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Old 03-05-2018, 11:46 AM   #1
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tile redi shower base install

Finally after three tries I managed to install our 36 x 36 tile redi base, it was impossible to do the approved way. I ended up flipping it over and filling in the ribs letting it set up and then buttering it and the floor then placing it. I can provide details. It is rock solid. In any case I'm at the point of taping the joints after installing Hardie board like they show in their installation video with their invented flashing. If done that way there is a significant step between the base inner wall and the walls. So my question is, is this ok because the thinset, tape and then thinset smoothed over it all plus two coats of RedGard will make this transition work when placing tile? Or do I have to smooth this transition better from the get go so the surfaces are as close to co-planar as possible?
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Old 03-05-2018, 02:00 PM   #2
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Hi Ken,

I have no experience with Tile-Ready products, but it looks to me like you'll have to even that up somehow. Thinset, etc., won't do it. Maybe a picture that shows a more of the installation?
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Old 03-05-2018, 02:39 PM   #3
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Can't say I've installed one of these either, but I did look at installation instructions online. Is this their Redi Flash?

One of the problems with putting silicone anywhere in the setting bed is that nothing will adhere well to it. It really doesn't even adhere to itself very well. It would appear to me that if their flashing is installed correctly, there's no need for silicone caulk at that juncture.

What's your intention for waterproofing the walls?

Reread your post and see that you intend RedGard. My concern would be bridging from Hardie to pan. The metal and the silicone will pose adhesion problems.
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Old 03-05-2018, 05:38 PM   #4
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John attached is an overall picture (I don't see how to rotate the attached pic before sending, sorry), I agree that I need to get that junction more coplanar than it is now to have my tile set and aligned properly. Fortunately all is only screwed in place except for some bottom silicon.

Carbidetooth. Yes that is their rediflash. Your concerns are my concerns. I understand that RedGard over the shower walls(Hardie backer board) is a good thing but RedGard won't adhere to silicon or the base. I have to use their epoxy thinset to set the base tiles, curb tiles and the side tiles of the pan. I believe for the walls I need to go over all the junctions and transition with thinset, apply tape and then more thinset and smooth it all out before using RedGard for final waterproofing. I don't know what to do about the wall pan junction.

I have contacted Tile Redi and asked them for clarification of how the wall board, to flashing to pan junction is done. I wonder what they intended to happen under and over the flashing. It would seem that the flashing would need to be bonded to the wall of the pan since that 1" wide strip is significant area especially where located.

My opinion says for an amateur it would be far easier to plant the shower base and then build the walls up around it if there is that choice. And to fill the ribs first.

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