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Old 01-21-2018, 07:27 PM   #16
GoRoos
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Did I mess up the flange?

Hey all -

Hoping I didn't mess this up so bad I'm going to have go re-demo

I've hung the CBU above an alcove tub and "taped and bedded" with alkali-resistant tape and thinset.

I'm beginning to worry that I mis-read the instructions - there's a small gap (less than 1/4") between the bottom of the CBU and the top of the flange - I'm beginning to think that was supposed to be between the horizontal surface of the tub, not the flange.

Plan is to redgard over the CBU, then tile, so there's no plastic barrier to overlap the flange.

Is this a tear-out-and-start-over? Or is there a respectable work around? Or did I mis-understand my misunderstanding, and this is actually acceptable?

Super-zoomed-in picture of the gap attached.
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Old 01-21-2018, 08:02 PM   #17
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Because we all like pictures, here's what it looked like halfway through demo (at this point, I had the old tile off and the original greenboard was showing....note that gap then was WAY bigger than the gap I have now....so, maybe I'm good ).
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Old 01-21-2018, 08:13 PM   #18
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RedGard Uncoupling Membrane?

Anyone have experience with this stuff:

http://www.custombuildingproducts.co...pling-mat.aspx

Ditra and Stratta get lots of press - but this stuff is much easier for me to get my hands on.
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Old 01-21-2018, 08:43 PM   #19
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Welcome to the forum, Jay.

The others are older, so they’re generally more widely known.

But if you’re looking for Ditra, it’s easily available at any Home Depot.

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Old 01-21-2018, 09:22 PM   #20
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At least here in the Dallas area, Home Depot seems to have stopped carrying ditra in store and has switched to the redgard. I can still have it shipped - but nothing in store.

My guess is they've got some kind of exclusive with Custom, and now that they have the Redgard membrane out, they don't carry the ditra.
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Old 01-22-2018, 06:45 AM   #21
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I havent used it but know alot of guys that do, it will work just fine.
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Old 01-22-2018, 09:39 AM   #22
John Bridge
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Hi Jay,

If you plan on using a fairly large tile you're okay. Use a mesh or a strip of tiling membrane to overlap the board and the flange. Then RedGard it along with the rest of the walls. A suitable tile would be about 6 in. square or larger.
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Old 01-22-2018, 11:21 AM   #23
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Quote:
Originally Posted by Tool Guy - Kg View Post
Welcome to the forum, Jay.

The others are older, so they’re generally more widely known.

But if you’re looking for Ditra, it’s easily available at any Home Depot.

Easily available at my home depots means that you need to special order it. My home depot does not stock it. The Lowe's in my area does stock ditra. I am in northern California.

Home depot here stocks the regard uncoupling membrane. I am sure it's the same as ditra. Maybe better


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Old 01-22-2018, 01:24 PM   #24
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I can get any of those through local outlets, but unless I need it right away, I order through Amazon where it's the same price or less, no sales tax, and shipped to my door.
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Old 01-23-2018, 09:27 PM   #25
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Redgard Uncoupling Membrane is my favorite one. The green color was better but I'm pretty sure nothing else has changed about it.
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Old 01-23-2018, 09:42 PM   #26
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Jay, what does the Redgard mat cost per sq ft?

In Dallas, when I need Ditra I get it from Interceramic. Dal tile wants to sell it in full rolls only. Interceramic will peel off what I need and sell it by the sq ft. 1.32 a sq ft the last time I bought it. I don't know if that's a good deal or not.

Lowes also has Ditra, best I remember it's about 1.60 a sq ft.
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Old 01-24-2018, 02:47 PM   #27
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Lowe's carries Schluter Ditra and/or Ditra XL. It's great stuff!
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Old 01-24-2018, 02:57 PM   #28
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Redgard Uncoupling Membrane is my favorite one. The green color was better but I'm pretty sure nothing else has changed about it.
Jim, you might be thinking about the Spiderweb mat. Redgard mat is completely different. It feels to me like setting on carpet. I don't care for it.
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Old 02-02-2018, 12:54 PM   #29
GoRoos
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After an unexpected delay getting tile on-site, I'm getting ready to redgard this weekend. (Glad that I read somewhere that you shouldn't let a redgarded surface sit exposed for a long time...and glad that I thought to wait to apply it until I actually had possession of the tile...).

What coverage should I expect from the "primer coat"? I've got about 100 square foot of hardibacker to prime. Any guesses at how much primer I should make up?
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Old 02-02-2018, 09:16 PM   #30
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I ended up using 40 oz of redgard to 160 oz of water (200 oz total "primer"). I had about 1/2 of it left over at the end. So that's probably 1 oz of "primer" per square foot. Seems like awefully little - but I couldn't have put the stuff on thicker if I tried.

(And someone shoulda' warned me about the mess I was about to make - it was made far easier by the fact that it was over a tub - so I could use a bucket and sponge to wash the tub out afterward...but, geez..what a mess. :P)

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