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Unread 05-24-2020, 08:16 AM   #1
NorbB
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Joint on marble shower curb

My shower will have a two piece marble curb cap that meets at a 90 degree angle.

Questions:

1) Is there any reason not to cut each piece at 45 degrees to make the 90 degree corner (as opposed to a butt joint)?

2) How should I deal with the joint so it does not leak? Even though the curb base is pitched back toward the shower, the cap will extend about 5/8” on each side of the curb base and I am concerned that moisture will wick it’s way out of the shower. I am considering applying silicone caulking on the ends to seal the joint as I install the caps. Is there a better way?

Thanks for any insight you’re willing to share.

Regards,
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Unread 05-24-2020, 10:53 AM   #2
Davy
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Norb, the marble cap needs to be mitered so you can add pitch towards the shower.

Although the cap will shed water, it has nothing to do with your waterproofing. The shower should be able to be used and not leak before it's tiled. It's recommended to use silicone matching caulk at the ends of the cap and can be used in the miter.
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Unread 05-24-2020, 11:44 AM   #3
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Davy,
Thanks. You confirmed my thoughts. As for waterproofing, the entire pan, curb, and walls have beer red guarded (plus there is a liner under the mortar in the pan).

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Last edited by NorbB; 05-24-2020 at 11:45 AM. Reason: Typo
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Unread 05-24-2020, 05:46 PM   #4
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There's no need for Redgard on the shower floor if you have a liner under the mudbed. How did you make a positive seal to the drain with the Regard?
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