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Unread 03-04-2009, 07:37 PM   #1
slapappy
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tiled shower ceiling

What would be the largest tile that's safe to put on a shower ceiling? I've installed 4" and 6" before without bracing, and never had a problem. The job I'm on now, my customer just decided she wants the ceiling tiled with 8" ceramic, a 1/4" thick. There are a few can lights to be tiled around, so I'm thinking that after laying all of the tiles, the thinset will be halfway dry, and it will be too late for bracing. I know mastic would be an option, but I hate to work with it because of the mess.
Also, the ceiling is 5/8" greenboard fastened to metal channels on 24" centers, with the 3 ceiling edges supported by the cement board on the walls, and the other edge butted into the existing ceiling panel, with 1 x blocking fastened between joists. The guest bathroom has a tiled ceiling as well, with no apparent problems. I was just wondering about the weight of the tile with the existing joist span. Actually, they're not joists, but lightweight metal extrusions tied to steel trusses with wire. I hate the cheap construction of modern condos!

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Unread 03-04-2009, 07:44 PM   #2
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Welcome, slappapy. Please put a first name in a permanent signature line for us to use.

And if these last few threads are for the same project, we'd like to keep them in a single thread so folks can see what you're working on.

There is no limit to the size of tiles that can be installed on ceilings. Eight-inch tiles aren't yet even on the fringe of being large in that respect. Get full coverage with your thinset and you should have no problems.

My opinion; worth price charged.
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Unread 03-04-2009, 07:51 PM   #3
Levi the Tile Guy
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You mentioned it but I'll repeat it Stay away from mastic. Mastic and showers don't mix. I've done plenty of showers with bigger tile and haven't had to brace them either. Like cx said just make sure you have enough coverage and the tile will stay. Obviously use caution!
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Unread 03-04-2009, 07:53 PM   #4
The Kid
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Im confused here, Are you proposin to tile an acoustical ceiling.

If so, Id say its got NO writin all over it.

but as far as size, we do large tiles on the lid all the time.
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Unread 03-04-2009, 09:07 PM   #5
detroitMi
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ceiling tile

I've done 16x16 travertine and 12x12 slate ,marble granite before
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Unread 03-04-2009, 11:08 PM   #6
Snets
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My concern is the 24" centers, not the tile sticking. That's a lot of span for tiles on sheetrock.

I originally constructed my ceiling on 24" centers but I was talked into re-doing it (before I tiled).

I sleep better at night now.

But as far as the tile sticking with thinset, no problem. I tried to pull one of mine off (12") right after putting it up and I had a heck of a time peeling it off.....like a bug suction cup.
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Unread 03-05-2009, 06:40 AM   #7
ddmoit
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Snets brings up a good point. I'm not familiar with those channels you describe, but I believe that 24" is too much span for 5/8" greenboard.
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Unread 03-05-2009, 10:42 AM   #8
The Kid
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I agree with what the others are saying, your gonna want 16"oc max to support a tiled lid.
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Unread 03-05-2009, 11:06 AM   #9
Jim wood
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I believe those are sound channels that the rock is attached to, it is usually ran opposite of the joist, they are thin metal z channels and are held up with very few sheet rock screws one screw per Joist. I would be careful how much weight you put up there.
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Unread 03-05-2009, 12:00 PM   #10
cx
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Jim makes a good point there, (slapappy provides first name here). "Hat channel" is used frequently in my area for that sorta installation, and it can be adequately fastened for any ceiling application but very frequently is not adequately installed.

Like the others, I'd wanna have a real good look at that ceiling before I agreed to pewt tile on it.

My opinion; worth price charged.
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Unread 03-06-2009, 09:22 AM   #11
M.T.Pockets
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Hi all, (Markus hear) a quick question , im wanting to do my ceiling allso, using 18x18 travertine, its a small shower only 3'x4' . can i just use a 1/2 x 1/2 square notch trile and thinset with out bracing it over night ? Or should I be wearing a hard hat and steel toe boots !

Thanks !
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