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Old 03-19-2018, 07:42 PM   #1
jlogan
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Tile at exterior door, height question?

Attached is a pic of my dry install with tile and durock at exterior door threshold. I'm concerned about my height here. I've got a 1/4" left from top of threshold to top of tile.

How much growth can I expect from mud under the durock and then thinset below tile?
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Old 03-19-2018, 08:06 PM   #2
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Hi, Jerry.

Boy, that’s really pushing it. If you’re using a 1/2” notched trowel for your tile, that collapses down to a little less than 3/16”. And the mortar under the cement board might be a pinch over 1/16”, depending on the exact size trowel (lots of pros may be using a 1/4” notched trowel that’s worn down to about 3/16”).

What is your subfloor? How thick of Durock were you planning? Would you consider using Ditra instead of Durock? Can the door be moved up at this point in construction?

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Old 03-19-2018, 08:22 PM   #3
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I've got osb subfloor, 1/4" durock and was planning on using a 1/4" x 1/4" trowel. Negative on the door being moved up.
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Old 03-19-2018, 08:24 PM   #4
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Oh and have no idea about Ditra. So hadn't considered it.
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Old 03-19-2018, 08:48 PM   #5
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This would save you 1/8".
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Old 03-19-2018, 08:58 PM   #6
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Yea, I think I'm already sold on the idea. Do I still us unmodified under the Ditra? I've got two bags that cover 75sq ft./bag. on a 132 sqft. kitchen floor.

This for the thinset under tile

http://https://www.homedepot.com/p/Custom-Building-Products-VersaBond-LFT-50-lb-Gray-Fortified-Medium-Bed-Mortar-VBLFTMG50/205789819

This for under Ditra.

https://www.lowes.com/pd/MAPEI-Large...um-Bed/3743785
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Old 03-19-2018, 10:08 PM   #7
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Depends on what you're installing Ditra over. Assuming this is plywood, the regular Versabond will work. You don't really need a large format mortar under Ditra.
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Old 03-20-2018, 05:56 AM   #8
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if your installing ditra over plywood you do not want to use the versabond lft. it doesn't inbed the fleece enough. ive tried. regular versabond does a way better job. so id take the lft back and get the regular.
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Old 03-20-2018, 01:00 PM   #9
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I'm installing over OSB. Will the regular work for that too?
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Old 03-20-2018, 01:10 PM   #10
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Yes it will.
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Old 05-14-2018, 08:46 PM   #11
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I'm laying out the ditra and have a couple of questions.

I'm going to transition from a kitchen to a living room wood floor. After cutting the first piece of Ditra for a side wall of the kitchen, I realized I cut too short (1st image) as I wanted the tile to fill the transition completely from wall to wall. The transition being between two walls. To fill the missing piece in the image can I place a small piece of ditra to fill? Or should I cut to fit knowing that the other end will then need to be filled with a piece of ditra? I think the latter, as it would provide more surface area for the ditra and is under kitchen cabinets. That piece would be 18" x 39". Originally that piece was supposed to go where image 2 shows it. I cut it and realized I notched it for the gas line on the other wall. I chose the notch over the accurate length.

In the second picture (ignore the ditra piece, that's the piece in the first image opposite wall) how do I handle the plumbing? Since this is under a cabinet, I was thinking just cut a square notch that encompasses all three pipes. Or should I cut separate holes or notches so there is ditra between each pipe? Again I'm thinking the latter.

If you remember, this thread was started because I questioned my finished height using 1/4" durock. The image on the left is the original image without the durock in place. The image on right is the ditra with the tile. Thanks for the guidance on that one. It looks like it was a good one.
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Old 05-14-2018, 09:02 PM   #12
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Thought of another question. I plan on cutting the ditra at the transition so it is 1/4" longer beyond the transition into the wood floor side. Wood is not in yet. My thinking being, I could use a schluter transition piece and then cut the excess ditra after install. The tile and hardwood almost match up height wise, with the tile being a little lower.

Does the transition sit on top of the ditra? It seems to me it has to.
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Old 05-15-2018, 01:40 AM   #13
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You can lay out Ditra however it works best for you. As long as the pieces are at least two inches in either direction.

You'll want at least 1/4" between Ditra and any vertical surface, such as a wall, or even the edge of the wood floor. It has to have room to expand.
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Old 05-15-2018, 02:41 PM   #14
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Schluter specs a unmodified thinset for underneath and on top of the Ditra, the Versabond is modified and does not meet their requirement. FYI
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Old 05-15-2018, 07:06 PM   #15
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He's sticking the Ditra to wood so I think he will need modified under the Ditra.
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