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Unread 10-27-2011, 09:47 AM   #1
tres0422
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Thinset to use with Kerdi

Hey guys,
I have put up HardiBacker and decided to put Kerdi over it. Before I purchased the Kerdi I purchased latex mod thinset. I am putting 12X18 Travertine tiles on the wall.

Should I take the mod thinset back or would it be low risk to use it?

Would it be ok to attach the kerdi to the hardi with thinset working all the extra thinset and bubbles out then let it sit for 24hrs before going back to putting up thinset and the tile?
Thanks,
Tres
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Unread 10-27-2011, 10:25 AM   #2
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Depends on which modified thinset you bought. Highly modified thinsets (reallly expensive ones) require air for them to dry. Lightly modified thinsets cure and dry, so they are OK, as long as you understand that even they void the Schluter warranty. Versabond, and entry-grade modified thinsets will work, if the warranty is not important to you.

As far as the last question, that's pretty much the way it works. You could tile on the Kerdi as soon as you finish installing it, but you'll probably be ready for an adult beverage instead.
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Unread 10-27-2011, 12:10 PM   #3
tres0422
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Cool.

I'll go get the unmodified....I think i went with the expensive modified stuff..

Is there a limit to how long I can wait after putting the Kerdi up to get the thinset and tile up? I know I can get the Kerdi up wait 30 minutes then throw the thinset and tile up....but could I wait 24hrs or wait a week before throwing the thinset and tile up....

Thanks,
Tres
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Unread 10-27-2011, 12:11 PM   #4
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BTW....Thanks for the reply bbcamp.
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Unread 10-27-2011, 12:14 PM   #5
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As far as I know there is not limit. The initial time is for the mud to set enough to hold it in place enough. After that it just bonds stronger. Really at that point I would worry how long you can protect it from an accident that punctures the membrane than anything.

Also make sure not to get bottom of the line unmodifed thinset.
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Unread 10-27-2011, 12:18 PM   #6
tres0422
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Hey Wapa,
Thanks for the response. Which thinset do you recommend for Kerdi to Travertine?
Thanks,
Tres
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Unread 10-27-2011, 12:53 PM   #7
wapa
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I know laticrete megabond is regarded pretty well around here. Other than that I would have to look them up again.

To put it a bit in perspective megabond sells at lowes for 11 dollars a 50 lb bag. Then the cheapest lowes sell is 5 dollars for 50 lbs. So basically you want to stay away from the 5 dollar stuff.
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Unread 10-27-2011, 01:17 PM   #8
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Quote:
Originally Posted by wapa
So basically you want to stay away from the 5 dollar stuff.
Amen, brother!

If you could lay your hands on Ditra-set, angels would sing to you as you work.
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Unread 10-27-2011, 06:47 PM   #9
Lazarus
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Another great unmodified thinset is Laticrete 317.....
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Unread 10-27-2011, 07:11 PM   #10
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I'd use white thinset for travertine as grey can discolor the stone.
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Unread 10-27-2011, 07:28 PM   #11
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Tres,



Don't forget to wet the Hardi good prior to troweling on the thinset.
Or even prime it. The Hardi sucks the water out of the thinset and you will have a nightmare if you don't plan for it.
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Unread 10-27-2011, 08:10 PM   #12
tilelayer
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My thinset choice is 317 or kerabond or full set plus or sturdi set or 272 or ditra-set. You get the picture....
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Unread 11-09-2011, 12:18 PM   #13
tres0422
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Opps I may have screwed up.... I have Versaset(??) white. I was planning on using it between the Hardi and Kerdi...... What are you guys' thoughts? I think it was cheap so if there is a large group of you saying scrap it....I'll ditch it.

Thanks,
Tres
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Unread 11-09-2011, 01:01 PM   #14
Brian in San Diego
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Tres, if you have white VersaBond you have a slightly modified thinset which many pros including John Bridge use to apply kerdi. You will void the warranty, but if you do everything properly you won't need a warranty. If you don't do everything properly then the warranty would probably be useless anyway.

Make sure you sponge the hardi (as mentioned before) and you mix your thinset loose according to the kerdi installation instructions.
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Unread 11-09-2011, 01:10 PM   #15
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Versabond will be fine in that application. It'll dry nicely next to the Hardi.
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