Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Flooring

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 09-14-2008, 10:00 AM   #1
Newbie
 
Join Date: Sep 2008
Posts: 5
Rewards Points: 10
Default

Shower floor grout cracking


Six months after installing a tile floor in our shower the grout began to crack. We removed the grout and let it dry for a month because water had gotten under the tiles then we re-grouted the floor with sanded grout (the first time we used unsanded) and used a different sealer recommended by the tile store. It has been 2 weeks since we started using the shower and the grout is cracking again. This is occurring mostly in one area of the shower. Any suggestions?

radnrs is offline   Reply With Quote
Old 09-14-2008, 10:26 AM   #2
the Musigician
 
DangerMouse's Avatar
 
Join Date: Jul 2008
Location: I'm right here!
Posts: 10,404
Rewards Points: 2,000
Default

Shower floor grout cracking


perhaps the water underneath the tiles has weakened them to the point they shift? what is underneath the tiles? how did you mount them? you may have to pull them and redo the job. i'll no doubt get poopooed on this, but in one case, i used black waterproof caulking to 'grout' them and it's still leak free years later. (she wanted it that way, so who was i to argue?) but hey, it worked....

DM

DangerMouse is offline   Reply With Quote
Old 09-14-2008, 10:30 AM   #3
Tileguy
 
Bud Cline's Avatar
 
Join Date: Mar 2006
Posts: 10,395
Rewards Points: 2,438
Default

Shower floor grout cracking


Tile is not waterproof.
Grout is not waterproof.
Tile and grout together are not waterproof.

So...water under the tile is natural. Doesn't matter which grout is used, makes no difference.

I suspect you have one of two possibilities taking place - maybe both. In either event, the shower is improperly constructed and you need to call the installer.
Bud Cline is online now   Reply With Quote
Old 09-14-2008, 11:08 AM   #4
Newbie
 
Join Date: Sep 2008
Posts: 5
Rewards Points: 10
Default

Shower floor grout cracking


We installed the floor ourselves. Although we have done other tile projects, floors and shower walls, we had never installed a shower floor so we went with a custom tile ready shower base from "Tile-Basin". It is an upstairs shower so the floor under the base is wood. We installed the base as recommended with thin set under the base and ensured that it was solidly embedded in the mortar. We used tile mastic on top of the shower base and installed the tiles. The grout did not just crack it broke up and came out of the joints. I understand that some water gets under the tiles, but we unfortunately didn't notice the cracks right away and the tiles actually lifted up some in the area this happened. It's a small shower 4' x 2.5' and this is happening on the end where the shower head is. I'm thinking maybe we are having movement of the floor, why else would the grout have started cracking this soon after it was redone.
radnrs is offline   Reply With Quote
Old 09-14-2008, 11:21 AM   #5
Tileguy
 
JazMan's Avatar
 
Join Date: Feb 2007
Location: Troy, Michigan
Posts: 4,105
Rewards Points: 2,068
Default

Shower floor grout cracking


MASTIC? You used mastic? Why on earth did you do that?

Start by removing all the tiles and mmmmastic. Get the base clean like when it was new. Start over.

Jaz
__________________
Tile 4 You LLC Troy, MI

DITRA Installs - KERDI Watertight-Mold-Free Showers. I have NEVER made a mistake, I thought I did ONCE, but, I was WRONG! A+ BBB rating - est. 1987 - over 50 yrs. exp.
JazMan is offline   Reply With Quote
Old 09-14-2008, 12:03 PM   #6
Newbie
 
Join Date: Sep 2008
Posts: 5
Rewards Points: 10
Default

Shower floor grout cracking


My husbands idea. I'm a direction freak and the directions with the base said thin set. What should we have used.
radnrs is offline   Reply With Quote
Old 09-14-2008, 12:17 PM   #7
Newbie
 
Join Date: Sep 2008
Posts: 5
Rewards Points: 10
Default

Shower floor grout cracking


I found the container from tile adhesive. It was AcrylPro ceramic tile adhesive. My husband called it mastic. Sorry but I don't know if they are one in the same.
radnrs is offline   Reply With Quote
Old 09-14-2008, 12:26 PM   #8
Registered User
 
Termite's Avatar
 
Join Date: Apr 2008
Posts: 6,520
Rewards Points: 2,000
Default

Shower floor grout cracking


You should have used thinset. I presume that the product you mentioned is a mastic, although their website doesn't specifically call it that. It certainly isn't thinset.

You do need to tear up the entire floor and start over. Use bagged thinset mortar this time, not the pre-mixed stuff.

Also, I'm assuming (and hoping) that your shower floor substrate included some sort of drain membrane or pan to collect water that will inevitably penetrate the tile and direct it to the drain???

No amount of sealant will keep water from getting past your tile and grout. You just have to plan on it and use materials that won't degrade.
Termite is offline   Reply With Quote
Old 09-14-2008, 12:27 PM   #9
Guest
Guest
 
Posts: n/a
Default

Shower floor grout cracking


Mastic is an acrylic tile adhesive. Same thing. Mastic is absolutely not to be used in high moisture areas.
  Reply With Quote
Old 09-14-2008, 12:49 PM   #10
Tileguy
 
JazMan's Avatar
 
Join Date: Feb 2007
Location: Troy, Michigan
Posts: 4,105
Rewards Points: 2,068
Default

Shower floor grout cracking


AcryPro is mastic, and not a very good one either. It's fine for a kitchen backsplash or other vertical dry areas. You shouldn't use any mastic for showers, even walls. Floors are absolutely out of the question. Says so on the container too.

Jaz
__________________
Tile 4 You LLC Troy, MI

DITRA Installs - KERDI Watertight-Mold-Free Showers. I have NEVER made a mistake, I thought I did ONCE, but, I was WRONG! A+ BBB rating - est. 1987 - over 50 yrs. exp.
JazMan is offline   Reply With Quote
Old 09-14-2008, 01:33 PM   #11
Tileguy
 
Bud Cline's Avatar
 
Join Date: Mar 2006
Posts: 10,395
Rewards Points: 2,438
Default

Shower floor grout cracking


THAT "Tile Basin" product is "one poorly designed product" in my appraisal. So-be-it, it's done now.

The mastic was the big mistake. The instructions say "use thinset" and you didn't do it.

The next problem is the flimsy basin itself. The instructions say to install it in thinset but the unit may have a little warp in it based on what the one in the website photo looks like. The basin pictured in their website photos looks sort of cheesy. They show it being driven over by a car. Unless you plan on driving your car into your shower that's a stupid way to try to sell a shower receptor. Thinset won't take out the "quality control warp" that I suspect your unit has and thinset won't support the resulting voids that may occur under the unit. Movement in the substrate means loose and cracking grout and tile. Period.

Take out all of the tile and remove all of the AcrylPro. Check the basin for flexing. If there is even the slightest flex (and I'm betting there is) then remove the basin. It should be thrown away at that point and another method adopted. If you try to reuse the basin IT MUST BE FIRMLY INSTALLED WITH NO FLEXING. The tile is then installed with thinset according to the instructions that come with the unit.
Bud Cline is online now   Reply With Quote
Old 09-14-2008, 09:49 PM   #12
Newbie
 
Join Date: Sep 2008
Posts: 5
Rewards Points: 10
Default

Shower floor grout cracking


Thanks for your help. I guess we will be starting over with the floor.

radnrs is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
redoing basement shower - basic questions (relocating drain/options I have) mslide Plumbing 5 10-28-2008 11:42 AM
very low shower head flow rickard681 Plumbing 7 10-08-2008 07:43 AM
All shower fixtures loose, what to do? darsunt Plumbing 4 06-06-2007 01:01 PM
Bathroom Shower Help - PLEASE :) OTEJUNK Remodeling 5 05-09-2007 11:33 AM
Cracking Grout Between Shower Tiles average General DIY Discussions 9 05-08-2007 03:20 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.