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-   -   Bathroom Redgard Confirmation (http://www.diychatroom.com/f84/bathroom-redgard-confirmation-137722/)

hboogz 03-21-2012 09:00 AM

Bathroom Redgard Confirmation
 
2 Attachment(s)
I've read this thread: http://www.diychatroom.com/f103/exte...lating-119170/ and a few others, but have a question that didn't get specifically answered in various threads.

Attached are images of the bathroom i'm working on. I did R15 on the wall facing the exterior and only plan to put tile up until the line where the cement board meets the greenboard (both are flush). The million dollar question is do I redgard the entire wall, inclusive of the green board ? and the ceiling, which is also greenboard, above the shower ? Since i just plan on painting above the tile line, how does the primer and paint adhere directly ontop of the redgard? Since to my understanding the redgard turns dark red when it dries. If you can't already tell, I haven't used redgard before.

Also, is it necessary to mud the seams with thinset? I have the fiberglass mesh tape, wondering if i could use something else asides thinset, since i'll already be using thinset to set the tile? Also, I know joint tape is usually best for corners, should i use the joint tape at the upper corners or just use the fiberglass mesh tape all around ?

Thanks to all.

Blondesense 03-21-2012 12:09 PM

Quote:

Originally Posted by hboogz (Post 882124)
I've read this thread:The million dollar question is do I redgard the entire wall, inclusive of the green board ? and the ceiling, which is also greenboard, above the shower ?

Just Redgard the durock, not the greenboard. The line between the two should be well above where any water will directly hit.

Quote:

Originally Posted by hboogz (Post 882124)
Also, is it necessary to mud the seams with thinset? I have the fiberglass mesh tape, should i use the joint tape at the upper corners or just use the fiberglass mesh tape all around ?

Yes, you need to mud and tape the seams. Use drywall products for the greenboard, and thinset with the correct tape for the durock. Since you will be using Redgard, you want to make this as thin as possible. It is also a good idea to take a spray bottle of water and wet the durock first as it will suck the moisture right out of the thinset.

Edited to add: If Bud or Jaz were here, they would probably tell you you don't have near enough screws in the durock.

hboogz 03-21-2012 02:00 PM

Quote:

Originally Posted by Blondesense (Post 882225)
Just Redgard the durock, not the greenboard. The line between the two should be well above where any water will directly hit.



Yes, you need to mud and tape the seams. Use drywall products for the greenboard, and thinset with the correct tape for the durock. Since you will be using Redgard, you want to make this as thin as possible. It is also a good idea to take a spray bottle of water and wet the durock first as it will suck the moisture right out of the thinset.

Edited to add: If Bud or Jaz were here, they would probably tell you you don't have near enough screws in the durock.

Thanks for the confirmation. As far as the screws, before i put up the redgard, i'll put up some more. Any particular reason why i need more just on the durrock ?

Blondesense 03-21-2012 03:44 PM

Quote:

Originally Posted by hboogz (Post 882311)
Thanks for the confirmation. As far as the screws, before i put up the redgard, i'll put up some more. Any particular reason why i need more just on the durrock ?

Any flex or movement can cause tiles to pop off or crack, grout to break up, and general failure.

rightit 03-21-2012 08:27 PM

1 Attachment(s)
http://www.usg.com/rc/installation-a...e-en-CB237.pdf

From page 5:

Attachment 47912

oh'mike 03-22-2012 05:47 AM

Use tilers mesh tape---not drywall tape ---the drywall tape will break down when embedded in thinset--

hboogz 03-22-2012 09:11 AM

Quote:

Originally Posted by oh'mike (Post 882774)
Use tilers mesh tape---not drywall tape ---the drywall tape will break down when embedded in thinset--

The plan is to use the mesh tape for the seams and corners where the durock is meeting the greenboard and all the corners. I planned on using drywall tape for the greenboard areas alone. opposite wall, ceiling, wall behind the sink + toilet, etc.

hboogz 03-22-2012 09:16 AM

Quote:

Originally Posted by rightit (Post 882588)


Thanks. I'm a newbie, so i apologize in advance, but when the link indicates to Space Fasteners 8" on center - what exactly does that mean i should do in context to the pictures attached ? attach more screws 8" apart from each other ?


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