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Unread 01-16-2017, 10:05 PM   #1
pokerliz
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mudding a larrrggee shower floor. Help??

Hi guys. quick question on mudding a shower. big shower. 90 long by 48 wide. The drain is not centered but it is 26" from the front wall. The rain shower head only comes out 12", so it's not like there will be a large spray to the back portion of the shower.

Anyway, I did the mud calculator but it's saying this:


Oh, this is over a hot mop, pre-sloped to standards. (yes Calif!)
what is the proper slope for the floor for this large field?
Also, can I mud floor first and then walls or walls first? Having a hard time figuring out the tile placement for the accent wall because I need to have the floor in place first to measure.
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Unread 01-17-2017, 10:21 AM   #2
Todd Groettum
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get 5 80# bags of sand mix..400 lbs should be plenty with 30+ s/f ( you might get by with 4 but get 5)....that long run should run an 1/8" per foot of slope minimum...Your slope will be a bit more severe on the short end which is one of the downsides of this type setup and why so many are going to Trench drains with the larger showers...
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Unread 01-17-2017, 12:51 PM   #3
pokerliz
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Thanks Todd. I had wanted to go w/a trench in the design phase. I guess I should have come here first to ask.

Can you tell me if I can do floor first and then mud walls or do walls have to come first?
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Unread 01-17-2017, 06:31 PM   #4
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IF you don't use the minimum 1/4"/foot slope, it's harder to ensure you don't end up with an flat or low spots when the slope is lower, and you'll end up with more moisture in the setting bed (hope the weepholes are not clogged!). IMHO, this begs for a surface applied membrane and a linear drain verses a center, conventional round one.
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Unread 01-18-2017, 08:11 AM   #5
Todd Groettum
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I agree the 1/4" is better but that will give a Very severe drop on the short end and make that mud work far more difficult..Take the time on that 1/8" per foot, its tricky for a pro to get right so keep your eye on the prize... Use a good level, Lay in Mud screeds first and fill in checking constantly....USE a GOOD Level!!!
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Unread 01-18-2017, 12:29 PM   #6
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Quote:
Originally Posted by Jim
IF you don't use the minimum 1/4"/foot slope, it's harder to ensure you don't end up with an flat or low spots when the slope is lower, and you'll end up with more moisture in the setting bed...
Not to mention that plumbing code and tile industry standards require the 1/4-inch per foot slope as a minimum.
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Unread 01-19-2017, 12:03 AM   #7
pokerliz
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Thanks Todd,,,I think I'm gonna hire out for that one. I've only done 1 mud bed and although it was passable, I want perfection on this bad boy!

I had planned on doing the 1/4", but what if I did 3/8" ? better? I think that 1/2 will look like a ski slope
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Unread 01-23-2017, 09:52 AM   #8
Todd Groettum
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If you can Move the Drain I would do that...then do the 1/4".....I have done a couple minimal slope showers due to piss poor planning in the mechanicals department....I would bet your Pro will suggest same....

One thing...if you do go to moving that drain, Perhaps consider a square Drain system like Noble's.....Great Look, great product and wont break the bank..

http://noblecompany.com/products/clamping-ring-drains/
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