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Unread 12-10-2019, 04:25 PM   #31
cx
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My concern would be vertical movement of the tile installation, Traci.
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Unread 12-10-2019, 05:37 PM   #32
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Thank you! I will fix it.
One more question....I am setting 12 x 24 porcelain over the ditra that is now pre filled with thinset over the heat cables It had cured for 3 days, not that it needed to.
I have Mapei uncoupling mortar that exceeds ansi 118.1 with water and 118.4 with polymer. Based on my reading I need unmodified with ditra to tile but I've also read that modified is better for porcelain setting.
Should I use water or polymerwith the mortar mix?
Thank you a hundred times by the way: )
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Unread 12-10-2019, 06:46 PM   #33
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Hi Traci. I would use a good modified thinset mixed with water.
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Unread 12-10-2019, 07:02 PM   #34
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Is that what I have?
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Unread 12-10-2019, 07:41 PM   #35
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No, it's not, Traci. Read the specifications for that mortar again. If you mix with water you meet ANSI A118.1, which is a dry-set mortar. If you mix it with their additive you meet the requirements of A118.4, which is a modified dry-set mortar. Davy is recommending a mortar that indicates it meets A118.4 when mixed with water. That information will be printed on the bag.

With the large format tiles you have I would likely forego any repair of your small unbonded portion of your DitraHeat. More correct to repair it, but if it's not in the traffic area, I'd take my chances. Your mileage may vary.

My opinion; worth price charged.
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Unread 12-11-2019, 07:18 AM   #36
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If you have a HD near you, Traci, they have a thinset mortar by Custom called "Versabond", and that will be just fine for setting your tile. Get the white, and you don't really need the "LFT" variant.
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