Thinset over KERDI............er, um....Ditra

[Hammy]

When you guys fill waffels in DIRTA the day before tiling. Does it matter what kind of thinset you use? I know to set the tile you need to use un-modified..
Hammy

[hotsauce]

If you're worried about the warranty, Schluter says nuttin' but unmodified between the Ditra & tile.

If you don't care about warranty......then it's your choice.

I know several folks (including JB) use slightly modified to modified to set tile on Ditra.

My .02.

[tilelayer]

I use 317 from laticrete. But I don't prefill. But if I did i would use 317.

[Hammy]

were not settin tile............we are filling waffels................Hammy

[johntrent]

I pre-fill & I use Ditra-Set.

[irish tileguy in michigan]

I dont pre-fill, but i use ditra-set to set the tiles and if i were to pre-fill id be very confident with the ditra-set.
Hammy, curious to why your only filling the waffles and not setting tile.

[custombuilt]

pre-filling seems like a waste of time to me..... But hey I use versabond.

And I like to get my tile down already so I can get a paycheck!

[Topspin]

I pre-fill usually. Why? Because the action of filling is easy, fast gives a faster set the next day. I'd bet it's faster to fill a floor then set next day, then do fill & set at one time. You can really whip when there are no tiles or layout lines to watch out foy. Also, if the concern about is drying time - you know that 100% of the modified will dry overnight.

I only use modified to fill when there is stll some left in the bucket after setting the ditra. Once I am out of that I mix up unmodified to fill the rest.

Per Schluter reps: " you must only use unmodfied over ditra". But if you read between the
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you can use a lightly modified thinset
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but no warranty in a pinch.

[tilelayer]

why is this thread titled thinset over KERDI if its about DITRA????

[ceramictec]

were not settin tile............we are filling waffels

I'm lost too.
but you are going to tile it and then the thinset will
be between the tile and the Kerdi Dirta Ditra

[ceramictec]

pre-filling seems like a waste of time to me

not really.
if I do a small job I wont. set the Ditra then fill and set tile.
If I do a large job, set all Ditra and pre-fill, set tile next day easier.

but to each is own.
I just hate pushing around so much thinset when setting the tile.

[muskymike]

Hammy, it doesn't matter on the prefill.

[Aquera]

I pre-fill because I think makes setting the tile easier and I believe its a better/stronger bond. I use the flat side of the trowel, so I do a few square feet at at time, takes only a minute or so.. If the waffles aren't filled, I don't sleep well.

[Tool Guy - Kg]

When I do pre-fill, it's with DitraSet or Kerabond.

And Mike...just what part are you referring to when you say you feel you're getting a better/stronger bond? Ditra to thinset, pre-filled thinset to setting thinset, or thinset to tile?

[Hammy]

why is this thread titled thinset over KERDI if its about DITRA????

Guess I wasnt thinking straight.......... what else is new. Thanks for editing the title. Hammy