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Unread 08-13-2022, 11:37 PM   #1
webdood90
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Fix an unlevel curb - float with heavy set mortar?

Hi all,

I've made some foolish decisions with a bathroom remodel.

My situation is that my floor is flat, but not level. My walls are plumb. I've tiled my floor, except a 5x3 shower pan built with Kerdi Curbs / Pan. I'm really struggling with with this part due to poor prep.

After laying kerdi band, my curb is lumpy and not very flat. Pair that with the fact that it's not level, I'm struggling with what to do.

I will be having a glass enclosure installed. I was originally under the impression that the enclosure could be custom formed to fit my wonky setup but after further research, that doesn't seem to be the case.

The best that I've come up with is floating the curbs with a heavy set mortar to level (up to ~3\4in) and then tiling over it. Is that going to work? Can I feather such materials to such a low thickness on the level side, and is it appropriate to put over a Kerdi curb? Will it be able to support the weight of a glass enclosure?

I can't start over - I have ditra heat installed already on my pan and I can't imagine throwing that all out.

I really appreciate your time - thanks!
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Unread 08-13-2022, 11:47 PM   #2
webdood90
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Attached a progress pic for reference. Please don't judge too harshly!
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Unread 08-14-2022, 06:54 AM   #3
Davy
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I've never installed a foam curb but I see no reason why you can mud over it with a thin layer of thinset and then fat mud over that. The thinset would be used as a bonder for the mud to stick to the foam. Thinset alone won't work that thick.

I would find the high spot on the curb and barely have mud there. I clamp straight boards (1x3's or 1x4's) on the inside and outside of the curb using bar clamps. Make sure you have a 1/8-3/16 pitch towards the drain on top of the curb. Boards will make it a breeze once you get it all set up.

Get the fat mud and thinset made up. Spread a 1/8 layer of thinset on the curb and immediately place the fat mud over it while the thinset is still wet. Fill it to the top of the boards and strike off the extra mud using a trowel or straight edge of some sort.
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Unread 08-14-2022, 06:57 AM   #4
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I found a picture that might help.
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Unread 08-14-2022, 08:39 AM   #5
webdood90
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Excellent, thanks Davy. This is basically what I had in mind.

Any recommendation for the type/brand of fat mud to use?

Edit: Nevermind, I found examples in the liberry
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