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Unread 07-05-2018, 08:35 AM   #1
026TB4U
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Shower mud pan without preslope

I decided to have a plumber move my drain and install a liner for my shower. I used goof proof quick pitch on top of the liner to slope the mud with a goof proof weep protector. What I hadn't realized is that a preslope should have been under the liner which the plumber didn't create.

It's too late to turn back now and I am ready to Redgard the Durock walls.

My question is, given my current situation, should I redgard the mud floor too?

Thanks.
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Unread 07-05-2018, 08:44 AM   #2
rmckee84
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It will minimize the amount of water that reaches the mud bed but the problem is that it is hard to seal where the redgard and drain meet. The best procedure for that is the divot method, but with the good proof lot in there I don't think you'll be able to dig out around the drain to do that. You're really at a crossroad of whether you want to risk it and hope for the best by just painting redgard on it or tearing it out and doing it properly.

Once you tile the pan you're committed, right now you can still turn back and do it right.
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Unread 07-05-2018, 09:13 AM   #3
026TB4U
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Does the goof proof ring allow me to unscrew the drain? To be honest I wasn't sure how that worked. Does the ring create a cavity between the threads and the mortar?

Thanks again.
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Unread 07-05-2018, 02:14 PM   #4
jadnashua
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In a typical clamping shower drain, the liner and waterproofing are outside of the adjustable part like in this diagram. The liner gets clamped and sealed between the bottom two pieces.
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Unread 07-11-2018, 11:01 AM   #5
026TB4U
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Yep, I understand that part but I was referring to this ring and if it creates a cavity inside the ring:
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Unread 07-11-2018, 03:24 PM   #6
jadnashua
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Water flows downhill. It pools when it sits on a flat surface. Plumbing code REQUIRES the waterproofing to be sloped a minimum of 1/4"/foot...neither the tile nor grout is considered waterproofing by codes or industry. It galls me that many inspectors will approve a liner flat on the floor if it doesn't leak...that's only half of its required functionality...it must TOTALLY drain as well in between uses, and that absolutely will NOT happen when it's flat.
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Unread 07-11-2018, 07:08 PM   #7
Davy
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Before I would add Redgard to the mudbed, I would bust up the mud and remove the pan liner and put down the preslope. You can do this yourself. Did the plumber add the glue-on corners on each side where the jambs meet the curb?
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