 20 03-07-2004 03:32 PM


All times are GMT -6. The time now is 08:37 AM.


Sponsors

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