Tiling Over Control Joint - Flooring - DIY Chatroom Home Improvement Forum
Advertisement


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


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

Reply
 
Thread Tools Display Modes
Old 02-17-2015, 03:06 PM   #1
Member
 
Join Date: Jan 2011
Posts: 263
Rewards Points: 236
Default

Tiling Over Control Joint


So, I am planning to tiles my basement.

The concrete is 10 years old and it has a control joint.
It is my understanding is that I need to put a crack isolation membrane over the joint prior to tiling. My plan is to lay the tiles so that the grout line is over the joint.

Attached are pictures of the control joint. It has about 1" width and 1/2" depth.

My questions are:
* do I need to fill the joint with something (e.g. mortar) prior laying the crack isolation membrane?
* Do I need to apply crack prevention (e.g. RedGard) below the membrane prior to applying the mortar and then tiles?
* How wide of membrane does it need? Is it just enough to cover the joint (e.g. 6" on each side)?

Thanks!
Tiling Over Control Joint-control-joint.jpgTiling Over Control Joint-control-joint-2.jpg

Advertisement


Last edited by 325_man; 02-17-2015 at 03:08 PM.
325_man is offline   Reply With Quote
Old 02-17-2015, 06:17 PM   #2
Tileguy
 
Bud Cline's Avatar
 
Join Date: Mar 2006
Posts: 10,705
Rewards Points: 558
Default


That thing looks awful wide to be a control-joint. Are you sure it isn't an expansion-joint?

When covering a control joint the material used should reach out by two full tiles, depending on what product you are using.

On the other hand, expansion joints must be honored through the surface of the tile.

Advertisement

__________________
XXX
Bud Cline is offline   Reply With Quote
Old 02-17-2015, 07:50 PM   #3
Member
 
Join Date: Jan 2011
Posts: 263
Rewards Points: 236
Default


Quote:
Originally Posted by Bud Cline View Post
When covering a control joint the material used should reach out by two full tiles, depending on what product you are using.
Do I need to fill the gap there with anything?

Quote:
Originally Posted by Bud Cline View Post
That thing looks awful wide to be a control-joint. Are you sure it isn't an expansion-joint?
My understanding between control joint vs. expansion joint is that

A control joint is a continuous vertical joint filled with mortar, but with a bond breaker on one side so that tensile stress cannot develop across the joint.
In other words, it is basically a groove cut into the surface of the concrete that allows some cracking to occur in the joint and not be readily visible.

An expansion joint is a continuous vertical or horizontal joint, left completely free of mortar and filled with elastomeric sealant to keep it watertight. In other words, it is between two separate pieces of concrete or between concrete and another material.

Mine seems to be a control joint as it is a continuous filled with mortar and there is no gap (other than the crack) and no elastomeric sealant in the joint.

Having said that, I don't see any other joint in the whole basement.

Last edited by 325_man; 02-17-2015 at 07:54 PM.
325_man is offline   Reply With Quote
 
Old 02-18-2015, 02:42 AM   #4
Member
 
Join Date: Feb 2014
Posts: 2,424
Default


I would tile to the joint then caulk.
ron45 is offline   Reply With Quote
Old 02-21-2015, 07:11 AM   #5
Member
 
Join Date: Jan 2011
Posts: 263
Rewards Points: 236
Default


Have you all try product like Schluter Surface Movement Join?
325_man is offline   Reply With Quote
Old 02-21-2015, 09:44 AM   #6
Tileguy
 
Bud Cline's Avatar
 
Join Date: Mar 2006
Posts: 10,705
Rewards Points: 558
Default


Quote:
Originally Posted by 325_man View Post
Have you all try product like Schluter Surface Movement Join?
What is; "Schluter Surface Movement Join"? Never heard of it! How about providing us with a link to "Schluter Surface Movement Join".
__________________
XXX
Bud Cline is offline   Reply With Quote
Old 02-21-2015, 04:11 PM   #7
Member
 
Join Date: Jan 2011
Posts: 263
Rewards Points: 236
Default


Quote:
Originally Posted by Bud Cline
What is; "Schluter Surface Movement Join"? Never heard of it! How about providing us with a link to "Schluter Surface Movement Join".
http://www.schluter.com/4_20_dilex_bt.aspx
325_man is offline   Reply With Quote
Old 02-21-2015, 05:09 PM   #8
Tileguy
 
Bud Cline's Avatar
 
Join Date: Mar 2006
Posts: 10,705
Rewards Points: 558
Default


Quote:
Originally Posted by 325_man View Post
Well why didn't you say so? That product has been around for many years.
__________________
XXX
Bud Cline is offline   Reply With Quote
Old 02-21-2015, 06:03 PM   #9
Member
 
Join Date: Jan 2011
Posts: 263
Rewards Points: 236
Default


Quote:
Originally Posted by Bud Cline
Well why didn't you say so? That product has been around for many years.
So, is this better than using crack isolation membrane?

Thanks!
325_man is offline   Reply With Quote
Old 02-21-2015, 06:29 PM   #10
Member
 
Join Date: Feb 2014
Posts: 2,424
Default


Your money.
I would tile up the joint and caulk it.

Advertisement

ron45 is offline   Reply With Quote
Reply


Thread Tools
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
Cultured Stone Veneer and Fireplace Mantels- Joint or No Joint? Irish916 Concrete, Stone & Masonry 3 09-04-2014 08:47 PM
Soldered Copper - Bad Joint? alfer Plumbing 5 03-23-2013 10:02 AM
Dishwasher Control Panel Zen Nomad Appliances 0 10-02-2010 11:00 AM
Concrete floor prep for ceramic tile tpanc13 Flooring 39 06-22-2010 08:50 PM
Ceiling Fan Speed Control czars HVAC 0 01-14-2010 08:06 PM




Top of Page | View New Posts

 

Search Engine Friendly URLs by vBSEO 3.6.1