question about Durock?

Reply

  #1  
Old 12-10-04, 06:45 AM
Member
Thread Starter
Join Date: Oct 2004
Location: usa
Posts: 44
Received 0 Votes on 0 Posts
question about Durock?

if products like durock only had one side, or if both sides were the same, then i would have no question.

i'm in the midst of preparing an upstairs bathroom's floor, walls, and ceiling for ceramic tile. the durock product is different from one side to the other. my reflex tendency is to adhere tile to the smooth side of the durock, since it is smoother than the rough side. on the other hand, the rougher side would provide a larger surface area to adhere tile to.

which side of Durock should be applied to face the tile? or does it depend on whether it's a floor, wall, or ceiling?

thanks.

bob
 
Sponsored Links
  #2  
Old 12-10-04, 08:51 AM
Member
Join Date: Sep 2003
Location: NYC
Posts: 1,615
Received 0 Votes on 0 Posts
go here

http://literature.usg.com/pdf/CB237.pdf

smoothe side for mastic , rough side for thinset
 
  #3  
Old 12-10-04, 10:29 AM
Member
Thread Starter
Join Date: Oct 2004
Location: usa
Posts: 44
Received 0 Votes on 0 Posts
thanks joneq, but now a follow up...

are the following statements correct:

thinset is for floor tile.
mastic is for walls and ceiling.

thanks.

bob
 
  #4  
Old 12-10-04, 11:28 AM
Member
Join Date: Sep 2003
Location: NYC
Posts: 1,615
Received 0 Votes on 0 Posts
Either one can be used in either place[theoretically]in the bathroom at least but thinset is ions in front of mastic for all applications where there is choice. Type 1 mastic[not type 2] is for floors. I would not reccomend to use it though. It is just not that much more trouble to use the thinset for the floors at least. Follow the directions on the bag and get latex modified or buy the admixture seperate.

http://www.rpminc.com/rpmdocs/Item342.htm

A picture is worth a thousand words.



http://www.thetiledoctor.com/howto/floorsinterior.cfm.

All of the above is IMHO
 
  #5  
Old 12-10-04, 01:41 PM
Member
Join Date: Oct 2004
Location: New Jersey
Posts: 1,132
Received 0 Votes on 0 Posts
Use thinset in all wet areas, shower walls, floors, and ceilings. Use mastic for dry area walls only. Thinset is much better than mastic for wet areas, areas subjected to heat, steam, and where compressive strength is needed. You cannot level with mastic, where as you can adjust thinset as you setting the tile to keep the installation flat. Mastic can re emulsify in wet locations, especially problematic with substrates that hold moisture, such as backer boards. You should also have a moisture barrier over the studs and drip edge or pan liner before installing your backer on the walls of a bath or shower surround.
 
  #6  
Old 12-11-04, 06:04 AM
Member
Join Date: Nov 2004
Location: allen park, mi
Posts: 187
Received 0 Votes on 0 Posts
How much does that matter???

I used thinset for shower walls against the smooth (mastic?) side of hardi backerboard. Will it hold??? Please say so!!! 12x12 tiles
 
  #7  
Old 12-11-04, 06:14 AM
Member
Join Date: Oct 2004
Location: New Jersey
Posts: 1,132
Received 0 Votes on 0 Posts
Oh my god, all your tile will come off with the first shower you take!!! Just kidding. Yes, you are fine. The only problems you will see are if the thinset was left to skin over before setting your tile or if there was excessive kiln dust on the back of the tile. Even so, it won't be subjected to the stresses of a floor tile. Hey, Hardi is smooth too. Betcha can't pull one off.
 
  #8  
Old 12-11-04, 08:02 AM
floorman
Visiting Guest
Posts: n/a
The rough side of the durock gives the thinset something to bite into and thus hold a little better.
I have never used the smooth side of the durock for anything other than something for the unit to sit on.Nit sying that what was sais here is not correct,but never paid any attention to that,i was always taught to put the rough side out
 
  #9  
Old 12-11-04, 08:46 AM
Member
Join Date: Oct 2004
Location: New Jersey
Posts: 1,132
Received 0 Votes on 0 Posts
I was just saying that since it was a wall, he'd be fine. I too always install rough side up and burn the surface before troweling my thinset.
 
  #10  
Old 12-13-04, 06:35 AM
Member
Thread Starter
Join Date: Oct 2004
Location: usa
Posts: 44
Received 0 Votes on 0 Posts
burn the durock surface???

what is meant by "burn the surface before applying thin set?"

bob
 
  #11  
Old 12-13-04, 07:23 AM
Member
Join Date: Oct 2004
Location: New Jersey
Posts: 1,132
Received 0 Votes on 0 Posts
Burning with thinset is using the flat side of the trowel to skim the area you are about to tile to ensure the area you are about to work has thinset fully embedded into those rough spots and to ensue a good bond of the thinset to the substrate.
 
Reply

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


Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: