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Unread 11-12-2009, 12:44 AM   #1
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Cultured marble shower pan suggestions

On the pending jobsite the planned 7'x5' kerdi shower pan was replaced with a cultured marble pan. I didn't know or get a vote. The pan will be installed from stud to stud, drywall just above it. The CM fabricators gave me a whole 1/2" flange above the pan floor to work with. The pan looked nearly flat as I saw it on the truck ready for install as I was leaving Tuesday.

I was planning on kerdi over drywall for the walls (and floor) until this showed up. Any suggestions on how to make a waterproof seal between the walls and the pan? I was wondering of Kerdi fix between the wall fabric and the pan lip would be enough. That thought scares me since its 1/2" overlap at most.

The house is brand new construction, 2nd floor install, properly framed. I can throw a fit and have the CM guys add to the flange, but the pan will have been installed by the time I return the to job site. Is there some way I can add to the flange? The less the CM guys do the better. I have enough gray hair.
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Unread 11-12-2009, 04:19 AM   #2
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Approach it like you would a tub surround, its just a really really shallow tub. KerdiFix the seam at the base should be fine.
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Unread 11-12-2009, 08:18 AM   #3
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I was thinking that but.... tubs normally have a small lip then a drop to the main tub area that holds the water, leaving the lip well above the standing water line. This particular installation makes me nervous.
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Unread 11-12-2009, 09:05 AM   #4
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Here's my question.... How would you do it whether it was Kerdi, Cement board or floated ? There a 1/2' lip to work with thats it. It would be the same way for each of the other situations too. I would leave the drywall high and kerdi-fix that gap before I Kerdi the shower.

By the way the ones I have seen have a galvanized metal lip that went up 2-3 inches not just a lip like the tubs have.
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Unread 11-12-2009, 09:11 AM   #5
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I've never seen a shower set up quite like that, Paul, and I'd not want my name on it at all.

Especially on the second floor. How is the drain set up on the thing? The drains on the ones I usually see are poor. The only way they get away with it is being on SOG and just not worrying about leaks. I've posted photos of one such on here in past. Pretty gross.

And how do they expect to meet code with this sort of "receptor"?

My opinion; worth price charged.
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Unread 11-12-2009, 09:28 AM   #6
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I get back to the job site Friday morning and can post pics Friday evening, maybe lunch time if possible. Luckily we have a few days before we start in that shower.

I am not liking this whole thing. I don't remember seeing a curb on that pan either, but then again it was setting on the truck when I looked at it. If there is no curb I think I will tell them to rip the POS out and I'll set my own pan so I can sleep at night.
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Unread 11-12-2009, 02:38 PM   #7
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Quote:
Originally Posted by Paul
The CM fabricators gave me a whole 1/2" flange above the pan floor to work with.
This part tells me that the plastic folks had new guys on the job who didn't know what they were doing. Never seen anything like that.

If, on the other hand, that's what their specs recommend, then they should have detailed specs on making that nonsense watertight so it can pass a flood test and last.

Quote:
Originally Posted by Paul
This particular installation makes me nervous.
I wouldn't ignore this part if it were me.
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Unread 11-12-2009, 02:50 PM   #8
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A 1/2" lip is more than I get on the custom receptors available here. Bring the Kerdi down to the deck and Kerdi-fix it on.. It'll be fine. The cast iron tubs have the same 1/2" lip, what makes this so different?

CX- the custom receptors I use weigh 100lbs for a 36" neo angle. The last tub replacement pan I used (32x60) was close to 200 lbs. The drain hole area is very stout, and Im not worried about the 2" brass drain coupling leaking at all...
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Unread 11-12-2009, 03:01 PM   #9
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That 1/2" above the receptor floor is how your receptors are made Alex?
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Unread 11-12-2009, 03:16 PM   #10
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Could that be right? Maybe it's just a typo... What kind of shower pan could only have a 1/2" wall? (curb, sides, etc) That's not a shower receptor, it's a flat piece of plastic!

No, mine are not like that at all.. The receptors I get have 2-3" high side walls,(and about 1 1/2" wide) but no flange on top of that.
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Unread 11-12-2009, 03:20 PM   #11
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Right, picture a flat piece of plastic with a half inch lip. I'll take pics friday. One of my guys doesn't remember seeing a curb either.
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Unread 11-12-2009, 03:26 PM   #12
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You guys are thinking plastic, but it's cultured marble. Faux marble, fake marble.
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Unread 11-12-2009, 03:30 PM   #13
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Would kerdi fix stick to cultured marble?
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Unread 11-12-2009, 03:35 PM   #14
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Cultured marble is typically ground stone suspended in plastic. I know Nobleseal TS is bonded for underwater use w/2 beads of Noblesealant. That's some good sticky stuff. May want to check CIS bonding install instructs.
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Unread 11-12-2009, 03:43 PM   #15
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Kerdi-fix is excellent pooky, and it will definitely bond Kerdi to Cultured Marble.

Dana, the cultered marble I'm thinking of is marble dust mixed with white cement. The surface is a resin (plastic) gel coat. I only wanted to distinguish it from the flimsy plastic receptors that flex. Not saying it's any better, just different.
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