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Old 09-07-2017, 09:01 AM   #1
Leah F.
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Wall tile substrate with a cast iron shower receptor/base

I am considering using a cast iron shower base. Specifically, the Kohler "Kathryn" K-9025-0 ( https://www.us.kohler.com/webassets/...010-L_spec.pdf ).

My question is what kind of wall tile substrate can be used with this type of base, mortar bed or hardi-board or both? I would prefer mortar bed so I need to be sure it is feasible before I purchase the base.

Thanks
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Old 09-07-2017, 09:45 AM   #2
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Welcome back, Leah.

Your link takes me to a sliding glass shower door page.
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Old 09-07-2017, 10:01 AM   #3
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Correct link to Kohler Kathryn K-9025:

https://www.us.kohler.com/us/Kathryn...ses/421221.htm

Cheers, Wayne
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Old 09-07-2017, 10:55 AM   #4
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I don't see any reason why a mortar couldn't be used for the walls. You could use any of the 3 that you listed assuming your walls are framed correctly. I would want to make sure that your wall framing is as plumb as possible before getting started.

You don't want to fix major out of plumb issues with mortar.

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Old 09-10-2017, 11:12 PM   #5
Leah F.
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Thank you. With a cast iron shower receptor, is it more important to keep walls plumb than if the shower floor were to be tiled?
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Old 09-10-2017, 11:14 PM   #6
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Thanks Wayne for putting in the correct product page for me.
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Old 09-11-2017, 07:35 AM   #7
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Not trying to derail but what would be the advantage of a mortar bed wall vs. something like Kerdiboard?
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Old 09-11-2017, 10:49 AM   #8
Leah F.
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FlyingScot, Yeah, I dunno the answer to that question--I just have to go with what the contractor prefers to use. Sounds like a more general topic.
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Old 09-11-2017, 10:57 AM   #9
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Roger that. Somehow I got the impression you were doing this yourself and for the life of me couldn't figure out why you would want to attempt a mortar bed on the walls when there were other options. I'm using Kerdiboard in my shower because I can handle it without help.
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Old 09-11-2017, 11:23 AM   #10
Leah F.
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FlyingScot, I have Kerdi board in my other bathroom. It's nice and lightweight and easy to cut. I didn't like the niches--I would have used a different ready made niche.
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Old 09-11-2017, 03:08 PM   #11
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Leah preferred a mud bed and so I think Travis was agreeing that a mud bed would work. But, the Kerdiboard will also work.
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Old 09-12-2017, 07:29 AM   #12
Leah F.
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Yes, Davy. The Kohler shower receptor only has instructions for a wall board application and my contractor prefers mud on the walls to board. The Kohler customer service did not know if mortar could be used with their cast iron shower floor flange and I thought it was an easy question for a tiling professional. Now I know I can use either, I can start planning the rest of the shower room. Thanks all for being out there and taking the time! Leah
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