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Unread 11-09-2019, 10:04 AM   #1
Matt L.
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Time sensitive help needed: Contractor Waterproofing Question

Contractor has framed, put up green board, and mud floated the floor and walls. Looks good, but I don't now squat about that method.

Am I to assume that mud layer is not waterproof?

He's coming back this AM to do the pan (mud deck???) and more work.

Should he be waterproofing next before tiling???

This is the wife and her decorator friend's deal. Previously I'd have done this using schulter system stuff. Now I just work all the time.

Thanks in advance!!!

Matt
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Unread 11-09-2019, 11:10 AM   #2
Fast eddie part deux
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What is under the mud bed? Sould be a thick vinyl sheet.
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Unread 11-09-2019, 11:14 AM   #3
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What are you building, Matt? A shower, perhaps?
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Unread 11-09-2019, 11:43 AM   #4
Matt L.
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Yes, it's a shower, thanks for pointing that out, kind of a key detail.

Doesn't really look like there is anything between the mud and the green board.

Here's a link to some pics. They're all rotated 90 degrees to the left, but I think it still gets the point across.

What should I require he do from here???

Thanks!!!!

Matt
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Unread 11-09-2019, 12:58 PM   #5
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You need to attach those photos from storage on your computer using the paper-clip icon above the Reply dialog box so they appear in your post and remain a permanent part of your thread, Matt.
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Unread 11-09-2019, 01:53 PM   #6
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I guess if he were going over all of it with a sheet membrane, it might work. But I think I see the lower part of a clamping drain in the floor, so I'd guess he isn't planning for that.

I guess the thing to do would be to ask him what the plan is to waterproof the shower. I don't see any evidence of it in your pictures.
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Unread 11-09-2019, 04:58 PM   #7
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Yep, post more pics of what he did today. Years ago, green board was considered a waterproof barrier but they finally got wise to that. He needs a waterproofing over the mud like Kevin said.
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Unread 11-09-2019, 05:03 PM   #8
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Appears he's long past the point of installing a traditional receptor. I'd start with Kevin's plan to ask him just how he plans to make you a waterproof shower, Matt.
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Unread 11-09-2019, 05:17 PM   #9
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Yep, I'd like to see a better picture of the drain.
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Unread 11-09-2019, 05:20 PM   #10
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I think I see parts of a half-wall in there. Possibly on the right side, facing in. You got any more pictures of that? They're notoriously unstable unless they're done correctly.
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Unread 11-09-2019, 06:45 PM   #11
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Green board? Waterproofing it ?
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Unread 11-09-2019, 08:53 PM   #12
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About the half wall (OT)

Quote:
They're notoriously unstable unless they're done correctly.
So what’s the correct method of doing a half wall? I had one in our dining room that always wobbled and needed constant patching until I finally took it down.
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Unread 11-09-2019, 09:03 PM   #13
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Depends on the structure. If you have a crawl space or basement, it can be secured to the framing below.

A slab is tougher to deal with. I usually recommend a post at the end. But securing the top framing of the wall within the intersecting wall helps. Sometimes sheeting it with plywood helps.
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Unread 11-10-2019, 07:37 AM   #14
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Mudding one side of the wall will stiffen it tremendously. I do scratch and browns so that might add more strength. When I mud both sides it feels like it was built outta brick.... which is also a good way to build one on a slab.

I've even built them with 2x4's sideways so my final mud was roughly 3-1/2" for a flush up with glass block when tiled. Trick there is using a pneumatic stapler to fasten the wire.
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Unread 11-10-2019, 08:08 AM   #15
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The weakest wall I’ve ever built, 2x4’s were sideways. I ran metal strapping around the top and screwed it into the wall on either side as to have the metal under tension. On the scratch I used a scrap piece of wood against the back wall to hold it plumb as it cured since it was so flexible.

After mudding, tiling and glass block was in, I could hit the top edge with my fist and had the same “feel” as stud under load in the middle of wall. The sheer mass of mudwork has many good properties overlooked in today’s lightweight options. It fixes many issues in remodeling that you encounter.
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