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Unread 10-18-2009, 08:58 AM   #1
John-Charleston
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2x10 shower seat?

A friend has a shower in the house he's building and the tile guy built it with a 2x10 treated seat that the grout has already cracked. My buddy has stripped the tile and cbu off of the 2x10 and is wondering what's the best way to go from here. Is there a way to make the seat work staying with the 2x10 or does he have to rip that whole assembly out and work in some other kind of seat?

The tile guy is in jail on unrelated issues so he won't be coming back....

Thanks,
John
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Unread 10-18-2009, 09:14 AM   #2
johnfrwhipple
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Your tiled seat

It's hard to build a seat in a shower out of 2X material. If it wasn't waterproofed or even if it was lumber is always changing with moisture. Plywood is much more stable than 2X material but if you need to build with wood it should be a tank. Screw the B-Jesus out of it.

Better to build those benches out of cement and cinder blocks, brick and mortar.

My thought is that the PT Lumber is checking, cracked open the waterproofing (if it's there) and the problem will only get much worse.

No easy fix.


Good Luck
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Unread 10-18-2009, 09:17 AM   #3
TileArt1
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Hey John,

Pressure treated lumber is a no-no in shower construction. It will continue to move, swell, shrink, and basically destroy any type of tile placed over it. It needs to be taken out and replaced with something more suitable for a shower application. John mentioned a few - cinder blocks, brick, etc.
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Unread 10-18-2009, 09:17 AM   #4
Davy
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How the shower is waterproofed would determine which way I would go from here. Is there any poly or felt paper behind the CBU? Or did he just nail the CBU to the wood and tile to it?

I tore a shower out a couple months ago that had a seat made of 2x12's. The difference is they had pan liner wrapping it and a mud job over it. It was 27 years old and didn't leak anywhere. I'm with John and Roger though, I build mine out of concrete blocks.
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Last edited by Davy; 10-18-2009 at 09:38 AM.
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Unread 10-18-2009, 09:31 AM   #5
johnfrwhipple
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cement bench

Here is a picture of a cement shower bench.

In this one we where on a huge time delay and I didn't have the time for building in nicely out of brick and block. We made a quick form out of 3/4" plywood and 2X reinforcments. Humped up a ton of cinder blocks and quick set cement. We just mixed up 2 bags of cement and started filling the form. Once we had an inch on the bottom we placed diamond lath near the 2 side edges and used the cinder blocks to hold them in place. We kept adding blocks, broken blocks and cement. We kept the diamond lath 3/4" off the face of the forms and in 1 hour had the bench down.

Whole bench took 2 hours start to finish to build with me and my first year.

Good Luck

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Unread 10-18-2009, 09:52 AM   #6
Davy
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Can't tell from this pitcher but I wrap the walls around (behind) the seat with pan liner, draping it over the other pan liner then I wrap felt paper over all that. That keeps all the moisture inside the pan.
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Unread 10-18-2009, 10:47 AM   #7
John-Charleston
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Thanks all. My friend came to me today to borrow my wet saw and when he explained what he was doing I told him I thought it was a bad idea but that we could check here to be sure.

His situation is this...The shower had been fully completed with the bench seat being just a 2x10 spanning stud to stud and with tile mastic-ed on directly to the wood. Of course the tile was coming loose already and now, having seen some of the comments here (we searched the boards) he's on his way to cut out the 2x10 completely and decide where to go from there.

His options so far are to eliminate the bench seat completely and just patch the tile or to take out the 2x10 and install one or two of those pre-fab tiangular corner seats. If he wanted to build a seat that went down to the floor, would that be feasible with the floor and walls already being tiled? I can't imagine how he'd seal that.

I'm not sure how easy it will be to remove the 2x10 without damaging a lot of the tile but I guess he'll find out and see what he has to work with from there.

He's also having some problems with corners cracking and has been told that the corners should have been caulked instead of grouted so he's already gouged out the grout and intends to caulk instead. Again we did a search and the boards pointed us to the latisil caulk as a good choice for this.

I've not seen the shower completed yet but it's obvious the guy who did it was a hack. As I understand it, he used cbu over studs with no moisture barrier and he used some sort of pre-mixed thinset/mastic to set the tile.
My friend had asked me to do the job but I felt I would be too inexperienced to take on a shower. Now I feel badly that I didn't take the job on myself as I'm sure I would have done better with the guidance from this board.

Thanks,
John
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Unread 10-18-2009, 03:35 PM   #8
Edthedawg
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JOhn,

I think you know there's a whole lotta Wrong in the details about your friend's shower. Caulking those corners ain't gonna be much more useful than rearranging deck chairs on the Titanic, I'm afraid

It's gonna be taking on water from the other 99% of the wall area

Mastic - anything pre-mixed - and no waterproofing... that 2x10 bench is the least of his worries, it seems
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