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Unread 03-11-2021, 02:55 PM   #1
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2” Hex Over Ditra?

Just got off the phone with a Schluter rep and they said that, given their 2” minimum tile size spec, a 2” hex tile is fine over Ditra. Anyone do this type of install before and have tips?

Is it better to trowel some thinset flat to fill the voids and let it dry before proceeding with the tile installation, or do it all in one go?

1/4” Durock is also an option, but the extra crack isolation properties of Ditra are steering me in that direction...
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Unread 03-11-2021, 04:08 PM   #2
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I can only post with my own experience. I tiled our basement bath with 2" hex tiles over Ditra, and it went fine. I had prefilled some of the waffles but not 100% by any means. The places where it was an issue were where I had to make cuts...on edges and around where the toilet waste pipe came out of the floor (note that flange is above the tile, so I did that right).

The install looks good IMHO...but I am just a humble DIYer. I'd trust the experts on this forum.

I'm attaching a photo that was about midway through the floor tiling process. And in case you ask, the reason I didn't start in the center was because I was trying to pattern match with the shower floor, which was already done...so I started at that edge and worked out from there. Call me lucky...worked out fine.
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Unread 03-11-2021, 11:38 PM   #3
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I just got done laying Ditra a while back in my bathroom and went the prefilled method.
Worked out fantastic.
Didn’t have to worry about trying to do two things at once (fill cavities & get a nice straight trowel line).
Made sure cavities where full and was smooth.
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Unread 03-12-2021, 09:05 AM   #4
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Hi Matt,

Pre-filling or not pre-filling is up to you. Both methods work and are okay with Schluter.
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Unread 03-12-2021, 12:39 PM   #5
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Bear in mind ditra is an uncoupling membrane. For which there are no industry standards. Ditra doesn’t meet (or at least advertise themselves) as meeting the ANSI standards for crack isolation.
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