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Did the wrong ratio for Deck Mud in my Shower Pan

Did the wrong ratio for Deck Mud in my Shower Pan

Old 09-14-14, 05:13 PM
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Did the wrong ratio for Deck Mud in my Shower Pan

This is my first bathroom remodel and I'm putting in a shower pan to put tile over.
I read that you have to do a 5:1 ratio of sand to portland cement.

I mixed two 50 lb. sand bags and added 10 lbs. of portland cement. This is a 10:1 ratio. I added about 1.5 gallons of water to the mixture. I completed the pre-slope of the shower pan and later someone pointed out the incorrect ratio. The top seemed very sandy.

Should I rip out the pre-slope deck mud, or cover it up. I read somewhere that you can apply a thin set of thin-set mortar if you mix it a little watery.

Old 09-15-14, 04:06 AM
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Welcome to the forums! From the amount of water you added, it appears you "poured" the pan. If so, it has to come out. Shower pans are "packed" with semi dry mix. The ratio of 5:1 is good....10:1 is too sandy. Study the installation of shower pans here, to gain better insight. How to build a shower - Building a shower pan with pre-sloped mortar bed, liner and curb.

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