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Old 09-03-2013, 08:54 PM   #1
Hosejockey61
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Yep, another shower pan question

I have looked at the liberry for shower construction over and over and my eyes are bleeding....okay maybe not that bad.

Looking to do deck mud over slab. I can find all sorts of info that seems to vary. Do you not need a slip sheet in this application? From what I can gather, it's simply thinset and then deck mud before the thinset dries. Is there still a need for metal lath?

Thanks
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Old 09-03-2013, 09:02 PM   #2
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Mike,

Welcome to the forum.

Since this is going over a ceement slab is it safe to assume this is SOG - slab on grade?

How thick a mud bed were you fixin to add?
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Old 09-03-2013, 09:10 PM   #3
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Yes SOG, looking to do a normal mud bed over PVC liner. Normal as in 1" to 1 1/4" at the drain as shown in the liberry.
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Old 09-03-2013, 09:11 PM   #4
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Welcome back, Mike.

For a bonded mud bed over a concrete SOG you do not need any metal lath, just the slurry of thinset mortar or pure Portland cement as a bonding agent. The shower pre-slope is not technically a real bonded mud bed, but we do'em that way anyhow.

The minimum thickness of the final mud bed on top of your liner according to ANSI standards is 1 1/2 inches.

My opinion; worth price charged.
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Old 09-03-2013, 09:23 PM   #5
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Ah ok....thanks guys!
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Old 09-03-2013, 09:56 PM   #6
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One more question for you wizards....how do you get the PVC membrane to stick to the outside of the curb if it's concrete? Should I just bend the metal lath tight and call it good?
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Old 09-03-2013, 10:23 PM   #7
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You can nail it on the outside, but yes we give the lathe a gentle squeeze so it holds everything in place.
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Old 09-03-2013, 10:51 PM   #8
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but the curb is concrete...so nailing isn't an option
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Old 09-03-2013, 10:56 PM   #9
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Gently squeeze the lathe to hold everything in place
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Old 09-03-2013, 11:37 PM   #10
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Mike, if you'll visit our Liberry and find the Shower Construction section, I think you'll find the first thread in there will 'splain you what you need to know.
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Old 09-09-2013, 06:07 PM   #11
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Got the shower pan done just fine appreciate the help.

The project was on hold while she was waiting on tile for the floor to get shipped. The tile she chose was a "penny" tile. She told me the listed thickness was 1/6" (5/32"). The tile came today and it's barely 1/8" thick.

Is that thick enough for shower pan tile? Is there a recommended thickness for a shower floor?

Thanks again...
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Old 09-09-2013, 08:41 PM   #12
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Mike, the thickness is fine. The thin tiles will be more challenging to install than thicker tiles. With small tiles, make sure the mud is fairly smooth without any quick humps. Being thin, you will have to use a small notch trowel to keep the thinset from coming up and filling the joints. Keep a wet sponge handy along with a utility knife to scrape away any thinset.
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