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Unread 01-04-2017, 11:36 AM   #1
cpad007
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Deck mud to level/support tub?

I'm planning to use Mapei's 4 to 1 as a bedding mixture to embed/support my acrylic American Standard tub (click to see it). I will easily meet the minimum requirements for deck mud thickness.

Do I need a membrane (tar paper, plastic sheet, etc.) to keep the mud off the plywood? Or do I just plop the deck mud right on the plywood?

Or should I use something else other than deck mud?

Thanks!
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Unread 01-04-2017, 11:48 AM   #2
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That's not what you wanna use, Chris. In pre-bagged material you'll want a Mason's Mix or Mortar Mix for the purpose. You want something that your tub can moosh (sorry, technical term) into and deck mud, anybody's deck mud, won't do that.

I'd always recommend a cleavage membrane of some sort under the mud in that application. Some folks like also to put very thin (1.5 mill or so) polyethylene sheeting on top of the mud before setting the tub so's to keep the mud from actually adhering to the tub to facilitate future removal.

My opinion; worth price charged.
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Unread 01-04-2017, 11:55 AM   #3
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Cx, just clarifying, so 'moosh' is a technical term used by professionals, and 'smoosh' would be the term the rest of us should use? I wouldn't want to get into trouble with any professional associations, or anything like that.
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Unread 01-04-2017, 12:00 PM   #4
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Thanks, CX.

I'll use your moosh-able advice and go with the mortar/mason mix and maybe I'll do the next guy a solid (could be ME!) and add the saran wrap to the top of the mix to facilitate future removal.
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Unread 01-05-2017, 06:51 PM   #5
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Quote:
Originally Posted by cx
That's not what you wanna use, Chris. In pre-bagged material you'll want a Mason's Mix or Mortar Mix for the purpose. You want something that your tub can moosh (sorry, technical term) into and deck mud, anybody's deck mud, won't do that.

I'd always recommend a cleavage membrane of some sort under the mud in that application. Some folks like also to put very thin (1.5 mill or so) polyethylene sheeting on top of the mud before setting the tub so's to keep the mud from actually adhering to the tub to facilitate future removal.

My opinion; worth price charged.
Lurking here ...

So something like QUIKRETE 60-lb Gray Type-N Mortar Mix?

https://www.lowes.com/pd/QUIKRETE-60...ar-Mix/3006083
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Unread 01-05-2017, 07:43 PM   #6
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Think the official term is snotty.
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Unread 01-05-2017, 08:46 PM   #7
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Louis, I think that mud is fine. I also add lath over the tar paper or plastic to help the mud stay in place.
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Unread 01-06-2017, 12:19 AM   #8
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Good idea, Davy. I was kinda wondering how to keep the mud from MOOSHING all over the place (down the drain hole and out the front of the tub apron, etc.) and thought maybe to screw down a wooden frame that would clear the tub bottom but the lath ought to work, too.
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