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 06-12-2019, 05:34 PM   #1
tilenoobie0
Registered User
 
Join Date: Jun 2019
Posts: 2
Re-tiling/waterproofing old plaster walls

Hey everyone,

I'm renovating a small 1960s condo bathroom. 2 of the walls in the bathroom are solid 2.5" cement based plaster with wire mesh lathe (no studs) and the other 2 I believe are drywall (theses are shared walls between units)

The 60 year old tiles are letting go from the thinset in spots. My plan is to remove the tile and thinset (the original mortar thinset looks to be in great condition) and patch and paint the areas where there will be no tile, and re-apply thinset and tile around the tub/shower area. Does this sound feasible? Should I apply red gard? I figure since thinset alone has stood the test of time I don't need to red gard?

I popped off a tile from the plaster wall and scraped away the thinset and it looks like it'll leave a paintable surface, but I haven't tested the drywall. Any tips? My plan is to use porcelain and I'm not sure what type of thinset I should use.

Thanks in advance
__________________
tilenoobie0
tilenoobie0 is offline   Reply With Quote
Sponsored Links
Unread 06-12-2019, 07:02 PM   #2
Davy
Moderator -- Mud Man
 
Davy's Avatar
 
Join Date: Jan 2003
Location: Princeton,Tx.- Dallas area
Posts: 31,673
A picture or two would help us understand better. If you have sheetrock walls in the tub/shower area then you will want to screw cement board over it and apply Redgard (Home Depot) or Auqa Defense (Lowes) over the CBU. If the mud wall is in the shower area, I'd go ahead and cover the mud with waterproofing while you are at it. Be sure and get all the old thinset off first. The waterproofing will make it easier to tile.
__________________
Davy

www.davystephenstile.com
Davy is offline   Reply With Quote
Unread 06-15-2019, 07:06 PM   #3
tilenoobie0
Registered User
 
Join Date: Jun 2019
Posts: 2
Here are some pictures of the project. I began demo today and was very surprised. 3 (maybe all 4) walls are 100% plaster with metal lathe, very thick in spots.

I tested a spot with a grinder diamond cup/vacuum setup and the thinset is coming of nicely. The wall behind the toilet will be a bit tougher - the plaster is not finished and thinset was put directly onto the portland based plaster.

My plan is to remove all old tile (including floor), use a diamond cup grinder to level out and remove all the thinset. Then 12x24 porcelain tile, up to the ceiling around the tub/shower and on the floor. The plan for the areas walls where tile will not be replaced is to skim with plaster for a paintable finish.

There is no waterproofing currently. Would a red gard like product be a good idea in the tub area? Would I use a modified thinset for the new wall tile? The floor is concrete(tall building, the slab is immaculate), would I set the tile with modified thinset as well?

I'm a novice when it comes to this type of reno - so any and all advice is appreciated.
Attached Images
    
__________________
tilenoobie0
tilenoobie0 is offline   Reply With Quote
Unread 06-15-2019, 09:18 PM   #4
Davy
Moderator -- Mud Man
 
Davy's Avatar
 
Join Date: Jan 2003
Location: Princeton,Tx.- Dallas area
Posts: 31,673
Sometimes water will penetrate thick mud walls, sometimes it won't. I use felt paper behind my mud and lath just in case but I doubt there is felt behind your mud. It's up to you about using Redgard or other waterproofing. Yes, I would use a modified thinset.
__________________
Davy

www.davystephenstile.com
Davy 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
Tiling over concrete plaster walls? dreibs Tile Forum/Advice Board 5 05-22-2018 09:14 PM
Tiling Over Primered Plaster Walls drsmith33 Tile Forum/Advice Board 36 07-02-2016 08:48 AM
Tiling plaster walls jmilana Tile Forum/Advice Board 15 09-15-2012 08:26 AM
Tiling plaster shower walls perry1 Tile Forum/Advice Board 4 05-30-2012 11:46 AM
Tiling Over Plaster Walls Steve E Tile Forum/Advice Board 6 03-14-2012 06:05 PM


All times are GMT -6. The time now is 08:10 AM.


Sponsors

Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright 2018 John Bridge & Associates, LLC