Waterproofing A Curb On Existing Concrete Shower Pan - Kitchen & Bath Remodeling - DIY Chatroom Home Improvement Forum
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Old 01-11-2016, 12:11 PM   #1
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Waterproofing a curb on existing concrete shower pan


Hi everyone. So I am planning a remodel on our basement bathroom which has a corner shower and a concrete pan that rises up a couple of inches or so. There is no curb, and I would like to add one. In looking around at some tutorials, I see that you would normally build it up with 2x4's and then cover everything with a membrane and pour the pan over top. I am struggling to determine what to do though since I cannot run a membrane under the pan.

I am considering just running a little edge of membrane off of the curb into the pan a few inches and gluing it/covering it with quickset, then covering it all with RedGard. I don't really know what else to do shy of tearing out the pan and starting over. Any suggestions?
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Old 01-11-2016, 02:34 PM   #2
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I would lay a couple courses of brick as a curb, and fill the holes with mortar.

Where the curb meets your concrete pan, I would put some joint tape here and thinset. Apply a liquid membrane waterproofer over the curb and lap it over the joint. Two coats.

Now tile over the curb. Terminate your tile past the joint where the curb mets the pan. Now grout with urethane or epoxy.
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Old 01-11-2016, 07:19 PM   #3
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Thanks again cleveman! I have not heard of using brick until now, but I just did a quick google and it seems to be a common option. Sometimes I just need to know what to search for.

Thank you again for your help.
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