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Old 07-19-2013, 08:16 AM   #1
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Mixing and using mortar under my shower pan.


I'm installing an acrylic American Standard shower pan over Advantech using mortar as a base to strengthen the shower pan.

Shower base is 32" x 60"

Question:

What mix ratio should I use for this installation?

I'm wondering if I should mix up a 40 lb. or 80 lb bag...

Here's the mortar mix that I'm considering:

http://www.lowes.com/pd_10391-286-11...mix&facetInfo=

Any help and comments will be greatly appreciated.

Thanks, Ed

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Old 07-19-2013, 08:58 AM   #2
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Mixing and using mortar under my shower pan.


The mortar you selected is fine----mix it so it is rather dry----you don't want it settling after you set the pan----use a number of smallish piles---I call it the 'cow pie' method.

Use enough to reach the bottom of the pan floor but not so much that the pan will not touch the floor..

Set the pan onto the 'cow pies' and slide the pan back and forth to set the pan--

do not step into the pan--that will over compress the mortar --the pan will spring back to shape,leaving you with a hollow under the pan--add screws or roofing nails to the framing above the flange to keep the pan in place. Do not screw onto the flange--that often leads to cracks---Mike-----

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Old 07-19-2013, 08:59 AM   #3
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Mixing and using mortar under my shower pan.


when I did my shower pan I just used unmodified thinset and it was about the same size pan, probably only used half a bag and it was 40lbs I think.
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Old 07-19-2013, 09:47 AM   #4
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Mixing and using mortar under my shower pan.


I used 3 bags on my shower....as for 'wetness'...cow patty is too wet.....

I filled up a 5 gal bucket about half way with mortar.....then using a mixing bit started pouring in water until it looked like damp sand.

If you trowel it and the top gets wet.....you have too much water.

Put a clump in your hand....if your hand gets wet...you have too much water.

Actually....the color is a good key....just enough water so it go dark gray...any dry spots show up light gray.
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Old 07-21-2013, 01:30 PM   #5
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Mixing and using mortar under my shower pan.


Thanks for the suggestion...about mixing the mortar for my shower base.
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Old 07-21-2013, 10:05 PM   #6
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Mixing and using mortar under my shower pan.


I did this a couple weeks ago.

I mixed a bag in a 5 gal bucket with my propeller mixer. Mixed fine.

I put plops under the drain, and where each foot would set. I had them marked on the floor.

I then did stand in it a bit and made sure the flange was level on the three sides and I nailed the flange in. It felt very stable after that.

I took the extra mortar and threw it down between the studs on two sides and then put my hand and arm back there and pressed it down into the area between the pan and the bottom plate on the wall.

I called it good.

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