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Old 03-04-2018, 02:08 PM   #5
Moderator -- Mud Man
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Join Date: Jan 2003
Location: Princeton,Tx.- Dallas area
Posts: 31,309
You need to get the floor flat before installing the Ditra. With the correct amount of thinset under the Ditra, it will pretty much follow the floor height. Adding more thinset won't raise it but rather make it real wavy. You have to mash the Ditra into the thinset and when you do that with 1/2 inch notches, it won't mash down evenly over the floor. Sounds like a big mess if you do that.
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