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Unread 09-21-2007, 09:02 AM   #1
Yaknvdub
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CBU to drywall transition question

Hello all, my name is Paula and I'm in CT. I am a long-time lurker, first time poster. I've gotten a lot of great advice from this forum during the course of our current bathroom remodel. I've also gotten a lot of information from John Bridge's Ceramic Tile Setting book.

Short summary of our project: my hubby and I are doing a complete, to-the-studs remodel of the bathroom in our 60's ranch house. Bath was a pink and black tile nightmare and consists of a tub, toilet and sink. The walls had tile wainscots which we will do in the remodel as well. The new tile will be simple, white 6" ceramic tiles with a blue border and a row of 4.24" blue diamonds.

Currently we have the CBU (Hardibacker) and drywall installed. I've taped all of the CBU to CBU joints with alkalai-resistant mesh tape and thinset, but my question is this:

What do I use to join the CBU to drywall? Thinset or joint compound?

Thank you for your help!

Paula
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Unread 09-21-2007, 09:18 AM   #2
Dave Taylor
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Hi Paula.....

Thank you for 'lurkin' and congradulations on your first post.

If it's a dry area (outside the shower) where CBU and drywall meet.... you may use joint compound.

You may use thinset in either case.

Hope that helps.
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Unread 09-21-2007, 09:19 AM   #3
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Hi Paula, welcome to the forum.

As a general rule, use thinset and CBU tape in the wet areas under the tile and use drywall mud and drywall tape in dry areas. Both methods are suitable for tiling. Good luck with your project.
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Unread 09-21-2007, 09:29 AM   #4
Yaknvdub
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Thank you, Marge and Dave!

Since part of the installation is in the tub surround and part is the bathroom walls, I will just use thinset and CBU tape throughout. Might as well mix one product instead of two!
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Unread 09-21-2007, 11:04 AM   #5
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Paula,

Is the CBU and the drywall in the same plain? In other words, are the level with each other?

If not you will need to either removed the CBU where it butts to the drywall and shim it out, or you'll need to use thinset to taper the CBU up to the drywall.

Dan
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Unread 09-21-2007, 11:09 AM   #6
Yaknvdub
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Quote:
Is the CBU and the drywall in the same plain? In other words, are the level with each other?
Dan,
Yes, the drywall and CBU are in the same plain. It's the transition from the tile wainscot to drywall.
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Unread 10-04-2007, 09:42 AM   #7
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Grouting question

Many thanks to those who helped with my last questions. I am hoping for help with another

I've gotten my walls and floor tiled in my bathroom remodel and it's time to grout. My question is this, I will be leaving for a week on Saturday which leaves me two days to grout everything. My husband will be around to mist the grout while I'm gone. Is it okay to wait 8 days before I seal the grout?
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Unread 10-04-2007, 09:46 AM   #8
Yaknvdub
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Here's a pic of the tub surround in progress.


I know my niche isn't centered, the studs were not spaced well so I had to make due
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Unread 10-04-2007, 03:59 PM   #9
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Hi Paula. Glad you joined us.

Waiting 8 days to seal the grout is not a problem. I'm assuming it won't be used during that time.

Do you think misting the grout is necessary? Most don't.

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Unread 10-05-2007, 06:40 AM   #10
Yaknvdub
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Quote:
Waiting 8 days to seal the grout is not a problem. I'm assuming it won't be used during that time.
That's correct, the bath won't be used before it's sealed.

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Do you think misting the grout is necessary? Most don't.
Glad to hear you say that, Mike. In my haste to get out of the house this AM, I forgot to mist. I'll probably do it when I get home tonight because I figure they must have put it in the directions for some reason


Thank you for your help I can finally see the light at the end of a long remodel tunnel!
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