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Old 01-24-2012, 07:10 AM   #241
Hammy
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Leon, Ive never put plastic over my shower floors. This water has to evaporate, usually into the air.

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Old 01-24-2012, 09:12 AM   #242
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Thanks Hammy, I know I don't need to have the plastic on it, but I am not doing anything to the bed until the weekend anyway. So it doesn't hurt anything to have the bed covered with plastic until then and let it retain the water to improve the curing reaction.
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Old 01-24-2012, 12:14 PM   #243
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It's always best to damp cure any Portland cement mix, Leon. Leave it covered 'till you're ready to work with it again, say I.

My opinion; worth price charged.
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Old 01-24-2012, 12:56 PM   #244
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That's what I always read too CX, hence the plastic .
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Old 01-25-2012, 08:36 PM   #245
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Now that the mortar bed is done, I am getting ready to Kerdi over the shower floor and curb. I could use some suggestions on attaching the Hardibacker pieces to the curb framing:

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I will use the Hardibacker screws for the mechanical attachment, but I'd like to also place something between the Hardibacker and the wood curb, to absorb any low spots or gaps in the wood pieces. Should I put a thin coat of thinset on the wood before screwing down the Hardibacker?
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Old 01-25-2012, 08:57 PM   #246
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Nails or screws. I prefer screws on the curb, keeps ya from banging on it.

I dont put any thing under the BB, but you could thinset it down.

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Old 01-26-2012, 12:35 PM   #247
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I would add some thinset, kind of like doing a very small floor. And after it's set, round over the edges a bit. It makes folding the kerdi over MUCH easier.
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Old 01-26-2012, 12:57 PM   #248
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Thanks Hammy and Wendy, thinset it is!
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Old 01-27-2012, 07:45 PM   #249
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The Kerdi fleece decided to throw me a bit of a curve, and I could use some advice.

Today as I thinset (if that's a verb) the Kerdi (bonded to the flange of my Kerdi-Line) to the mortar bed, I saw that the fleece delaminated from the Kerdi, as seen below.

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Particularly in the second photo, at the end of the Kerdi-Line, most of the fleece is peeled off the Kerdi.

My understanding is that the fleece is what helps bond the thinset to the Kerdi, so what happens when the fleece peels off? What do I do with the loose fleece, scrape it off and proceed to thinset the Kerdi-Band as planned, or ??
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Old 01-27-2012, 08:51 PM   #250
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that's no good Leon. The fleece is what hold the mortar, which holds the other layer of Kerdi's fleece. No fleece = no bond with mortar.

I think i'd call that a failure of the Kerdi in that area, for whatever reason. I'd call Schluter for a remedy. *IF* the Kerdi fabric is not damaged, then removing the loose, delaminated fleece and bonding with Kerdi Fix will work, but you shouldn't have to go that route.... I'd wanna know why that fleece is doin that, and what else is gonna fail.... ???
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Old 01-27-2012, 09:23 PM   #251
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Dana, I don't see any damage to the fabric. I can tell you exactly why (or rather when) the fleece started peeling. It started peeling when I started pulling off the protective covering on the drain, as shown and instructed in the Schluter video:
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As I was pulling off the sticky cover, it was pulling up the fleece with it. I tried the best I could to hold the fleece down, but that didn't quite work out.

So, there is no evidence of the Kerdi fabric being compromised, I am just worried about trying to thinset down the next layer of Kerdi and Kerdi-band to these areas. In fact, I was thinking of doing exactly what you suggested, smearing some Kerdi-Fix in the areas of the lifting fleece.

Given this added history and explanation, do you think I will be OK with removing the loose fleece, putting down Kerdi-Fix in those areas, then proceeding with thinset in the undamaged areas? I'm not exactly sure how to handle the interface between damaged and undamaged areas, would I just put thinset on the good parts of the Kerdi, and Kerdi-Fix in the areas of torn fleece?
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Old 01-28-2012, 08:07 AM   #252
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Leon, call Schluter: 1-800-472-4588 or your local rep. They need to see this.
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Old 01-28-2012, 08:14 AM   #253
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Bump, still scratching my head on this one. At least I am not alone, I seem to have the brain trust stumped as well:

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I am pondering a couple of options, looking at the big picture below:

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1. Ignore the loose fleece, proceed with original plan: put down a sheet of Kerdi on the floor to butt up to the drain Kerdi, then proceed with Kerdi Band over the butt joint and on all the edges.

2. Put down a bigger piece of Kerdi on the floor and overlap the whole flange and its Kerdi, perhaps add some Kerdi-Fix at the opening.

3. Tear off the existing Kerdi from the drain flange, and put down a big sheet of Kerdi over the whole floor and flange, with Kerdi-FIx around the opening. I am not liking this too much as I am sure it'll void the warranty.
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Old 01-28-2012, 08:18 AM   #254
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Sorry Bob, we must have cross posted... You are right, Option 4 is "wait and talk to Schluter".... I just hate to sit on my hands for the whole weekend, I doubt I can get a hold of anyone until Monday.

To be fair, I am not a pro, and I don't have a Schluter rep, so do you think I can really get someone to come out here and look at it?
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Old 01-28-2012, 08:19 AM   #255
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Yup, as expected, Schluter closed till Monday .
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