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Old 01-22-2013, 09:52 AM   #61
cx
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Shoot for half an hour, George, and for sure try not to be foolin' with it after 45 minutes or so. The mud will tell you when it's tired of being worked, but you don't wanna learn that part while doing your actual floor. Mud's cheap and it doesn't hurt at all to mix up a batch and just play with it on the floor somewhere to get a feel for it.

Dry-mix all you'll need and half a foot extra so you can just add water and mix again when you're ready to use it. You don't need to rush, just don't dawdle, and be sure you've got time to do nothing else but place and shape mud once you start. Having a helper mix after you've made your first batch or two is very helpful, but you can live without it if necessary.

If you can get you an ever-so-cute and efficient helper like that girl back in post #50 it will all be a far more pleasant experience, too. I hadn't ever tried that until very recently.

My opinion; worth price charged.
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Old 01-24-2013, 08:07 PM   #62
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I have suffered through grout cracking at the wall/floor plane change and caulk molding or shrinking at the wall/wall plane change in almost every shower I have owned so in addition to the kerdi drain and membrane system I thought I wanted to use the plane change joint movement pieces such as dilex EKE. I was looking at them at my local store this week and see that the dilex EKE uses a rubber like material like a pencil eraser that you can dent and scratch. It looks like something that might get messed up over time. The metal types such as dilex AHK are quite a bit larger and the PVC versions look like they can get scratched or discolored.

What are you guys using at the plane changes when the Kerdi membrane is used?

Thanks.
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Old 01-24-2013, 08:27 PM   #63
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Oh George you HAD to go there. We have some Pro's who grout the inside corners of their kerdi showers and some* who caulk only with 100% silicone.

You'll have to pick what's right for you.




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Old 01-24-2013, 09:02 PM   #64
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Is anybody using the Schluter products like Dilex and if so, how do they work out?
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Old 01-25-2013, 08:21 PM   #65
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Does the Kerdi act as an isolation membrane of sorts, reducing or eliminating the grout cracking at the plane changes?
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Old 01-25-2013, 09:06 PM   #66
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1- I don't

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Old 01-28-2013, 05:42 AM   #67
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My backer board is Wonderboard, cement board. There are spots with either drywall mud and/or primer paint on them. Can the unmodified thinset/Kerdi go directly over those areas or do I need to clean any of that off of the cement board first? Not shown in the picture is a knee wall with mud and primer on the top surface where I would like to wrap the Kerdi to protect that ledge under the frame and glass.

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Old 01-28-2013, 12:43 PM   #68
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George,

If its 'hot mud' (dry powder mixed with water) apply the kerdi as usual. If its pre-made mud, then primer with regular drywall primer then kerdi as usual.
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Old 01-28-2013, 05:34 PM   #69
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It is dry powder mud but it's not "hot", or a setting type like Durabond. It's a special low toxicity mud that has a std drying time.

Sounds like I should prime any exposed mud with drywall primer before Kerdi. I assume that drywall primer can't hurt regrdless of the type of mud used. Is that correct?

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Old 01-28-2013, 06:34 PM   #70
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Hi George, yes keep the primer off the areas that don't need it like the Wonder board. Just prime the drywall mud.
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Old 01-28-2013, 09:22 PM   #71
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Mike

In places where they got drywall mud on the Wonderboard, I should prime those places, correct?
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Old 01-28-2013, 10:48 PM   #72
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Hi George, yes prime that too.
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Old 01-30-2013, 09:26 AM   #73
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All drywall mud is primed and ready to go, getting ready to tackle the mud pan with portland and sand per the instructions and calculator on this site. I am using all low toxicity products for this healthy home and the unmodified thinset that is the best so far is Jamo GTS. It must be among the lowest in mystery additives. I realize that it's not one of the usual suspects for Kerdi such as Laticrete 317 et al (I have tested most of them) but it does appear to have a high portland content. Is there any test I should do to be certain that Jamo GTS will give me good Kerdi results before I do the whole shower?

Thanks.
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Old 01-30-2013, 10:19 AM   #74
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Not really familiar with that particular morter. Having used 317 and DitraSet extensively, I recommend them. You could try a test board with your product or call Schluter to see if they've any experience with it.
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Old 01-30-2013, 10:24 AM   #75
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What would constitute a successful board test? I have read that the Kerdi is easy to peal off after a quality application. Many of the pros here have cautioned not to pick at the membrane or worry if it peals off easily, that once tile is installed, it's all good.

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