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Old 01-11-2010, 08:55 PM   #1
tilenovice
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Ceiling of Kerdi Shower

I thought I had everything figured out for my shower. Started thinking about the ceiling. First thought was to paint the drywall ceiling but then I thought I should tile everything. I am using the Kerdi system and orginally planned to stop at the ceiling with tile and kerdi. But now thinking kerdi and tile on ceiling would be the best way to go.

The ceiling does have a fantech diffuser/light with fan installed in attic.

Can kerdi be used on the ceiling? This will eliminate any moisture issues with paint in the future. Wife loves extra hot showers.

If Kerdi can be used on ceiling any tips or special requirements for install of Kerdi and tile on ceiling. Not sure of tile size but probably will go with something smaller to match the floor.

Tim
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Old 01-11-2010, 08:59 PM   #2
Brian in San Diego
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Tim,

You only need to kerdi to the height of the shower arm unless you are building a true steam shower. I stopped the kerdi at the shower arm but tiled up to the ceiling. I wouldn't hesitate to tile the ceiling without putting kerdi on it. If the ceiling is painted now then you should rough up the paint with 60 grit sand paper. I would also use a quality modified thinset.

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Old 01-11-2010, 09:02 PM   #3
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What do I have to do with the transition between ceiling and wall if no kerdi?

I figured the kerdi would span that corner/transition to help prevent cracking.

Do I need to spackle that ceiling to wall transition now if I do not use kerdi?

Tim
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Old 01-11-2010, 09:06 PM   #4
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Hi Tim, you would caulk that joint where the wall meets the ceiling if you tile it. If you don't tile it and you run the tile to the ceiling you don't hafta tape the joint.
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Old 01-11-2010, 09:08 PM   #5
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Hi Tim,
For my shower I opted to Kerdi and tile the ceiling. Not a steam shower but it gave me extra peace of mind to Kerdi it anyway.
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Old 01-11-2010, 09:30 PM   #6
tilenovice
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Joe,

That was my thought process. I always overkill everything. Can't hurt right?

Any special requirements or pointers for Kerdi ceiling and tiling the ceiling.

Tim
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Old 01-11-2010, 09:39 PM   #7
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Don't get thinset in your eyes!

Seriously - it will be a bit messy. I didn't have any problem getting the Kerdi or tile on the ceiling. My ceiling tiles are 6x6 so nothing fancy, jsut comb out the thinset on the ceiling and stik the tiles right on. Bigger tiles would benefit from backbuttering and adding a "ring" of thinset around the edges, acts like a suction cup.
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Old 01-12-2010, 12:28 PM   #8
tilenovice
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Kerdi Shower

I am doing a Kerdi shower using the Kerdi tray. I am using Ditra set to install Kerdi and install tiles.

1. Can I use Ditra-set to install the Kerdi shower tray?

2. Can I install the kerdi shower in any order?

Example:
I would like to install the Kerdi on the walls, then install the tiles on the walls. Leave bottom row out for future install of kerdi tray. Install tray and kerdi on top with all kerdi corners, etc. Then tile floor and finish wall. I know this will take a little longer this way.

If I do the entire shower with Kerdi, I am concerned of messing up the kerdi on the floor or the kerdi tray while tiling the walls.

How do others do this? Any ideas.

Tim

Last edited by tilenovice; 01-12-2010 at 12:41 PM. Reason: typo
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Old 01-12-2010, 12:39 PM   #9
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Many installers do it exactly as you described. It works just fine.
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Old 01-12-2010, 12:44 PM   #10
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Quote:
1. Can I use Ditra-set to install the Kerdi shower tray?
Schluter says use an unmodified so you will be good.

Quote:
2. Can I install the kerdi shower in any order?
as long a you follow the directions on how Kerdi is done you can.

Quote:
If I do the entire shower with Kerdi, I am concerned of messing up the kerdi on the floor or the kerdi tray while tiling the walls.

How do others do this? Any ideas.
I lay a piece of drywall or plywood down, I like doing each part at a time.
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Old 01-17-2010, 07:35 AM   #11
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Kerdi over Cement board

Starting kerdi shower install today. I previousy did my bathtub area 2 years ago with kerdi over cement board. I do not remember using the mesh tape under the Kerdi on the previous install. But checking my notes, it seems it might be required.

What is the install procedure for Kerdi over cement board, do I need to use akali mesh tape at seems or not?

Hoping to get a quick answer.

Tim
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Old 01-17-2010, 07:45 AM   #12
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No mesh tape required under Kerdi, it does the job of the tape. Remember to use unmodified thinset. Any more questions come on back.
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Old 01-17-2010, 08:05 AM   #13
tilenovice
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Thanks. Using Ditra-set so I am covered.

Tim
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Old 01-17-2010, 11:43 AM   #14
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Welcome back, Tim. I've combined your first three threads for this shower here. Please use this one for all your project questions so folks can see the history and what's been previously asked and answered. We can give it a more generic title any time you suggest one.
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Old 02-20-2010, 11:01 PM   #15
tilenovice
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Kerdi Drain and Tile

Last minute question - For the Kerdi Drain system, do you leave a space for grout between the grate and tile or do the tile butt right up against the drain grate with no gap or grout.

Watch the video and read the instructions and was not 100% clear.
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